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K. Qu
School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha, 410114, China

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Journal article
Published: 27 July 2021 in Ocean Engineering
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Many coastal countries are concerned with sustainable energy generation to meet their current and future energy needs. Tidal energy is an attractive resource as in-stream turbines can generate electricity even at moderate flow velocities. However, not all coastal areas are equally well-suited for tidal energy development. The survey of potential locations and their power densities is a crucial step in evaluating the potential cost-benefit of tidal energy. This research surveys the intensity and distribution of offshore tidal energy along whole coastline of China based on a high-resolution numerical simulation with a minimum mesh spacing of 80 m. The Finite Volume Community Ocean Model (FVCOM) has been used to carry out the numerical simulation work. Since FVCOM uses an unstructured mesh, it can accurately identify complex coastlines, such as those along islands, waterways, and estuaries. The simulation period for this numerical survey is 30 days. The accuracy of the simulation results is validated using 8-days in-situ measurements obtained at 17 coastal stations in the region of study. Research results indicate that the total mean tidal energy is 1.19 × 1014 J along the coastline of China. The tidal energy is mainly distributed in the south and southeast of the coastline of China. This study also identifies 45, 23 and 9 top sites, where the averaged tidal energy density is greater than 500, 1000, and 1500 W/m2, respectively, suitable for tidal energy extraction and utilization. Considering the long development cycle of tidal energy and global climate change, this study also investigates the impact of sea-level rise (SLR) on tidal energy distribution in the region of study using a 50-year (0.5 m) and 100-year (1.0 m) SLR scenarios. It is found that the total mean tidal energy increases by 3.0% and 6.5% for 50-year and 100-year SLR scenarios, respectively. It is believed that the findings drawn from this study could be instructive for future utilization of tidal energy along the coastline of China.

ACS Style

C.B. Jiang; Y.T. Kang; K. Qu; S. Kraatz; B. Deng; E.J. Zhao; Z.Y. Wu; J. Chen. High-resolution numerical survey of potential sites for tidal energy extraction along coastline of China under sea-level-rise condition. Ocean Engineering 2021, 236, 109492 .

AMA Style

C.B. Jiang, Y.T. Kang, K. Qu, S. Kraatz, B. Deng, E.J. Zhao, Z.Y. Wu, J. Chen. High-resolution numerical survey of potential sites for tidal energy extraction along coastline of China under sea-level-rise condition. Ocean Engineering. 2021; 236 ():109492.

Chicago/Turabian Style

C.B. Jiang; Y.T. Kang; K. Qu; S. Kraatz; B. Deng; E.J. Zhao; Z.Y. Wu; J. Chen. 2021. "High-resolution numerical survey of potential sites for tidal energy extraction along coastline of China under sea-level-rise condition." Ocean Engineering 236, no. : 109492.

Journal article
Published: 08 August 2020 in Ocean Engineering
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Coastal bridges are vulnerable to extreme surges and waves generated during hurricanes and tsunamis. Over the past few decades, extensive research works were conducted to study the damage mechanisms of coastal bridges under the impact of extreme surges and waves. However, these research efforts mainly focused on the hydrodynamic characteristics involved in surge waves impinging bridges. However, there has been little research on mitigation measures to protect coastal bridges. This study examines the installation of a submerged porous breakwater to protect coastal bridge decks from the impacts of solitary waves. As an environmentally friendly wave-reduction device, submerged porous breakwater structures have been widely implemented in coastal regions due to their ease of installation and cost effectiveness. To investigate the performance of the submerged porous breakwater on the hydrodynamic loads of a coastal bridge deck under the impact of a solitary wave, a high-resolution numerical wave tank is established based on an open-source flow solver REEF3D, which numerically solves the governing equations of incompressible two-phase flow on a staggered mesh arrangement and captures the interface between air and water using a high-resolution level-set method. The hydrodynamic characteristics of coastal bridge decks with the installations of submerged porous breakwater are systematically investigated by considering the effects of six prominent factors, i.e. wave height, submersion depth, water depth, permeability, spacing distance between breakwater and bridge, and aspect ratios of breakwaters. Results show that the submerged porous breakwater is effective in reducing the hydrodynamic loads applied to the coastal bridge decks under most of the situations. Therefore, it is believed that the findings drawn from this paper can further enhance our understanding on the damage mechanism of coastal bridges under extreme waves and should be instructive for future bridge designs.

ACS Style

W.Y. Sun; K. Qu; S. Kraatz; B. Deng; C.B. Jiang. Numerical investigation on performance of submerged porous breakwater to mitigate hydrodynamic loads of coastal bridge deck under solitary wave. Ocean Engineering 2020, 213, 107660 .

AMA Style

W.Y. Sun, K. Qu, S. Kraatz, B. Deng, C.B. Jiang. Numerical investigation on performance of submerged porous breakwater to mitigate hydrodynamic loads of coastal bridge deck under solitary wave. Ocean Engineering. 2020; 213 ():107660.

Chicago/Turabian Style

W.Y. Sun; K. Qu; S. Kraatz; B. Deng; C.B. Jiang. 2020. "Numerical investigation on performance of submerged porous breakwater to mitigate hydrodynamic loads of coastal bridge deck under solitary wave." Ocean Engineering 213, no. : 107660.

Journal article
Published: 09 May 2019 in Algorithms
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In order to numerically investigate the free surface flow evolution in a cylindrical tank, a regular structured grid system in the cylindrical coordinates is usually applied to solve control equations based on the incompressible two-phase flow model. Since the grid spacing in the azimuthal direction is proportionate to the radial distance in a regular structured grid system, very small grid spacing would be obtained in the azimuthal direction and it would require a very small computational time step to satisfy the stability restriction. Moreover, serious mass disequilibrium problems may happen through the convection of the free surface with the Volume of Fluid (VOF) method. Therefore in the present paper, the zonal embedded grid technique was implemented to overcome those problems by gradually adjusting the mesh resolution in different grid blocks. Over the embedded grid system, a finite volume algorithm was developed to solve the Navier–Stokes equations in the three-dimensional cylindrical coordinates. A high-resolution scheme was applied to resolve the free surface between the air and water phases based on the VOF method. Computation of liquid convection under a given velocity field shows that the VOF method implemented with a zonal embedded grid is more advanced in keeping mass continuity than that with regular structured grid system. Furthermore, the proposed model was also applied to simulate the sharp transient evolution of circular dam breaking flow. The simulation results were validated against the commercial software Fluent, which shows a good agreement, and the proposed model does not yield any free surface oscillation.

ACS Style

Xingyue Ren; Fangjie Xiong; Ke Qu; Norimi Mizutani. Free Surface Flow Simulation by a Viscous Numerical Cylindrical Tank. Algorithms 2019, 12, 98 .

AMA Style

Xingyue Ren, Fangjie Xiong, Ke Qu, Norimi Mizutani. Free Surface Flow Simulation by a Viscous Numerical Cylindrical Tank. Algorithms. 2019; 12 (5):98.

Chicago/Turabian Style

Xingyue Ren; Fangjie Xiong; Ke Qu; Norimi Mizutani. 2019. "Free Surface Flow Simulation by a Viscous Numerical Cylindrical Tank." Algorithms 12, no. 5: 98.

Journal article
Published: 01 March 2019 in Ocean Engineering
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ACS Style

Zhiyuan Wu; Changbo Jiang; Bin Deng; Jie Chen; Yuannan Long; Ke Qu; Xiaojian Liu. Numerical investigation of Typhoon Kai-tak (1213) using a mesoscale coupled WRF-ROMS model. Ocean Engineering 2019, 175, 1 -15.

AMA Style

Zhiyuan Wu, Changbo Jiang, Bin Deng, Jie Chen, Yuannan Long, Ke Qu, Xiaojian Liu. Numerical investigation of Typhoon Kai-tak (1213) using a mesoscale coupled WRF-ROMS model. Ocean Engineering. 2019; 175 ():1-15.

Chicago/Turabian Style

Zhiyuan Wu; Changbo Jiang; Bin Deng; Jie Chen; Yuannan Long; Ke Qu; Xiaojian Liu. 2019. "Numerical investigation of Typhoon Kai-tak (1213) using a mesoscale coupled WRF-ROMS model." Ocean Engineering 175, no. : 1-15.

Journal article
Published: 29 January 2019 in Water
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Submarine pipelines have been extensively used for marine oil and gas extraction due to their high efficiency, safety, and low price. However, submarine pipelines are vulnerable to extreme waves (i.e., tsunami waves). Previous research has often used solitary waves as a basis for studying the impacts of tsunami waves on submarine pipelines, although the hydrodynamic characteristics and wave properties drastically differ from those of real-world tsunami waves. This paper numerically investigates the hydrodynamic characteristics of tsunami waves interacting with submarine pipelines, but instead uses an improved wave model to generate a tsunami-like wave that more closely resembles those encountered in the real-world. The tsunami-like wave generated based on a real-world tsunami wave profile recorded during a 2011 tsunami in Japan has been applied. Given the same wave height, simulation results show that peak hydrodynamic forces of the tsunami-like wave are greater than those of the solitary wave. Meanwhile, the duration of the acting force under the tsunami-like wave is much longer than that of the solitary wave. These findings underline the basic reasons for the destructive power of tsunamis. It is also noted that the hydrodynamic forces of the pipeline under the tsunami-like wave increase with wave height, but will decrease as water depth increases. In addition to the single pipeline, the complicated hydrodynamic characteristics of pipelines in tandem arrangement have been also numerically studied. It is believed that the findings drawn from this paper can enhance our understanding of the induced forces on submarine pipelines under extreme tsunami waves.

ACS Style

Enjin Zhao; Ke Qu; Lin Mu; Simon Kraatz; Bing Shi. Numerical Study on the Hydrodynamic Characteristics of Submarine Pipelines under the Impact of Real-World Tsunami-Like Waves. Water 2019, 11, 221 .

AMA Style

Enjin Zhao, Ke Qu, Lin Mu, Simon Kraatz, Bing Shi. Numerical Study on the Hydrodynamic Characteristics of Submarine Pipelines under the Impact of Real-World Tsunami-Like Waves. Water. 2019; 11 (2):221.

Chicago/Turabian Style

Enjin Zhao; Ke Qu; Lin Mu; Simon Kraatz; Bing Shi. 2019. "Numerical Study on the Hydrodynamic Characteristics of Submarine Pipelines under the Impact of Real-World Tsunami-Like Waves." Water 11, no. 2: 221.

Journal article
Published: 07 January 2019 in Ocean Modelling
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A modeling system is presented for simulation of multiphysics coastal ocean flows at scales from O (1) m to O (1,000) km, especially for high-fidelity simulation of local, complicated, free-surface phenomena. The system integrates the solver for incompressible flow on unstructured mesh (SIFUM) and the finite volume coastal ocean model (FVCOM) on the basis of domain decomposition. In this system, the former is built on the Navier–Stokes equations and simulates small-scale, fully three-dimensional phenomena in local flows, whereas the latter is based on the geophysical fluid dynamics equations and predicts large-scale, background ocean currents. The integrated SIFUM–FVCOM system is developed from a previous system consisting of a structured-grid model and an unstructured-grid model (Tang et al., J. Comput. Phys. 273, 2014), and it combines two unstructured-grid models and has the capability of dealing with free-surface phenomena and complex geometries in local flows. In the new system, SIFUM and FVCOM are two-way coupled via Schwarz iteration, and they march in time together as a single system. The SIFUM–FVCOM system performs as intended with regard to capturing physical phenomena (e.g., generation of dam-break wave and slashing of water at a structure), converging with grid spacing and time step, and permitting seamless transition of solutions for far and near fields. In addition, its prediction of benchmark flow problems matches well with analytical, computational, and experimental data. The system is able to simultaneously and directly simulate many multiscale, multiphysics, real-world phenomena that could not be handled before. Such capability is illustrated by its application to coastal flooding and the resulting impact on a coastal bridge and a beachfront house.

ACS Style

Ke Qu; H.S. Tang; A. Agrawal. Integration of fully 3D fluid dynamics and geophysical fluid dynamics models for multiphysics coastal ocean flows: Simulation of local complex free-surface phenomena. Ocean Modelling 2019, 135, 14 -30.

AMA Style

Ke Qu, H.S. Tang, A. Agrawal. Integration of fully 3D fluid dynamics and geophysical fluid dynamics models for multiphysics coastal ocean flows: Simulation of local complex free-surface phenomena. Ocean Modelling. 2019; 135 ():14-30.

Chicago/Turabian Style

Ke Qu; H.S. Tang; A. Agrawal. 2019. "Integration of fully 3D fluid dynamics and geophysical fluid dynamics models for multiphysics coastal ocean flows: Simulation of local complex free-surface phenomena." Ocean Modelling 135, no. : 14-30.

Journal article
Published: 04 April 2018 in Applied Ocean Research
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During the past few decades, there have been many instances of significant damage to coastal infrastructure, especially bridges, due to ocean waves generated by hurricanes and tsunamis. Since ocean waves and currents co-exist and twist with each other in natural marine environments and their interaction may result in more severe damaging waves, taking both of them and their interaction into account is important in better understanding of damage processes of coastal bridges. This paper conducts a numerical investigation on hydrodynamic load on a bridge deck due to joint action of solitary waves and currents. Effects of prominent factors including current velocity, submersion depth, wave height, and water depth have been studied. Efficiency of air vents in reducing the hydrodynamic load has also been discussed. The numerical investigation indicates that, in a linearly pattern, a current in the wave direction leads to a higher maximum of the hydrodynamic force in the horizontal direction, and a current in the opposite direction results in a lower maximum. However, the behaviors of other characteristics of the force, including the maximum of its vertical component and the minimums of its horizontal and vertical components, become complicated and highly nonlinear because of water overtopping on the deck. In addition, a current can play a pronounced role, either positive or negative, in efficiency of air vents in reducing the hydrodynamic load. It is anticipated that the findings in this paper will enhance our understanding on mechanism of bridge damage by waves and may also be useful in design of future coastal bridges.

ACS Style

Ke Qu; H.S. Tang; A. Agrawal; Y. Cai; C.B. Jiang. Numerical investigation of hydrodynamic load on bridge deck under joint action of solitary wave and current. Applied Ocean Research 2018, 75, 100 -116.

AMA Style

Ke Qu, H.S. Tang, A. Agrawal, Y. Cai, C.B. Jiang. Numerical investigation of hydrodynamic load on bridge deck under joint action of solitary wave and current. Applied Ocean Research. 2018; 75 ():100-116.

Chicago/Turabian Style

Ke Qu; H.S. Tang; A. Agrawal; Y. Cai; C.B. Jiang. 2018. "Numerical investigation of hydrodynamic load on bridge deck under joint action of solitary wave and current." Applied Ocean Research 75, no. : 100-116.

Article
Published: 15 March 2018 in Journal of Ocean University of China
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As a new type of submarine pipeline, the piggyback pipeline has been gradually adopted in engineering practice to enhance the performance and safety of submarine pipelines. However, limited simulation work and few experimental studies have been published on the scour around the piggyback pipeline under steady current. This study numerically and experimentally investigates the local scour of the piggyback pipe under steady current. The influence of prominent factors such as pipe diameter, inflow Reynolds number, and gap between the main and small pipes, on the maximum scour depth have been examined and discussed in detail. Furthermore, one formula to predict the maximum scour depth under the piggyback pipeline has been derived based on the theoretical analysis of scour equilibrium. The feasibility of the proposed formula has been effectively calibrated by both experimental data and numerical results. The findings drawn from this study are instructive in the future design and application of the piggyback pipeline.

ACS Style

Enjin Zhao; Bing Shi; Ke Qu; Wenbin Dong; Jing Zhang. Experimental and Numerical Investigation of Local Scour Around Submarine Piggyback Pipeline Under Steady Current. Journal of Ocean University of China 2018, 17, 244 -256.

AMA Style

Enjin Zhao, Bing Shi, Ke Qu, Wenbin Dong, Jing Zhang. Experimental and Numerical Investigation of Local Scour Around Submarine Piggyback Pipeline Under Steady Current. Journal of Ocean University of China. 2018; 17 (2):244-256.

Chicago/Turabian Style

Enjin Zhao; Bing Shi; Ke Qu; Wenbin Dong; Jing Zhang. 2018. "Experimental and Numerical Investigation of Local Scour Around Submarine Piggyback Pipeline Under Steady Current." Journal of Ocean University of China 17, no. 2: 244-256.

Journal article
Published: 01 January 2018 in Water Science and Engineering
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In view of the severity of oceanic pollution, based on the finite volume coastal ocean model (FVCOM), a Lagrangian particle-tracking model was used to numerically investigate the coastal pollution transport and water exchange capability in Tangdao Bay, in China. The severe pollution in the bay was numerically simulated by releasing and tracking particles inside it. The simulation results demonstrate that the water exchange capability in the bay is very low. Once the bay has suffered pollution, a long period will be required before the environment can purify itself. In order to eliminate or at least reduce the pollution level, environmental improvement measures have been proposed to enhance the seawater exchange capability and speed up the water purification inside the bay. The study findings presented in this paper are believed to be instructive and useful for future environmental policy makers and it is also anticipated that the numerical model in this paper can serve as an effective technological tool to study many emerging coastal environment problems.

ACS Style

En-Jin Zhao; Lin Mu; Ke Qu; Bing Shi; Xing-Yue Ren; Chang-Bo Jiang. Numerical investigation of pollution transport and environmental improvement measures in a tidal bay based on a Lagrangian particle-tracking model. Water Science and Engineering 2018, 11, 23 -38.

AMA Style

En-Jin Zhao, Lin Mu, Ke Qu, Bing Shi, Xing-Yue Ren, Chang-Bo Jiang. Numerical investigation of pollution transport and environmental improvement measures in a tidal bay based on a Lagrangian particle-tracking model. Water Science and Engineering. 2018; 11 (1):23-38.

Chicago/Turabian Style

En-Jin Zhao; Lin Mu; Ke Qu; Bing Shi; Xing-Yue Ren; Chang-Bo Jiang. 2018. "Numerical investigation of pollution transport and environmental improvement measures in a tidal bay based on a Lagrangian particle-tracking model." Water Science and Engineering 11, no. 1: 23-38.

Journal article
Published: 01 January 2018 in Journal of Bridge Engineering
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In this paper, a numerical wave-loading model using the dynamic-mesh updating technique is combined with a nonlinear finite-element (FE) model to investigate the behavior of costal bridge superstructures under solitary waves. The numerical model has been tested by comparing it with laboratory experiments performed at Oregon State University. It is proven that the proposed model is reliable for predicting the bridge–wave interaction. Full-scale numerical experiments are then conducted to discuss the effect of vertical flexibility on connection forces. In this study, a typical value of horizontal restraint has been assigned to each bridge deck, and the vertical flexibility is introduced by allowing the bridge deck to rotate about the onshore side. The results show that a higher extent of deck rotation movement is accompanied with larger horizontal resultant forces. Also, the pattern of vertical resultant is significantly influenced, whereas the peak value does not change much. Moreover, the general characteristics of the relationship between the vertical resultant force and the overturning moment are discussed in detail for a vertically fixed deck, and they are represented by interaction diagrams. The direction of the overturning moment is distinguished. The significance of a negative overturning moment is revealed. At the end of the paper, an empirical model for predicting the interaction diagrams is proposed and tested.

ACS Style

Yalong Cai; A. Agrawal; Ke Qu; H. S. Tang. Numerical Investigation of Connection Forces of a Coastal Bridge Deck Impacted by Solitary Waves. Journal of Bridge Engineering 2018, 23, 04017108 .

AMA Style

Yalong Cai, A. Agrawal, Ke Qu, H. S. Tang. Numerical Investigation of Connection Forces of a Coastal Bridge Deck Impacted by Solitary Waves. Journal of Bridge Engineering. 2018; 23 (1):04017108.

Chicago/Turabian Style

Yalong Cai; A. Agrawal; Ke Qu; H. S. Tang. 2018. "Numerical Investigation of Connection Forces of a Coastal Bridge Deck Impacted by Solitary Waves." Journal of Bridge Engineering 23, no. 1: 04017108.

Journal article
Published: 04 September 2017 in Applied Physics Letters
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We developed a flexible force sensor consisting of 3D graphene foam (GF) encapsulated in flexible polydimethylsiloxane (PDMS). Because the 3D GF/PDMS sensor is based on the transformation of an electronic band structure aroused by static mechanical strain or KHz vibration, it can detect frequency signals by both tuning fork tests and piezoelectric ceramic transducer tests, which showed a clear linear response from audio frequencies, including frequencies up to 141 KHz in the ultrasound range. Because of their excellent response with a wide bandwidth, the 3D GF/PDMS sensors are attractive for interactive wearable devices or artificial prosthetics capable of perceiving seismic waves, ultrasonic waves, shock waves, and transient pressures.

ACS Style

R. Xu; H. Zhang; Yichen Cai; J. Ruan; K. Qu; E. Liu; X. Ni; M. Lu; X. Dong. Flexible and wearable 3D graphene sensor with 141 KHz frequency signal response capability. Applied Physics Letters 2017, 111, 103501 .

AMA Style

R. Xu, H. Zhang, Yichen Cai, J. Ruan, K. Qu, E. Liu, X. Ni, M. Lu, X. Dong. Flexible and wearable 3D graphene sensor with 141 KHz frequency signal response capability. Applied Physics Letters. 2017; 111 (10):103501.

Chicago/Turabian Style

R. Xu; H. Zhang; Yichen Cai; J. Ruan; K. Qu; E. Liu; X. Ni; M. Lu; X. Dong. 2017. "Flexible and wearable 3D graphene sensor with 141 KHz frequency signal response capability." Applied Physics Letters 111, no. 10: 103501.

Journal article
Published: 01 July 2017 in Journal of Bridge Engineering
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Air vents in bridge decks are considered one potential measure for mitigating risk of damage to coastal bridges caused by extreme storm surge because they may reduce hydrodynamic uplift loads significantly. This paper presents a systematic, two-dimensional, numerical study on physical phenomena and hydrodynamic loads involved during the impact of solitary waves on a bridge deck with vents. The effects of the opening size of vents and other prominent factors, including submergence of the deck, wave height, water depth, and number of girders, on hydrodynamic loads were investigated through the numerical study. It was found that, when the deck was submerged initially, the vertical loads on the bridge deck achieved their maximum values at a certain opening size of vents, and their magnitudes could be significantly higher than on a deck without vents. Formulas as functions of these factors were developed based on the computational results to estimate efficiency of air vents to reduce hydrodynamic loads on bridge decks.

ACS Style

Ke Qu; H. S. Tang; A. Agrawal; Y. Cai. Hydrodynamic Effects of Solitary Waves Impinging on a Bridge Deck with Air Vents. Journal of Bridge Engineering 2017, 22, 04017024 .

AMA Style

Ke Qu, H. S. Tang, A. Agrawal, Y. Cai. Hydrodynamic Effects of Solitary Waves Impinging on a Bridge Deck with Air Vents. Journal of Bridge Engineering. 2017; 22 (7):04017024.

Chicago/Turabian Style

Ke Qu; H. S. Tang; A. Agrawal; Y. Cai. 2017. "Hydrodynamic Effects of Solitary Waves Impinging on a Bridge Deck with Air Vents." Journal of Bridge Engineering 22, no. 7: 04017024.

Journal article
Published: 01 December 2016 in Journal of Hydrodynamics
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This paper evaluates the SIFOM-FVCOM system recently developed by the authors to simulate multiphysics coastal ocean flow phenomena, especially those at small scales. First, its formulation for buoyancy is examined with regard to solution accuracy and computational efficiency. Then, the system is used to track particles in circulations in the Jamaica Bay, demonstrating that large-scale patterns of trajectories of fluid particles are sensitive to small-scales flows from which they are released. Finally, a simulation is presented to illustrate the SIFOM-FVCOM system's capability, which is beyond the reach of other existing models, to directly and simultaneously model large-scale storm surges as well as small-scale flow structures around bridge piers within the Hudson River during the Hurricane Sandy.

ACS Style

K. Qu; H. S. Tang; A. Agrawal; C. B. Jiang; B. Deng. Evaluation of SIFOM-FVCOM system for high-fidelity simulation of small-scale coastal ocean flows. Journal of Hydrodynamics 2016, 28, 994 -1002.

AMA Style

K. Qu, H. S. Tang, A. Agrawal, C. B. Jiang, B. Deng. Evaluation of SIFOM-FVCOM system for high-fidelity simulation of small-scale coastal ocean flows. Journal of Hydrodynamics. 2016; 28 (6):994-1002.

Chicago/Turabian Style

K. Qu; H. S. Tang; A. Agrawal; C. B. Jiang; B. Deng. 2016. "Evaluation of SIFOM-FVCOM system for high-fidelity simulation of small-scale coastal ocean flows." Journal of Hydrodynamics 28, no. 6: 994-1002.

Conference paper
Published: 02 January 2016 in 54th AIAA Aerospace Sciences Meeting
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ACS Style

Yongqiang Tian; Zhengke Zhang; Qi Zhai; Ke Qu. Numerical Prediction of the Minimum Height of Roughness Strip for Artificial Transition on Swept Wings. 54th AIAA Aerospace Sciences Meeting 2016, 1 .

AMA Style

Yongqiang Tian, Zhengke Zhang, Qi Zhai, Ke Qu. Numerical Prediction of the Minimum Height of Roughness Strip for Artificial Transition on Swept Wings. 54th AIAA Aerospace Sciences Meeting. 2016; ():1.

Chicago/Turabian Style

Yongqiang Tian; Zhengke Zhang; Qi Zhai; Ke Qu. 2016. "Numerical Prediction of the Minimum Height of Roughness Strip for Artificial Transition on Swept Wings." 54th AIAA Aerospace Sciences Meeting , no. : 1.

Book chapter
Published: 01 January 2016 in Meshfree Methods for Partial Differential Equations VIII
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A modeling system is presented for prediction of multiscale and multiphysics coastal ocean processes, and a numerical experiment is made to evaluate its performance. The system is a hybrid of a fully three dimensional fluid dynamics (F3DFD) model and a geophysical fluid dynamics (GFD) model. In particular, it integrates the Solver for Incompressible Flow on Overset Meshes (SIFOM) and the Finite Volume Coastal Ocean Model (FVCOM) using a domain decomposition method implemented with Chimera grids. In the hybrid SIFOM–FVCOM system, SIFOM is employed to capture small-scale local phenomena, and FVCOM is used to simulate large-scale background coastal flows. Simulation of a transient sill flow demonstrates that, while its performance is promising, the hybrid SIFOM–FVCOM system encounters difficulties in correctly resolving the flow at current front where there is strong unsteadiness and thus it needs further improvement.

ACS Style

H. S. Tang; K. Qu; X. G. Wu; Z. K. Zhang. Domain Decomposition for a Hybrid Fully 3D Fluid Dynamics and Geophysical Fluid Dynamics Modeling System: A Numerical Experiment on Transient Sill Flow. Meshfree Methods for Partial Differential Equations VIII 2016, 407 -414.

AMA Style

H. S. Tang, K. Qu, X. G. Wu, Z. K. Zhang. Domain Decomposition for a Hybrid Fully 3D Fluid Dynamics and Geophysical Fluid Dynamics Modeling System: A Numerical Experiment on Transient Sill Flow. Meshfree Methods for Partial Differential Equations VIII. 2016; ():407-414.

Chicago/Turabian Style

H. S. Tang; K. Qu; X. G. Wu; Z. K. Zhang. 2016. "Domain Decomposition for a Hybrid Fully 3D Fluid Dynamics and Geophysical Fluid Dynamics Modeling System: A Numerical Experiment on Transient Sill Flow." Meshfree Methods for Partial Differential Equations VIII , no. : 407-414.

Conference paper
Published: 03 January 2015 in 53rd AIAA Aerospace Sciences Meeting
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ACS Style

Zhengke Zhang; Ke Qu. Numerical Investigation of Transonic Airfoil Buffet Suppression. 53rd AIAA Aerospace Sciences Meeting 2015, 1 .

AMA Style

Zhengke Zhang, Ke Qu. Numerical Investigation of Transonic Airfoil Buffet Suppression. 53rd AIAA Aerospace Sciences Meeting. 2015; ():1.

Chicago/Turabian Style

Zhengke Zhang; Ke Qu. 2015. "Numerical Investigation of Transonic Airfoil Buffet Suppression." 53rd AIAA Aerospace Sciences Meeting , no. : 1.

Journal article
Published: 01 September 2014 in Journal of Computational Physics
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ACS Style

H.S. Tang; K. Qu; X.G. Wu. An overset grid method for integration of fully 3D fluid dynamics and geophysics fluid dynamics models to simulate multiphysics coastal ocean flows. Journal of Computational Physics 2014, 273, 548 -571.

AMA Style

H.S. Tang, K. Qu, X.G. Wu. An overset grid method for integration of fully 3D fluid dynamics and geophysics fluid dynamics models to simulate multiphysics coastal ocean flows. Journal of Computational Physics. 2014; 273 ():548-571.

Chicago/Turabian Style

H.S. Tang; K. Qu; X.G. Wu. 2014. "An overset grid method for integration of fully 3D fluid dynamics and geophysics fluid dynamics models to simulate multiphysics coastal ocean flows." Journal of Computational Physics 273, no. : 548-571.

Review article
Published: 01 August 2014 in Renewable and Sustainable Energy Reviews
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In order to facilitate development of tidal power, a high-resolution survey with unprecedentedly fine grids has been made for marine hydrokinetic (MHK) energy at the seashore of New Jersey (NJ) and its neighbor states (Tang, Kraatz, Qu, Chen, Aboobaker, Jiang. High-resolution survey of tidal energy towards power generation and influence of sea-level-rise: a case study at coast of New Jersey, USA. Renewable and Sustainable Energy Reviews 32 (2014), 960–982). As a sequel as well as the finish to this survey, the current paper makes a thorough search for potential sites for actual tidal power generation along the entire shorelines of NJ and partial coast of New York, with special attention to locations near transportation infrastructures, and it evaluates their power density, surface area, water depth, distance to environmentally sensitive zones, etc. A list of 32 top sites are identified along the coastlines, and, among them, 21 sites with total surface area of 13 km2 are located in the nearshore regions of NJ, and many sites are found next to its bridges. Another 10 favorable sites are also picked up near ports, docks, and marinas in NJ. An estimate indicates that 3.95×105 kW of tidal power could be extracted from the 21 sites. Analysis shows that sea-level-rise could substantially change tidal energy at the identified sites, and it is a factor that has to be taken into account in site selection. On the basis of these results, the approaches for a high-resolution survey for MHK energy are summarized and their future development is discussed.

ACS Style

H.S. Tang; K. Qu; G.Q. Chen; S. Kraatz; N. Aboobaker; C.B. Jiang. Potential sites for tidal power generation: A thorough search at coast of New Jersey, USA. Renewable and Sustainable Energy Reviews 2014, 39, 412 -425.

AMA Style

H.S. Tang, K. Qu, G.Q. Chen, S. Kraatz, N. Aboobaker, C.B. Jiang. Potential sites for tidal power generation: A thorough search at coast of New Jersey, USA. Renewable and Sustainable Energy Reviews. 2014; 39 ():412-425.

Chicago/Turabian Style

H.S. Tang; K. Qu; G.Q. Chen; S. Kraatz; N. Aboobaker; C.B. Jiang. 2014. "Potential sites for tidal power generation: A thorough search at coast of New Jersey, USA." Renewable and Sustainable Energy Reviews 39, no. : 412-425.

Review article
Published: 11 February 2014 in Renewable and Sustainable Energy Reviews
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The first and a crucial step in development of tidal power, which is now attracting more and more attention worldwide, is a reliable survey of temporal and spatial distribution of tidal energy along coastlines. This paper first reviews the advance in assessment of tidal energy, in particular marine hydrokinetic (MHK) energy, and discusses involved challenges and necessary approaches, and then it makes a thorough survey as an illustrative case study on distributions and top sites of MHK energy within the Might-Atlantic-Bight (MAB) with emphasis on the New Jersey (NJ) coastlines. In view of the needs in actual development of tidal power generation and sensitivity of tidal power to flow speed, the former being proportional to the third power of the latter, a high-resolution and detailed modeling is desired. Data with best available accuracy for coastlines, bathymetry, tributaries, etc. are used, meshes as fine as 20 m and less for the whole NJ coast are generated, and the unstructured grid finite volume coastal ocean model (FVCOM) and high performance computing (HPC) facilities are employed. Besides comparison with observation data, a series of numerical tests have been made to ensure reliability of the modeling results. A detailed tidal energy distribution and a list of top sites for tidal power are presented. It is shown that indeed sea-level-rise (SLR) affects the tidal energy distribution significantly. With SLR of 0.5 m and 1 m, tidal energy in NJ coastal waters increases by 21% and 43%, respectively, and the number of the top sties tends to decrease along the barrier islands facing the Atlantic Ocean and increase in the Delaware Bay and the Delaware River. On the basis of these results, further discussions are made on future development for accurate assessment of tidal energy.

ACS Style

H.S. Tang; S. Kraatz; K. Qu; G.Q. Chen; N. Aboobaker; C.B. Jiang. High-resolution survey of tidal energy towards power generation and influence of sea-level-rise: A case study at coast of New Jersey, USA. Renewable and Sustainable Energy Reviews 2014, 32, 960 -982.

AMA Style

H.S. Tang, S. Kraatz, K. Qu, G.Q. Chen, N. Aboobaker, C.B. Jiang. High-resolution survey of tidal energy towards power generation and influence of sea-level-rise: A case study at coast of New Jersey, USA. Renewable and Sustainable Energy Reviews. 2014; 32 ():960-982.

Chicago/Turabian Style

H.S. Tang; S. Kraatz; K. Qu; G.Q. Chen; N. Aboobaker; C.B. Jiang. 2014. "High-resolution survey of tidal energy towards power generation and influence of sea-level-rise: A case study at coast of New Jersey, USA." Renewable and Sustainable Energy Reviews 32, no. : 960-982.

Journal article
Published: 01 April 2013 in Ocean Engineering
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ACS Style

H.S. Tang; Simon Kraatz; X.G. Wu; W.L. Cheng; Ke Qu; J. Polly. Coupling of shallow water and circulation models for prediction of multiphysics coastal flows: Method, implementation, and experiment. Ocean Engineering 2013, 62, 56 -67.

AMA Style

H.S. Tang, Simon Kraatz, X.G. Wu, W.L. Cheng, Ke Qu, J. Polly. Coupling of shallow water and circulation models for prediction of multiphysics coastal flows: Method, implementation, and experiment. Ocean Engineering. 2013; 62 ():56-67.

Chicago/Turabian Style

H.S. Tang; Simon Kraatz; X.G. Wu; W.L. Cheng; Ke Qu; J. Polly. 2013. "Coupling of shallow water and circulation models for prediction of multiphysics coastal flows: Method, implementation, and experiment." Ocean Engineering 62, no. : 56-67.