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In the presence of the complex-hydrodynamic phenomenon, the previous studies on wave transmission characteristics behind low-crested submerged breakwaters are still insufficient yet to appropriately understand of their behaviour. Therefore, a reliable prediction through a computational fluid dynamic (CFD) approach of waves across the structure is necessarily required. This paper presents three-dimensional (3D) computational modelling on hydrodynamic performance of narrow crest behind submerged breakwater aimed at gaining a comprehensive insight into the wave transmission coefficient \((K_{t})\) characteristics. Meanwhile, a two-dimensional (2D) analysis has been initially carried out to provide a satisfactory description of the fundamental hydrodynamic phenomena through capturing the patterns of wave surface profile, flow velocity, and wave energy dissipation. In addition, a numerical wave tank model is well developed on the basis of the extended Reynolds Average Navier–Stokes (RANS) solver incorporated with level set algorithm to treat highly nonlinear effects at interface boundary between water, air and porous obstacle. Here, a submerged breakwater called as wave breaker coral restorer (WABCORE) designed by the National Water Research Institute of Malaysia is then employed. Based on the capability of laboratory experiment, the tested wave parameters were properly selected in 1:4 scaled model of the breakwater for wave height ranging from 0.10 to 0.25 m and wave period ranging from 1.5 to 2.5 s, in which correspond to the recorded wave prototype characteristics at Island of Tinggi, Malaysia. Thus, the wave constraints on a regime of small wave height and wavelength were then considered for various relative significant incident wave height, wave steepness, relative structural crest width and water-depth and have been taken into account in the computational simulation of the transmission coefficient \((K_{t})\). The result shows that a good agreement was obtained between numerical and experimental measurements. \(K_{t}\) decreases to less than 0.5 with increasing relative water depth (\(0.40 \le h/d \le 1.00\)) for significant incident wave height (\(0.1338 \le H_s/d \le 0.5547\)), wave steepness (\(0.0164 \le H_s/L \le 0.1303\)), and crest width of breakwater (0.0256 \(\le C_w/L \le 0.0512\)). Detailed investigation suggests that the result is attributed to significant wave transformation in the vicinity of breakwater, especially for higher h/d. Furthermore, the wave absorbing effect of the submerged WABCORE breakwater is markedly better for increased steepness of \({H_{s}}/{L}\) from 0.0292 to 0.0204 at \(h/d=1.00\), which is consistent with the augmented turbulent energy and dissipation shown on CFD visualizations across the breakwater entanglement.
Sheikh Fakhruradzi Abdullah; Ahmad Fitriadhy; Safari Mat Desa. Numerical and experimental investigations of wave transmission behind a submerged WABCORE breakwater in low wave regime. Journal of Ocean Engineering and Marine Energy 2021, 1 -16.
AMA StyleSheikh Fakhruradzi Abdullah, Ahmad Fitriadhy, Safari Mat Desa. Numerical and experimental investigations of wave transmission behind a submerged WABCORE breakwater in low wave regime. Journal of Ocean Engineering and Marine Energy. 2021; ():1-16.
Chicago/Turabian StyleSheikh Fakhruradzi Abdullah; Ahmad Fitriadhy; Safari Mat Desa. 2021. "Numerical and experimental investigations of wave transmission behind a submerged WABCORE breakwater in low wave regime." Journal of Ocean Engineering and Marine Energy , no. : 1-16.
The automated grain sizing technique (AGS) has been widely used to characterize grain size distribution of a channel bed. A handful number of literatures have been made available in portraying the wide range of AGS application for river and coastal studies. However, the accuracy of this technique is subject to further validation and verification. The accuracy of the AGS technique is lessened due to distortions of image, relief, or tilt. This paper discusses the consistency of the AGS technique at different ground sampling distances, and the implementation of correction factors to modify the grain size distribution (GSD) curve of the AGS technique on fine and coarse fractions. Through a discrepancy ratio test, the GSD curve from the AGS technique was compared with those of the conventional sieving and pebble-counting methods. It was observed that relief distortion did not have a significant impact on the GSD curve. However, textural presence in sediment particles led to ‘over-segmentation,’ which complicated the edge detection of an individual particle. The introduction of correction factors, using least square regression equation, was able to correct those errors by reducing and maintaining the discrepancy ratio to 0.688–1.283 for fine fractions, and 0.758–1.125 for coarse fractions.
Mohd Sofiyan Sulaiman; Roslan Zainal Abidin; Nor Azazi Zakaria; Mohammad Fadhli Ahmad; Ahmad Fitriadhy; Ahmad Jusoh. Revisiting the automated grain sizing technique (AGS) for characterizing grain size distribution. International Journal of River Basin Management 2021, 1 -10.
AMA StyleMohd Sofiyan Sulaiman, Roslan Zainal Abidin, Nor Azazi Zakaria, Mohammad Fadhli Ahmad, Ahmad Fitriadhy, Ahmad Jusoh. Revisiting the automated grain sizing technique (AGS) for characterizing grain size distribution. International Journal of River Basin Management. 2021; ():1-10.
Chicago/Turabian StyleMohd Sofiyan Sulaiman; Roslan Zainal Abidin; Nor Azazi Zakaria; Mohammad Fadhli Ahmad; Ahmad Fitriadhy; Ahmad Jusoh. 2021. "Revisiting the automated grain sizing technique (AGS) for characterizing grain size distribution." International Journal of River Basin Management , no. : 1-10.
Overtopping breakwater for energy conversion (OBREC) is integration between breakwater and wave energy converter (WEC) that allows incoming waves to be stored in the reservoir. The higher the overtopping amount collected in a reservoir, the greater the energy generated will be. Hence, most of the overtopping concept has attempted to maximize the inclusion of water in the reservoir by optimizing geometrical parameters, particularly the ramp angle. However, the studies corresponding to ramp shapes geometries have not been adequately reviewed. Most studies only focused on the usage of linear overtopping ramp shape. There is still limited knowledge on the influence of different ramp shape parameters towards the overtopping wave. Thus, this paper aimed to push the border of available knowledge by investigating the influence of the ramp shape parameters to the overtopping wave discharge through simulation and experimenting approaches. Seven different ramp shapes have been tested under Malaysia’s wave condition and a new ramp shape parameter allowing for maximized overtopping wave on OBREC is presented.
M. A. Musa; M. F. Roslan; M. F. Ahmad; A. M. Muzathik; M. A. Mustapa; A. Fitriadhy; M. H. Mohd; M. A. A. Rahman. The Influence of Ramp Shape Parameters on Performance of Overtopping Breakwater for Energy Conversion. Journal of Marine Science and Engineering 2020, 8, 875 .
AMA StyleM. A. Musa, M. F. Roslan, M. F. Ahmad, A. M. Muzathik, M. A. Mustapa, A. Fitriadhy, M. H. Mohd, M. A. A. Rahman. The Influence of Ramp Shape Parameters on Performance of Overtopping Breakwater for Energy Conversion. Journal of Marine Science and Engineering. 2020; 8 (11):875.
Chicago/Turabian StyleM. A. Musa; M. F. Roslan; M. F. Ahmad; A. M. Muzathik; M. A. Mustapa; A. Fitriadhy; M. H. Mohd; M. A. A. Rahman. 2020. "The Influence of Ramp Shape Parameters on Performance of Overtopping Breakwater for Energy Conversion." Journal of Marine Science and Engineering 8, no. 11: 875.
This paper presents a computational fluid dynamics (CFD) simulation to predict thrust coefficient (\({K_T}\)), torque coefficient (\({K_Q}\)) and efficiency (\({\eta }\)) in open-water condition, whilst a hydrodynamic description around the propeller’s blade underlying the rationale behind the results is explained. The effects of propeller revolution (RPM) and number of blades (Z) on the type of B-series have been appropriately taken into account within the range of advance ratio 0.1\({\le }\)J\({\le }\)1.0. The preliminary CFD results for the values of \({K_T}\), \({K_Q}\) and \({\eta }\) showed a good agreement with the open-water test results, in which the percentage of the average discrepancy error is adequately acceptable. In general, the results revealed that the increase of advance ratio was proportional with the values of \({K_T}\), \({K_Q}\) and \({\eta }\). Inversely, the propeller’s efficiency decreases particularly at J > 0.8. Regardless of the propeller’s RPM, the propeller with Z = 3 provides the highest efficiency. The current CFD result is very useful for acquiring an insight related to the fundamental understanding of the propeller properties in open-water condition.
N. Amira Adam; A. Fitriadhy; C. J. Quah; T. Haryanto. Computational analysis on B-series propeller performance in open water. Marine Systems & Ocean Technology 2020, 15, 299 -307.
AMA StyleN. Amira Adam, A. Fitriadhy, C. J. Quah, T. Haryanto. Computational analysis on B-series propeller performance in open water. Marine Systems & Ocean Technology. 2020; 15 (4):299-307.
Chicago/Turabian StyleN. Amira Adam; A. Fitriadhy; C. J. Quah; T. Haryanto. 2020. "Computational analysis on B-series propeller performance in open water." Marine Systems & Ocean Technology 15, no. 4: 299-307.
A floating jetty often experiences several vertical motions i.e., heave and pitch motion responses due to harsh environmental condition. This inherently makes discomfort to everyone during berthing on a floating; and even it potentially leads to loss of life due to falling down into the sea. A preliminary analysis using Computational Fluid Dynamics (CFD) simulation is necessary to be conducted to ensure user’s safety. The CFD analysis focused on the interaction between wave motions and the floating jetty and its effects on the vertical motions. The vertical motions of floating jetty were quantified by the Response Amplitude Operators (RAO). Several effects due to variation of wavelength (λ/L) have been studied. The CFD results revealed that the lower wavelength (λ/Lλ/L) has given results to less heave and pitch motion amplitudes. In general, it is shown that the vertical motion characteristics of the floating jetty predominantly depend on wave properties.
Ahmad Fitriadhy; Universiti Malaysia Terengganu; Amira Adam. CFD ANALYSIS ON VERTICAL MOTION OF A FULL-SCALE FLOATING JETTY. JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 2020, 15, 100 -110.
AMA StyleAhmad Fitriadhy, Universiti Malaysia Terengganu, Amira Adam. CFD ANALYSIS ON VERTICAL MOTION OF A FULL-SCALE FLOATING JETTY. JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT. 2020; 15 (6):100-110.
Chicago/Turabian StyleAhmad Fitriadhy; Universiti Malaysia Terengganu; Amira Adam. 2020. "CFD ANALYSIS ON VERTICAL MOTION OF A FULL-SCALE FLOATING JETTY." JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 15, no. 6: 100-110.
Several different designs and prototypes of ocean current turbines have been tested over recent years. For every design test, emphasis is given to achieving an optimum power output from the flow. In this study, the performance of a Horizontal Axis Ocean Current Turbine (HAOCT) has been investigated using three-dimensional Computational Fluid Dynamics (CFD) simulations for three cases, namely, (1) a turbine without a deflector, (2) a turbine with a deflector, and (3) a turbine with a deflector operating at a higher fluid depth. The turbine design was modeled in DesignModeler software and simulations were carried out in commercial CFD software Flow-3D. The Torque Coefficient (Cm) and Power Coefficient (Cp) for the turbine have been investigated for a certain range of Tip-Speed Ratios (TSRs) in a flow velocity of 0.7 m/s. Furthermore, comparisons have been made to demonstrate the effect of the deflector on the performance of the turbine and the influence of a higher fluid pressure on the same. The results from the simulations indicate that the higher value of Cp was achieved for Case 2 as compared to the other two cases. The findings from the study indicate that the use of the deflector enhances the performance of the turbine. Furthermore, a higher fluid pressure acting on the turbine has a significant effect on its performance.
Nauman Riyaz Maldar; Cheng Yee Ng; Lee Woen Ean; Elif Oguz; Ahmad Fitriadhy; Hooi Siang Kang. A Comparative Study on the Performance of a Horizontal Axis Ocean Current Turbine Considering Deflector and Operating Depths. Sustainability 2020, 12, 3333 .
AMA StyleNauman Riyaz Maldar, Cheng Yee Ng, Lee Woen Ean, Elif Oguz, Ahmad Fitriadhy, Hooi Siang Kang. A Comparative Study on the Performance of a Horizontal Axis Ocean Current Turbine Considering Deflector and Operating Depths. Sustainability. 2020; 12 (8):3333.
Chicago/Turabian StyleNauman Riyaz Maldar; Cheng Yee Ng; Lee Woen Ean; Elif Oguz; Ahmad Fitriadhy; Hooi Siang Kang. 2020. "A Comparative Study on the Performance of a Horizontal Axis Ocean Current Turbine Considering Deflector and Operating Depths." Sustainability 12, no. 8: 3333.
The lateral separation ratio (S/D) between the twin pontoons of a floating breakwater (TPFB) is one of the prominent factors that attenuate wave energy transmission and reflection. In fact, a numerical investigation of optimum TPFB S/D is inevitably required. To accommodate such a requirement, a numerical optimization model of a genetic algorithm (GA) was developed to assess the optimum S/D primarily through minimizing wave transmission (Kt) and reflection coefficients (Kr) while maximizing the energy dissipation coefficient (Kd). Several parameters, such as wavelengths and S/D ratios including a set of optimization criteria, were taken into account in the simulation, where the optimum solution was then selected from various populations. In addition to the current GA simulation, the optimum S/D was evaluated and quantified by the values of Kt, Kr, and Kd, in which the reduction of some flow parameters was visualized via computational fluid dynamics. The results revealed that the GA simulation is effectively capable of determining global trade-offs between Kt, Kr, and Kd. As compared with the existing model, Kt and Kr decreased to less than 0.3 and 0.4, respectively, whereas Kd increased up to 0.9, resulting in optimum TPFB hydrodynamic performance. Hence, the elaboration of this optimization algorithm can serve as a conceptual design to find an optimum S/D for the twin pontoons of a floating breakwater.
S. F. Abdullah; Ahmad Fitriadhy. Application of Genetic Algorithm for Optimum Hydrodynamic Performance of Twin Pontoon Floating Breakwater. Journal of Waterway, Port, Coastal, and Ocean Engineering 2020, 146, 04019040 .
AMA StyleS. F. Abdullah, Ahmad Fitriadhy. Application of Genetic Algorithm for Optimum Hydrodynamic Performance of Twin Pontoon Floating Breakwater. Journal of Waterway, Port, Coastal, and Ocean Engineering. 2020; 146 (2):04019040.
Chicago/Turabian StyleS. F. Abdullah; Ahmad Fitriadhy. 2020. "Application of Genetic Algorithm for Optimum Hydrodynamic Performance of Twin Pontoon Floating Breakwater." Journal of Waterway, Port, Coastal, and Ocean Engineering 146, no. 2: 04019040.
Since the attribute of wave energy transmission is susceptible to lateral separation (S/D) between twin pontoons of floating breakwater, employing improper S/D may cause ineffective attenuation in the amount of wave energy. This paper presents a numerical optimization modelling aimed at obtaining the optimum S/D through Genetic Algorithm (GA) approach. The artificial intelligence is primarily employed to minimize transmission of wave energy coefficients ( ) whereas maximize energy dissipation coefficient ( ). To achieve such demand, a numerical simulation implementing a MATLAB code as an interface between the Genetic Algorithm and a CFD program is applied. Several parameters for the effects of various wavelengths and ratios of S/D including a set of criteria have been considered in the simulation, where the optimum solution is chosen from various populations. The results demonstrated that the current GA analysis is efficient that can search a global trade-offs between and to determine an optimum S/D. The was minimized to less than 0.3 as compared to existing model ( ) while maximizing to greater than 0.95. Hence, the optimisation algorithm can serve as a useful engineering tool for a conceptual design to determine an optimum S/D for twin pontoons of floating breakwater.
Ahmad Fitriadhy; S. F. Abdullah; M. Hairil; M. F. Ahmad; A. Jusoh. Optimized modelling on lateral separation of twin pontoon-net floating breakwater. Journal of Mechanical Engineering and Sciences 2019, 13, 5764 -5779.
AMA StyleAhmad Fitriadhy, S. F. Abdullah, M. Hairil, M. F. Ahmad, A. Jusoh. Optimized modelling on lateral separation of twin pontoon-net floating breakwater. Journal of Mechanical Engineering and Sciences. 2019; 13 (4):5764-5779.
Chicago/Turabian StyleAhmad Fitriadhy; S. F. Abdullah; M. Hairil; M. F. Ahmad; A. Jusoh. 2019. "Optimized modelling on lateral separation of twin pontoon-net floating breakwater." Journal of Mechanical Engineering and Sciences 13, no. 4: 5764-5779.
F Mahmuddin; S Ramadhan; Ahmad Fitriadhy; S Klara. Performance Comparison Between Ellipse and Circular Intake Shapes of Propeller Flow Cooling System (PFCS) with Numerical and Experimental Methods. IOP Conference Series: Materials Science and Engineering 2019, 676, 1 .
AMA StyleF Mahmuddin, S Ramadhan, Ahmad Fitriadhy, S Klara. Performance Comparison Between Ellipse and Circular Intake Shapes of Propeller Flow Cooling System (PFCS) with Numerical and Experimental Methods. IOP Conference Series: Materials Science and Engineering. 2019; 676 ():1.
Chicago/Turabian StyleF Mahmuddin; S Ramadhan; Ahmad Fitriadhy; S Klara. 2019. "Performance Comparison Between Ellipse and Circular Intake Shapes of Propeller Flow Cooling System (PFCS) with Numerical and Experimental Methods." IOP Conference Series: Materials Science and Engineering 676, no. : 1.
This paper presents a comparison with experimental data of CFRP confined concrete column damage. The study investigates the behaviour of CFRP confined concrete beams against the experimental results. It also investigates the influence of different parameters on the behaviour of the FRP confined concrete column. The ABAQUS code was used to develop finite element models for simulation of the damage behaviour of the beams. The concrete was modelled using a plastic-damage model which is a perfect bond model and were evaluated for the concrete-FRP confinement interface. The results showed that when the thickness of carbon-fibre reinforced plastics (CFRP) proportional to the load capacity of the beam for both shear and compressive strength. The maximum load increases with an incremental of CFRP thickness. From the simulation results, the load- deflection relationships have been analysed and the FEM results agreed well with the experiments data. Finally, the study shows that the differences between the results of finite element analysis and experimental tests are in an acceptable range.
Z Z Mukhtar; A H H AbWahid; A A Bakar; Ahmad Fitriadhy; Mohd Shukry Abdul Majid; A M Saat. Ultimate strength analysis of CFRP confined concrete using finite element method (FEM). IOP Conference Series: Materials Science and Engineering 2019, 670, 012005 .
AMA StyleZ Z Mukhtar, A H H AbWahid, A A Bakar, Ahmad Fitriadhy, Mohd Shukry Abdul Majid, A M Saat. Ultimate strength analysis of CFRP confined concrete using finite element method (FEM). IOP Conference Series: Materials Science and Engineering. 2019; 670 (1):012005.
Chicago/Turabian StyleZ Z Mukhtar; A H H AbWahid; A A Bakar; Ahmad Fitriadhy; Mohd Shukry Abdul Majid; A M Saat. 2019. "Ultimate strength analysis of CFRP confined concrete using finite element method (FEM)." IOP Conference Series: Materials Science and Engineering 670, no. 1: 012005.
In marine industry, current practice shows that composite materials already being used in a number of marine structures such as high and low-pressure tubing, bridge and jetty as well as accommodation modules for offshore structures. Fiber Reinforced Plastic (FRP) confined concrete has been widely accepted in the inland construction technology as a way to reduce cost. This method seems feasible as steel structure can be filled by concrete and confined by FRP for underwater application. This study concentrates on FRP confined concrete cylindrical column specimen under axial compressive loading and Vacuum In Fusion method has been applied for FRP confinement process. The testing results showed that cylindrical column which is properly confined by FRP confinement can achieve high levels of strength and ductility if compared to those of plain concrete. Results confirmed that external confinement produced by FRP can significantly enhanced compressive strength, ductility and energy absorption capacity. The highest compressive strength is 29.32 Mpa for 1.5 mm FRP confinement and it is about 56% higher than compressive strength of specimen without FRP confinement. Stress-strain relationship, ultimate strength and ductility of specimens are analysed in detail based on experimental results.
Z. Z. Mukhtar; A. Abu Bakar; Ahmad Fitriadhy; Mohd Shukry Abdul Majid; Asmalina Mohamed Saat. Experimental Analysis of FRP Confined Concrete for Underwater Application. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) 2019, 65 -77.
AMA StyleZ. Z. Mukhtar, A. Abu Bakar, Ahmad Fitriadhy, Mohd Shukry Abdul Majid, Asmalina Mohamed Saat. Experimental Analysis of FRP Confined Concrete for Underwater Application. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020). 2019; ():65-77.
Chicago/Turabian StyleZ. Z. Mukhtar; A. Abu Bakar; Ahmad Fitriadhy; Mohd Shukry Abdul Majid; Asmalina Mohamed Saat. 2019. "Experimental Analysis of FRP Confined Concrete for Underwater Application." Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) , no. : 65-77.
Ahmad Fitriadhy; A.M.A. Malek. Computational fluid dynamics analysis of a ship’s side launching in restricted waters. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 2017, 11, 2993 -3003.
AMA StyleAhmad Fitriadhy, A.M.A. Malek. Computational fluid dynamics analysis of a ship’s side launching in restricted waters. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES. 2017; 11 (4):2993-3003.
Chicago/Turabian StyleAhmad Fitriadhy; A.M.A. Malek. 2017. "Computational fluid dynamics analysis of a ship’s side launching in restricted waters." JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 11, no. 4: 2993-3003.
Ahmad Fitriadhy; M.A. Faiz; S.F. Abdullah. Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 2017, 11, 3072 -3085.
AMA StyleAhmad Fitriadhy, M.A. Faiz, S.F. Abdullah. Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES. 2017; 11 (4):3072-3085.
Chicago/Turabian StyleAhmad Fitriadhy; M.A. Faiz; S.F. Abdullah. 2017. "Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport." JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 11, no. 4: 3072-3085.
S.F. Abdullah; Ahmad Fitriadhy; M. Hairil; A. Jusoh. Hydrodynamic performance of cylindrical floating breakwater in waves. International Journal of Automotive and Mechanical Engineering 2017, 14, 4715 -4729.
AMA StyleS.F. Abdullah, Ahmad Fitriadhy, M. Hairil, A. Jusoh. Hydrodynamic performance of cylindrical floating breakwater in waves. International Journal of Automotive and Mechanical Engineering. 2017; 14 (4):4715-4729.
Chicago/Turabian StyleS.F. Abdullah; Ahmad Fitriadhy; M. Hairil; A. Jusoh. 2017. "Hydrodynamic performance of cylindrical floating breakwater in waves." International Journal of Automotive and Mechanical Engineering 14, no. 4: 4715-4729.
Ahmad Fitriadhy; M.K. Aswad; N. Adlina Aldin; N. Aqilah Mansor; A.A. Bakar; W.B. Wan Nik. Computational fluid dynamics analysis on the course stability of a towed ship. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 2017, 11, 2919 -2929.
AMA StyleAhmad Fitriadhy, M.K. Aswad, N. Adlina Aldin, N. Aqilah Mansor, A.A. Bakar, W.B. Wan Nik. Computational fluid dynamics analysis on the course stability of a towed ship. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES. 2017; 11 (3):2919-2929.
Chicago/Turabian StyleAhmad Fitriadhy; M.K. Aswad; N. Adlina Aldin; N. Aqilah Mansor; A.A. Bakar; W.B. Wan Nik. 2017. "Computational fluid dynamics analysis on the course stability of a towed ship." JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 11, no. 3: 2919-2929.
Ahmad Fitriadhy; N. Amira Adam. Heave and pitch motions performance of a monotricat ship in head-seas. International Journal of Automotive and Mechanical Engineering 2017, 14, 4243 -4258.
AMA StyleAhmad Fitriadhy, N. Amira Adam. Heave and pitch motions performance of a monotricat ship in head-seas. International Journal of Automotive and Mechanical Engineering. 2017; 14 (2):4243-4258.
Chicago/Turabian StyleAhmad Fitriadhy; N. Amira Adam. 2017. "Heave and pitch motions performance of a monotricat ship in head-seas." International Journal of Automotive and Mechanical Engineering 14, no. 2: 4243-4258.
Ahmad Fitriadhy; S. A. Azmi; N. Aqilah Mansor; N. Adlina Aldin. Computational fluid dynamics investigation on total resistance coefficient of a high-speed “deep-V” catamaran in shallow water. International Journal of Automotive and Mechanical Engineering 2017, 14, 4369 -4382.
AMA StyleAhmad Fitriadhy, S. A. Azmi, N. Aqilah Mansor, N. Adlina Aldin. Computational fluid dynamics investigation on total resistance coefficient of a high-speed “deep-V” catamaran in shallow water. International Journal of Automotive and Mechanical Engineering. 2017; 14 (2):4369-4382.
Chicago/Turabian StyleAhmad Fitriadhy; S. A. Azmi; N. Aqilah Mansor; N. Adlina Aldin. 2017. "Computational fluid dynamics investigation on total resistance coefficient of a high-speed “deep-V” catamaran in shallow water." International Journal of Automotive and Mechanical Engineering 14, no. 2: 4369-4382.
Ahmad Fitriadhy; N.S. Razali; N. AqilahMansor. Seakeeping performance of a rounded hull catamaran in waves using CFD approach. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 2017, 11, 2601 -2614.
AMA StyleAhmad Fitriadhy, N.S. Razali, N. AqilahMansor. Seakeeping performance of a rounded hull catamaran in waves using CFD approach. JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES. 2017; 11 (2):2601-2614.
Chicago/Turabian StyleAhmad Fitriadhy; N.S. Razali; N. AqilahMansor. 2017. "Seakeeping performance of a rounded hull catamaran in waves using CFD approach." JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES 11, no. 2: 2601-2614.
Oil and gas production in subsea operation continues to the extreme depth. Harsh environment and severe operation of oil and gas transportation due to high pressure and temperature become crucial for pipeline transportation. Consequently, The pipelines will deform to buckle shape which affect to integrity of pipeline. This phenomenon should be considered in design of pipeline to provide reliability of pipeline operation during time life period. The design result of pipelines is according to DNV F 101 whereas the magnitude of pipeline curvature will validate by ANSYS 14 to ensure pipeline reliability.
J. Abdul Khair; Koto Jaswar; Affis Effendi; Ahmad Fitriadhy. Buckling Criteria for Subsea Pipeline. Jurnal Teknologi 2015, 74, 1 .
AMA StyleJ. Abdul Khair, Koto Jaswar, Affis Effendi, Ahmad Fitriadhy. Buckling Criteria for Subsea Pipeline. Jurnal Teknologi. 2015; 74 (5):1.
Chicago/Turabian StyleJ. Abdul Khair; Koto Jaswar; Affis Effendi; Ahmad Fitriadhy. 2015. "Buckling Criteria for Subsea Pipeline." Jurnal Teknologi 74, no. 5: 1.
Ahmad Fitriadhy; H. Yasukawa; A. Maimun. Theoretical and experimental analysis of a slack towline motion on tug-towed ship during turning. Ocean Engineering 2015, 99, 95 -106.
AMA StyleAhmad Fitriadhy, H. Yasukawa, A. Maimun. Theoretical and experimental analysis of a slack towline motion on tug-towed ship during turning. Ocean Engineering. 2015; 99 ():95-106.
Chicago/Turabian StyleAhmad Fitriadhy; H. Yasukawa; A. Maimun. 2015. "Theoretical and experimental analysis of a slack towline motion on tug-towed ship during turning." Ocean Engineering 99, no. : 95-106.