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In this paper, trend detection of wave parameters such as significant wave height, energy period, and wave power along the Italian seas was carried out. To this purpose, wave time series in the period 1979–2018 taken from the global atmospheric reanalysis ERA-Interim by European Center for Medium-Range Weather Forecasts (ECMWF) were considered. Choosing a significance level equal to 90%, the use of the Mann–Kendall test allowed estimating ongoing trends on the mean values evaluated at yearly and seasonal scale. Furthermore, the assessment of the magnitude of the increase/decrease of the wave parameters was performed through the Theil–Sen estimator. The obtained results underlined that the mean values of the considered wave parameters were characterized by a high occurrence of positive trends in the different Italian seas. The findings of this study could have implications for studies of coastal flooding, shoreline variations, and port operations, and for the assessment of the performances of Wave Energy Converters.
Tommaso Caloiero; Francesco Aristodemo. Trend Detection of Wave Parameters along the Italian Seas. Water 2021, 13, 1634 .
AMA StyleTommaso Caloiero, Francesco Aristodemo. Trend Detection of Wave Parameters along the Italian Seas. Water. 2021; 13 (12):1634.
Chicago/Turabian StyleTommaso Caloiero; Francesco Aristodemo. 2021. "Trend Detection of Wave Parameters along the Italian Seas." Water 13, no. 12: 1634.
Among one of the most challenging engineering problems, fluid-structure interaction processes are complex phenomena that have received much attention over the years
Francesco Aristodemo; Marcello Di Risio. Wave-Structure Interaction Processes in Coastal Engineering. Water 2021, 13, 831 .
AMA StyleFrancesco Aristodemo, Marcello Di Risio. Wave-Structure Interaction Processes in Coastal Engineering. Water. 2021; 13 (6):831.
Chicago/Turabian StyleFrancesco Aristodemo; Marcello Di Risio. 2021. "Wave-Structure Interaction Processes in Coastal Engineering." Water 13, no. 6: 831.
The submerged hydraulic jump is a sudden change from the supercritical to subcritical flow, specified by strong turbulence, air entrainment and energy loss. Despite recent studies, hydraulic jump characteristics in smooth and rough beds, the turbulence, the mean velocity and the flow patterns in the cavity region of a submerged hydraulic jump in the rough beds, especially in the case of triangular macroroughnesses, are not completely understood. The objective of this paper was to numerically investigate via the FLOW-3D model the effects of triangular macroroughnesses on the characteristics of submerged jump, including the longitudinal profile of streamlines, flow patterns in the cavity region, horizontal velocity profiles, streamwise velocity distribution, thickness of the inner layer, bed shear stress coefficient, Turbulent Kinetic Energy (TKE) and energy loss, in different macroroughness arrangements and various inlet Froude numbers (1.7 < Fr1< 9.3). To verify the accuracy and reliability of the present numerical simulations, literature experimental data were considered.
Amir Ghaderi; Mehdi Dasineh; Francesco Aristodemo; Costanza Aricò. Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses. Water 2021, 13, 674 .
AMA StyleAmir Ghaderi, Mehdi Dasineh, Francesco Aristodemo, Costanza Aricò. Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses. Water. 2021; 13 (5):674.
Chicago/Turabian StyleAmir Ghaderi; Mehdi Dasineh; Francesco Aristodemo; Costanza Aricò. 2021. "Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses." Water 13, no. 5: 674.
We present an analysis related to the evaluation of Morison and transverse force coefficients in the case of a submerged square barrier subject to the action of solitary waves. To this purpose, two-dimensional experimental research was undertaken in the wave flume of the University of Calabria, in which a rigid square barrier was provided by a discrete battery of pressure sensors to determine the horizontal and vertical hydrodynamic forces. A total set of 18 laboratory tests was carried out by varying the motion law of a piston-type paddle. Owing to the low Keulegan–Carpenter numbers of the tests, the force regime of the physical tests was defined by the dominance of the inertia loads in the horizontal direction and of the lift loads in the vertical one. Through the use of the time series of wave forces and the undisturbed kinematics, drag, horizontal inertia, lift, and vertical inertia coefficients in the Morison and transverse semi-empirical schemes were calculated using time-domain approaches, adopting the WLS1 method for the minimization of the difference between the maximum forces and the linked phase shifts by comparing laboratory and calculated wave loads. Practical equations to calculate these coefficients as a function of the wave non-linearity were introduced. The obtained results highlighted the prevalence of the horizontal forces in comparison with the vertical ones which, however, prove to be fundamental for stability purposes of the barrier. An overall good agreement between the experimental forces and those calculated by the calibrated semi-empirical schemes was found, particularly for the positive horizontal and vertical loads. The analysis of the hydrodynamic coefficients showed a decreasing trend for the drag, horizontal inertia, and lift coefficients as a function of the wave non-linearity, while the vertical inertia coefficient underlined an initial increasing trend and a successive slight decreasing trend.
Francesco Aristodemo; Giuseppe Tripepi; Luana Gurnari; Pasquale Filianoti. Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves. Water 2021, 13, 315 .
AMA StyleFrancesco Aristodemo, Giuseppe Tripepi, Luana Gurnari, Pasquale Filianoti. Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves. Water. 2021; 13 (3):315.
Chicago/Turabian StyleFrancesco Aristodemo; Giuseppe Tripepi; Luana Gurnari; Pasquale Filianoti. 2021. "Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves." Water 13, no. 3: 315.
Calabria is a region of southern Italy characterized by several natural and heritage sites located on seaboard areas, within a distance of 300 m from the coast. In fact, 58 Natura 2000 sites and 63 cultural heritage sites (42.9% of which overlap with the Natura 2000 ones) fall within the borders of the region. Within this context, this study has analyzed the connection between natural and cultural goods in the region, considering both seaboard and human impact risk conditions. The results evidenced that 50% and 21% of the natural and cultural heritage sites, respectively, are exposed to the risk of increasing coastal erosion and heavy human impact. Moreover, in order to highlight how cultural heritage sites could be integrated into natural ones within a process of global coastal area management, three case studies have been discussed. In fact, a new kind of approach to coastal regions through an Integrated Coastal Zone Management is necessary in order to valorize the natural and cultural heritage of coastal regions for the social and economic growth of local people.
Nicola Cantasano; Tommaso Caloiero; Gaetano Pellicone; Francesco Aristodemo; Alessandra De Marco; Giuseppe Tagarelli. Can ICZM Contribute to the Mitigation of Erosion and of Human Activities Threatening the Natural and Cultural Heritage of the Coastal Landscape of Calabria? Sustainability 2021, 13, 1122 .
AMA StyleNicola Cantasano, Tommaso Caloiero, Gaetano Pellicone, Francesco Aristodemo, Alessandra De Marco, Giuseppe Tagarelli. Can ICZM Contribute to the Mitigation of Erosion and of Human Activities Threatening the Natural and Cultural Heritage of the Coastal Landscape of Calabria? Sustainability. 2021; 13 (3):1122.
Chicago/Turabian StyleNicola Cantasano; Tommaso Caloiero; Gaetano Pellicone; Francesco Aristodemo; Alessandra De Marco; Giuseppe Tagarelli. 2021. "Can ICZM Contribute to the Mitigation of Erosion and of Human Activities Threatening the Natural and Cultural Heritage of the Coastal Landscape of Calabria?" Sustainability 13, no. 3: 1122.
The paper describes the development of a hardware/software system for the space-time detection of the free surface of water, produced by the movement of waves, and of the relative mass transport. The first tests of the system were performed using the wave channel of the Laboratorio Grandi Modelli Idraulici of the Department of Civil Engineering of the University of Calabria, equipped with hardware/software tools for generating and measuring water waves. The first version of the system designed and developed uses three cameras positioned appropriately, so as to cover the entire length of the generated waves. The acquisitions of the video cameras are synchronized via software using an ad-hoc code. Raspberry pi 8 MP cameras were used, mounted on as many Raspberry Pi microcomputers, and full HD videos (1920 × 1080) were acquired. The management features of the processors made it necessary to set up an ad-hoc code for the synchronization of the frames. The free surface is represented as Dense Digital Surface Model using Dense Image Matching techniques. Due to the size of the wave channel, in the perspective of use for large lengths, low-cost cameras were used, with lenses characterized by high distortions.
Serena Artese; Michele Perrelli; Giuseppe Tripepi; Francesco Aristodemo. Dynamic Measurement of Water Waves in a Wave Channel Based on Low-Cost Photogrammetry: Description of the System and First Results. Communications in Computer and Information Science 2020, 198 -210.
AMA StyleSerena Artese, Michele Perrelli, Giuseppe Tripepi, Francesco Aristodemo. Dynamic Measurement of Water Waves in a Wave Channel Based on Low-Cost Photogrammetry: Description of the System and First Results. Communications in Computer and Information Science. 2020; ():198-210.
Chicago/Turabian StyleSerena Artese; Michele Perrelli; Giuseppe Tripepi; Francesco Aristodemo. 2020. "Dynamic Measurement of Water Waves in a Wave Channel Based on Low-Cost Photogrammetry: Description of the System and First Results." Communications in Computer and Information Science , no. : 198-210.
An accurate measurement campaign, carried out on a confined porous aquifer, expressly reproduced in laboratory, allowed the determining of hydraulic conductivity values by performing a series of slug tests. This was done for four porous medium configurations with different granulometric compositions. At the scale considered, intermediate between those of the laboratory and the field, the scalar behaviors of the hydraulic conductivity and the effective porosity was verified, determining the respective scaling laws. Moreover, assuming the effective porosity as scale parameter, the scaling laws of the hydraulic conductivity were determined for the different injection volumes of the slug test, determining a new relationship, valid for coarse-grained porous media. The results obtained allow the influence that the differences among the characteristics of the porous media considered exerted on the scaling laws obtained to be highlighted. Finally, a comparison was made with the results obtained in a previous investigation carried out at the field scale.
Carmine Fallico; Agostino Lauria; Francesco Aristodemo. Porous Medium Typology Influence on the Scaling Laws of Confined Aquifer Characteristic Parameters. Water 2020, 12, 1166 .
AMA StyleCarmine Fallico, Agostino Lauria, Francesco Aristodemo. Porous Medium Typology Influence on the Scaling Laws of Confined Aquifer Characteristic Parameters. Water. 2020; 12 (4):1166.
Chicago/Turabian StyleCarmine Fallico; Agostino Lauria; Francesco Aristodemo. 2020. "Porous Medium Typology Influence on the Scaling Laws of Confined Aquifer Characteristic Parameters." Water 12, no. 4: 1166.
A laboratory and numerical investigation on the features of the horizontal and vertical hydrodynamic loads given by a solitary wave on a submerged square barrier is presented. By the experimental viewpoint, the wave forces were deduced from the records of a discrete battery of pressure sensors located along the external surface of the barrier. As regards the numerical viewpoint, simulations were performed through the SPH model presented in Di Mascio et al. (2017), in which the governing equations are written considering a turbulence closure model. The numerical simulations allowed to extend the range of analyzed cases and highlighted the regions around the submerged barrier of higher dissipation occurring during the wave-structure interaction. A good agreement between the experimental and numerical peaks of the horizontal and vertical forces was found. Afterwards, a semi-analytical scheme able to determine the horizontal loads was adopted using the speed drop factor obtained by physical tests and simulations. For practical purposes, attention was finally paid to determine the critical conditions against the sliding of the barrier.
Giuseppe Tripepi; Francesco Aristodemo; Domenico Davide Meringolo; Luana Gurnari; Pasquale Filianoti. Hydrodynamic forces induced by a solitary wave interacting with a submerged square barrier: Physical tests and δ-LES-SPH simulations. Coastal Engineering 2020, 158, 103690 .
AMA StyleGiuseppe Tripepi, Francesco Aristodemo, Domenico Davide Meringolo, Luana Gurnari, Pasquale Filianoti. Hydrodynamic forces induced by a solitary wave interacting with a submerged square barrier: Physical tests and δ-LES-SPH simulations. Coastal Engineering. 2020; 158 ():103690.
Chicago/Turabian StyleGiuseppe Tripepi; Francesco Aristodemo; Domenico Davide Meringolo; Luana Gurnari; Pasquale Filianoti. 2020. "Hydrodynamic forces induced by a solitary wave interacting with a submerged square barrier: Physical tests and δ-LES-SPH simulations." Coastal Engineering 158, no. : 103690.
An analysis of a 40-year long wave time series was performed, along the coasts of Italy, in order to identify ongoing trends of two synthetic parameters, significant wave height (Hs) and energy period (Te), and of the wave power (P). First, wave data were deduced from the global atmospheric reanalysis ERA-INTERIM by the ECMWF and checked to verify their consistency. Then, a trend analysis was performed on mean values evaluated at annual and seasonal scales through the non-parametric Mann–Kendall test for three different significance levels equal to 90%, 95% and 99%. The obtained results could be useful for analyses linked to beach morphodynamics and on the identification of field installations of Wave Energy Converters (WECs).
Tommaso Caloiero; Francesco Aristodemo; Danilo Algieri Ferraro. Changes of Significant Wave Height, Energy Period and Wave Power in Italy in the Period 1979–2018. Environmental Sciences Proceedings 2020, 2, 3 .
AMA StyleTommaso Caloiero, Francesco Aristodemo, Danilo Algieri Ferraro. Changes of Significant Wave Height, Energy Period and Wave Power in Italy in the Period 1979–2018. Environmental Sciences Proceedings. 2020; 2 (1):3.
Chicago/Turabian StyleTommaso Caloiero; Francesco Aristodemo; Danilo Algieri Ferraro. 2020. "Changes of Significant Wave Height, Energy Period and Wave Power in Italy in the Period 1979–2018." Environmental Sciences Proceedings 2, no. 1: 3.
The present study describes an experimental and numerical investigation on the horizontal and vertical hydrodynamic forces given by solitary waves on horizontal circular cylinders placed near a rigid horizontal bed. The experimental campaign was conducted in the wave channel of the University of Calabria in which twelve pressure sensors were installed along the external surface of a cylinder located at gap-to-diameter ratios equal to 0.25 and 0.1. The numerical modeling was carried out using the open source OlaFlow model, based on the OpenFOAM solver, in order to simulate the wave forces, also extending the range of experiments. The resulting force field was defined by the dominance of the horizontal inertia force along the flow direction and by the lift force along the transversal one. The values of the hydrodynamic forces and the free stream kinematics were adopted to calibrate the hydrodynamic coefficients (drag, lift and horizontal and vertical inertia) involved in the Morison formula and in a proposed version of the transverse equation through the use of the weighted least square approach. For practical aims, semi-analytical relationships to determine the hydrodynamic coefficients as a function of wave amplitude and water depth are presented.
Francesco Aristodemo; Giuseppe Tripepi; Danilo Algieri Ferraro; Paolo Veltri. An experimental and numerical study on solitary wave loads at cylinders near the bed. Ocean Engineering 2019, 195, 106747 .
AMA StyleFrancesco Aristodemo, Giuseppe Tripepi, Danilo Algieri Ferraro, Paolo Veltri. An experimental and numerical study on solitary wave loads at cylinders near the bed. Ocean Engineering. 2019; 195 ():106747.
Chicago/Turabian StyleFrancesco Aristodemo; Giuseppe Tripepi; Danilo Algieri Ferraro; Paolo Veltri. 2019. "An experimental and numerical study on solitary wave loads at cylinders near the bed." Ocean Engineering 195, no. : 106747.
A filtering analysis of hydraulic head data deduced from slug tests injected in a confined aquifer with different porous media is proposed. Experimental laboratory tests were conducted in a large-scale physical model developed at the University of Calabria. The hydraulic head data were deduced from the records of a pressure sensor arranged in the injection well and subjected to a processing operation to filter the high-frequency noise. The involved smoothing techniques are the Fourier transform and two types of wavelet transform. The performances of the filtered hydraulic heads were examined for different slug volumes and four model layouts in terms of optimal fitting of the Cooper’s analytical solution. The hydraulic head variations in the confined aquifer were analyzed using wavelet transform in order to discover their energy contributions and frequency oscillations. Finally, the raw and smoothed hydraulic heads were adopted to calculate the hydraulic conductivity of the aquifer.
Francesco Aristodemo; Agostino Lauria; Giuseppe Tripepi; Maria Fernanda Rivera-Velasquéz; Carmine Fallico; Rivera- Velasquéz. Smoothing of Slug Tests for Laboratory Scale Aquifer Assessment—A Comparison Among Different Porous Media. Water 2019, 11, 1569 .
AMA StyleFrancesco Aristodemo, Agostino Lauria, Giuseppe Tripepi, Maria Fernanda Rivera-Velasquéz, Carmine Fallico, Rivera- Velasquéz. Smoothing of Slug Tests for Laboratory Scale Aquifer Assessment—A Comparison Among Different Porous Media. Water. 2019; 11 (8):1569.
Chicago/Turabian StyleFrancesco Aristodemo; Agostino Lauria; Giuseppe Tripepi; Maria Fernanda Rivera-Velasquéz; Carmine Fallico; Rivera- Velasquéz. 2019. "Smoothing of Slug Tests for Laboratory Scale Aquifer Assessment—A Comparison Among Different Porous Media." Water 11, no. 8: 1569.
The Mediterranean Sea is subject to significant and variable climatic changes. In this work, an analysis of a 39-year-long wave time series was performed in order to identify ongoing trends of two synthetic parameters, significant wave height and energy period, along the coasts of the Calabria region (southern Italy). First, wave data were acquired from the global atmospheric reanalysis data set European Centre for Medium-Range Weather Forecasts Re-Analysis Interim (ERA-Interim) and were processed in order to check their quality. Then, the data were subject to a geographical transposition method in order to transfer the wave parameters at a representative water depth of 100 m. Finally, trend analyses have been performed using the nonparametric Mann–Kendall (MK) test and a graphical technique, the Innovative Trend Analysis (ITA), which allows to identify trends in the several values of a series. At annual and seasonal scale, the results deduced from MK test mainly evidenced a slight or null increase of the significant wave height and a relevant increase of the energy period, influencing the magnitude of the wave power by the occurrence of longer waves. Moreover, the ITA method highlights a general increase in the highest values of the involved wave parameters. For the studied area, these aspects have a significant impact on the retreating of the beaches and on the future field installations of wave energy converters (WECs) for electricity purposes.
T. Caloiero; Francesco Aristodemo; Danilo Algieri Ferraro. Trend analysis of significant wave height and energy period in southern Italy. Theoretical and Applied Climatology 2019, 138, 917 -930.
AMA StyleT. Caloiero, Francesco Aristodemo, Danilo Algieri Ferraro. Trend analysis of significant wave height and energy period in southern Italy. Theoretical and Applied Climatology. 2019; 138 (1-2):917-930.
Chicago/Turabian StyleT. Caloiero; Francesco Aristodemo; Danilo Algieri Ferraro. 2019. "Trend analysis of significant wave height and energy period in southern Italy." Theoretical and Applied Climatology 138, no. 1-2: 917-930.
Large-scale physical experiments (Froude scale, 1:4.3) were performed at the new Delta Flume in 2017, aimed at investigating wave impacts on a vertical wall placed on the top of a dike in a mild slope shallow foreshore. Experiments also allowed to investigate the morphological evolution of the sandy foreshore, the scour at the dike toe and its development under irregular and bi-chromatic wave conditions. Both experimental results and numerical study performed to design the experiments are reported. Moreover, preliminary validation of the model to investigate the scour within a wider range of wave conditions and foreshore slopes is illustrated.
Alessandra Saponieri; Marcello Di Risio; Davide Pasquali; Nico Valentini; Francesco Aristodemo; Giuseppe Tripepi; Daniele Celli; Maximilian Streicher; Leonardo Damiani. BEACH PROFILE EVOLUTION IN FRONT OF STORM SEAWALLS: A PHYSICAL AND NUMERICAL STUDY. Coastal Engineering Proceedings 2018, 1, 70 .
AMA StyleAlessandra Saponieri, Marcello Di Risio, Davide Pasquali, Nico Valentini, Francesco Aristodemo, Giuseppe Tripepi, Daniele Celli, Maximilian Streicher, Leonardo Damiani. BEACH PROFILE EVOLUTION IN FRONT OF STORM SEAWALLS: A PHYSICAL AND NUMERICAL STUDY. Coastal Engineering Proceedings. 2018; 1 (36):70.
Chicago/Turabian StyleAlessandra Saponieri; Marcello Di Risio; Davide Pasquali; Nico Valentini; Francesco Aristodemo; Giuseppe Tripepi; Daniele Celli; Maximilian Streicher; Leonardo Damiani. 2018. "BEACH PROFILE EVOLUTION IN FRONT OF STORM SEAWALLS: A PHYSICAL AND NUMERICAL STUDY." Coastal Engineering Proceedings 1, no. 36: 70.
The present paper proposes a smoothing analysis of hydraulic head data sets obtained by means of different slug tests introduced in a confined aquifer. Laboratory experiments were performed through a 3D large-scale physical model built at the University of Calabria. The hydraulic head data were obtained by a pressure transducer placed in the injection well and subjected to a processing operation to smooth out the high-frequency noise occurring in the recorded signals. The adopted smoothing techniques working in time, frequency and time-frequency domain are the Savitzky-Golay filter modeled by third-order polynomial, the Fourier Transform and two types of Wavelet Transform (Mexican hat and Morlet). The performances of the filtered time series of the hydraulic heads for different slug volumes and measurement frequencies were statistically analyzed in terms of optimal fitting of the classical Cooper’s equation. For practical purposes, the hydraulic heads smoothed by the involved techniques were used to determine the hydraulic conductivity of the aquifer. The energy contents and the frequency oscillations of the hydraulic head variations in the aquifer were exploited in the time-frequency domain by means of Wavelet Transform as well as the non-linear features of the observed hydraulic head oscillations around the theoretical Cooper’s equation.
Francesco Aristodemo; Mario Ianchello; Carmine Fallico. Smoothing analysis of slug tests data for aquifer characterization at laboratory scale. Journal of Hydrology 2018, 562, 125 -139.
AMA StyleFrancesco Aristodemo, Mario Ianchello, Carmine Fallico. Smoothing analysis of slug tests data for aquifer characterization at laboratory scale. Journal of Hydrology. 2018; 562 ():125-139.
Chicago/Turabian StyleFrancesco Aristodemo; Mario Ianchello; Carmine Fallico. 2018. "Smoothing analysis of slug tests data for aquifer characterization at laboratory scale." Journal of Hydrology 562, no. : 125-139.
This paper presents a performance evaluation of Wave Energy Converters (WECs) in terms of electricity production for domestic and public supplies of coastal towns located near hot spot areas. The study was conducted off the coast of Calabria (Southern Italy), a Mediterranean region characterized by a mild wave climate which is quite representative of mean sea states in the Mediterranean basin. The wave energy potential was assessed in deep waters by means of ECMWF wave data validated against RON buoys and UKMO data. Thirteen types of offshore WECs were considered, comparing the performances of full-scale and downscaled devices in terms of yearly and seasonal mean electricity production and operating days. Based on the domestic electricity supplies and those related to the public plants of some selected coastal cities, the number of differently sized devices was calculated in order to satisfy the above needs. To preserve the wave energy production level, the spatial arrangement of wave energy farms was determined in order to minimize possible park effects. The obtained results highlight that the occurrence of offshore WEC farms in a typical Mediterranean zone can lead to a significant number of WECs for domestic and public electricity supplies with a progressive reduction for more energetic sites.
Francesco Aristodemo; Danilo Algieri Ferraro. Feasibility of WEC installations for domestic and public electrical supplies: A case study off the Calabrian coast. Renewable Energy 2018, 121, 261 -285.
AMA StyleFrancesco Aristodemo, Danilo Algieri Ferraro. Feasibility of WEC installations for domestic and public electrical supplies: A case study off the Calabrian coast. Renewable Energy. 2018; 121 ():261-285.
Chicago/Turabian StyleFrancesco Aristodemo; Danilo Algieri Ferraro. 2018. "Feasibility of WEC installations for domestic and public electrical supplies: A case study off the Calabrian coast." Renewable Energy 121, no. : 261-285.
A two-dimensional (2D) laboratory investigation on the horizontal and vertical hydrodynamic forces induced by tsunami-like solitary waves on horizontal circular cylinders placed on a rigid sea bed is presented. A series of 30 physical model tests was conducted in the wave channel of the University of Calabria in which a rigid circular cylinder was equipped with 12 pressure transducers placed along its external surface to determine the wave loads, with three wave gauges to record the surface elevation. The observed experimental range was characterized by the prevalence of the inertia component for the horizontal forces and of the lift component for the vertical ones. On the basis of the performance of several time-domain methods, the wave loads and the undisturbed velocity and acceleration derived from the surface elevation of the cylinder section were used to calculate the drag, lift, and horizontal and vertical inertia coefficients in the practical Morison and transverse semi-empirical equations.
Giuseppe Tripepi; Francesco Aristodemo; Paolo Veltri. On-Bottom Stability Analysis of Cylinders under Tsunami-Like Solitary Waves. Water 2018, 10, 487 .
AMA StyleGiuseppe Tripepi, Francesco Aristodemo, Paolo Veltri. On-Bottom Stability Analysis of Cylinders under Tsunami-Like Solitary Waves. Water. 2018; 10 (4):487.
Chicago/Turabian StyleGiuseppe Tripepi; Francesco Aristodemo; Paolo Veltri. 2018. "On-Bottom Stability Analysis of Cylinders under Tsunami-Like Solitary Waves." Water 10, no. 4: 487.
Francesco Aristodemo; Giuseppe Tripepi; Domenico Davide Meringolo; Paolo Veltri. Solitary wave-induced forces on horizontal circular cylinders: Laboratory experiments and SPH simulations. Coastal Engineering 2017, 129, 17 -35.
AMA StyleFrancesco Aristodemo, Giuseppe Tripepi, Domenico Davide Meringolo, Paolo Veltri. Solitary wave-induced forces on horizontal circular cylinders: Laboratory experiments and SPH simulations. Coastal Engineering. 2017; 129 ():17-35.
Chicago/Turabian StyleFrancesco Aristodemo; Giuseppe Tripepi; Domenico Davide Meringolo; Paolo Veltri. 2017. "Solitary wave-induced forces on horizontal circular cylinders: Laboratory experiments and SPH simulations." Coastal Engineering 129, no. : 17-35.
In this work, the solitary wave loads on a submerged horizontal circular cylinder are studied by comparing new analytical results with ad-hoc experimental data. The proposed analytical solution has been recently proposed by Gurnari and Filianoti (2017) and represents an extension of the formulation developed by Filianoti and Piscopo (2008) to assess the solitary wave loads acting on a submerged breakwater and tested in a wave flume on a small-scale model (Filianoti and Di Risio, 2012). Here we deal with a submerged horizontal cylinder following the concept that a solitary wave is subjected to a slowdown passing over a submerged cylinder. A laboratory investigation was addressed to calibrate the adopted semi-analytical method. The speed of the solitary wave celerity crossing the solid submerged cylinder was measured for several wave amplitudes. In the adopted wave flume at the University of Calabria equipped by a piston-type wavemaker, an horizontal cylinder with diameter D = 0.127 m was posed with its center at a depth of 0.2 m. Twelve transducers measured the instantaneous pressures along the external contour of the body. A battery of wave gauges measured the free surface elevation to evaluate the celerity crossing the equivalent water cylinder. Tests confirmed the existence of the slowing down of the celerity of the wave pressure. In other words, we found that the pressure wave is nearly double the time necessary to cross the cylinder with respect to the time necessary to cover the same distance in the undisturbed field, for solitary waves amplitudes ranging from about 0.08 and 0.19 times the water depth. The slowing down increases the horizontal wave force on the solid body with respect to the Froude-Krylov one. Moreover, it appears that in the adopted experimental range the wave force is essentially inertial if compared to the drag one, enabling us to rely upon a simplified analytical model to obtain an effective estimate of the horizontal force produced by a solitary wave on a cylinder.
Pasquale Filianoti; Luana Gurnari; Francesco Aristodemo; Giuseppe Tripepi. Wave Flume Tests to Check a Semi-Analytical Method for Calculating Solitary Wave Loads on Horizontal Cylinders. Volume 1: Offshore Technology 2017, 1 .
AMA StylePasquale Filianoti, Luana Gurnari, Francesco Aristodemo, Giuseppe Tripepi. Wave Flume Tests to Check a Semi-Analytical Method for Calculating Solitary Wave Loads on Horizontal Cylinders. Volume 1: Offshore Technology. 2017; ():1.
Chicago/Turabian StylePasquale Filianoti; Luana Gurnari; Francesco Aristodemo; Giuseppe Tripepi. 2017. "Wave Flume Tests to Check a Semi-Analytical Method for Calculating Solitary Wave Loads on Horizontal Cylinders." Volume 1: Offshore Technology , no. : 1.
This work deals with an experimental and numerical study on the horizontal and vertical hydrodynamic forces induced by tsunami-like waves on horizontal cylinders. The laboratory investigation has been performed in the wave flume of the University of Calabria. Twelve pressure transducers have been mounted along the external contour of a cylinder, while four wave gauges have been located close to the cylinder and an ultrasonic sensor behind the paddle to measure its displacement. Tests have been carried out for Keulegan-Carpenter numbers, KC, ranging from about 4 to 7. By the numerical viewpoint, a diffusive weakly-compressible SPH model has been adopted. To prevent spurious flows near the cylindrical contour, a packing algorithm has been applied before SPH simulations. The acoustic components occurring in the numerical pressure field have been filtered through the application of Wavelet Transform. By using different calibration methods, experimental and SPH forces and kinematics at the cylinder have been used to calculate the hydrodynamic coefficients in the Morison and transverse semi-empirical equations for engineering purposes.
Giuseppe Tripepi; Francesco Aristodemo; Paolo Veltri; Calogero Pace; Andrea Solano; Carlo Giordano. Experimental and Numerical Investigation of Tsunami-Like Waves on Horizontal Circular Cylinders. Volume 1: Offshore Technology 2017, 1 .
AMA StyleGiuseppe Tripepi, Francesco Aristodemo, Paolo Veltri, Calogero Pace, Andrea Solano, Carlo Giordano. Experimental and Numerical Investigation of Tsunami-Like Waves on Horizontal Circular Cylinders. Volume 1: Offshore Technology. 2017; ():1.
Chicago/Turabian StyleGiuseppe Tripepi; Francesco Aristodemo; Paolo Veltri; Calogero Pace; Andrea Solano; Carlo Giordano. 2017. "Experimental and Numerical Investigation of Tsunami-Like Waves on Horizontal Circular Cylinders." Volume 1: Offshore Technology , no. : 1.
The assessment of wave energy is fundamental to well evaluate potential wave energy at different sea locations and time scales in conjunction with the related occurrence of hot spots for an optimal installation of Wave Energy Converters (WECs). The present study has been performed off the coasts of Calabria (Southern Italy), a Mediterranean region characterized by a mild wave climate and quite representative of mean sea states in the Mediterranean basin. The wave energy potential has been assessed in deep waters by means of ECMWF operational wave data validated against RON buoys and UKMO data. The wave power is calculated as a function of the energy wave period deduced from directional wave spectra and compared with widely adopted relationships based on the use of a standard JONSWAP spectrum. The mean yearly and seasonal wave energy is then assessed at selected hot spots for Tyrrhenian and Ionian Seas at a water deep of 100 m suitable for the installation of several offshore WECs.
Danilo Algieri Ferraro; Francesco Aristodemo; Paolo Veltri. WAVE ENERGY RESOURCES ALONG CALABRIAN COASTS (ITALY). Coastal Engineering Proceedings 2017, 1, 5 .
AMA StyleDanilo Algieri Ferraro, Francesco Aristodemo, Paolo Veltri. WAVE ENERGY RESOURCES ALONG CALABRIAN COASTS (ITALY). Coastal Engineering Proceedings. 2017; 1 (35):5.
Chicago/Turabian StyleDanilo Algieri Ferraro; Francesco Aristodemo; Paolo Veltri. 2017. "WAVE ENERGY RESOURCES ALONG CALABRIAN COASTS (ITALY)." Coastal Engineering Proceedings 1, no. 35: 5.