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Graduated in Environmental Engineering in 2012 (University of Calabria, Arcavacata di Rende, Italy). Received a grant for a post graduate course OTTIMA Operational Oceanography and Information Technologies for Maritime Safety (PON 0102823) at IAMC-CNR (Institute for Coastal Marine Environment - National Research Council, Naples, Italy). From February 2015 started to collaborate with the Department of Civil Engineering (University of Calabria, Arcavacata di Rende, Italy) working in the wave flume of Laboratory of Large Scale Facilities (G.M.I.). He received the Ph.D. degree in Civil and Industrial Engineering with a thesis titled “Experimental and numerical modeling of solitary wave loads on horizontal circular cylinders”. To date, he is a Research Fellow at University of Calabria and is mainly involved in experimental activities related to coastal engineering.
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.
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.
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.
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.
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.
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.