Posts

[1]

Alexis Hérault, Annamaria Vicari, and Ciro Del Negro, A SPH thermal model for the cooling of a lava lake, Proceedings of the 3th SPHERIC Workshop (Lausanne), 2008. [ bib ]

[2]

Robert A. Dalrymple and Alexis Hérault, Levee breaching with GPU-SPHysics code, Proceedings of the 4th SPHERIC Workshop (Nantes), 2009. [ bib | .pdf ]

[3]

Alexis Hérault, Annamaria Vicari, Ciro Del Negro, and Robert A. Dalrymple, Modeling water waves in the surf zone with GPU-SPHysics, Proceedings of the 4th SPHERIC Workshop (Nantes), 2009. [ bib ]

[4]

Alexis Hérault, Giuseppe Bilotta, and Robert A. Dalrymple, SPH on GPU with CUDA, Journal of Hydraulic Research 48 (2010), no. Extra Issue, 74–79. [ bib ]

[5]

Robert A. Dalrymple, Alexis Hérault, Giuseppe Bilotta, and Rozita Jalali Farahani, GPU-accelerated SPH model for water waves and free surface flows, Coastal Engineering Proceedings 1 (2011), no. 32, 9. [ bib | DOI | http ]

[6]

Robert Weiss, Andrew James Munoz, Robert A. Dalrymple, Alexis Hérault, and Giuseppe Bilotta, Three-dimensional modeling of long-wave runup: simulation of tsunami inundation with GPU-SPHYSICS, Coastal Engineering Proceedings 1 (2011), no. 32, 8. [ bib | DOI | http ]

[7]

Alexis Hérault, Giuseppe Bilotta, Annamaria Vicari, Eugenio Rustico, and Ciro Del Negro, Numerical simulation of lava flow using a GPU SPH model, Annals of Geophysics 54 (2011), no. 5, 600–620. [ bib | DOI ]

[8]

Giuseppe Bilotta, Giovanni Russo, Alexis Hérault, and Ciro Del Negro, Moving least-squares corrections for Smoothed Particle Hydrodynamics, Annals of Geophysics 54 (2011), no. 5, 622–633. [ bib | DOI ]

[9]

Eugenio Rustico, Giuseppe Bilotta, Giovani Gallo, Alexis Hérault, Ciro Del Negro, and Robert A. Dalrymple, A journey from single-GPU to optimized multi-GPU SPH with CUDA, Proceedings of the 7th SPHERIC Workshop (Prato), 2012, pp. 274–281. [ bib ]

[10]

Rozita Jalali Farahani, Robert A. Dalrymple, Alexis Hérault, and Giuseppe Bilotta, Turbulent coherent structures under breaking water waves, Proceedings of the 7th SPHERIC Workshop (Prato), 2012, pp. 171––178. [ bib ]

[11]

Billy L. Edge, Margery Overton, Robert A. Dalrymple, Alexis Hérault, Giuseppe Bilotta, M. Kurum, and Kevin Gamiel, Application of GPU Smooth Particle Hydrodynamics: wave runup and overtopping on composite slopes, Coastal Engineering Proceedings 1 (2012), no. 33, 74. [ bib | DOI | http ]

[12]

Martin Ferrand, D. R. Laurence, Benedict D. Rogers, Damien Violeau, and Christophe Kassiotis, Unified semi-analytical wall boundary conditions for inviscid, laminar or turbulent flows in the meshless SPH method, International Journal for Numerical Methods in Fluids 71 (2012), no. 4, 446–472. [ bib | DOI | arXiv | http ]

[13]

Arno Mayrhofer, Benedict D. Rogers, Damien Violeau, and Martin Ferrand, Investigation of wall bounded flows using SPH and the unified semi-analytical wall boundary conditions, Computer Physics Communications 184 (2013), no. 11, 2515–2527. [ bib | DOI | http ]

[14]

Rozita Jalali Farahani, Robert A. Dalrymple, Alexis Hérault, and Giuseppe Bilotta, Three-dimensional SPH modeling of a Bar/Rip channel system, Journal of Waterway, Port, Coastal, and Ocean Engineering 140 (2014), no. 1, 82–99. [ bib | DOI ]

[15]

Eugenio Rustico, Giuseppe Bilotta, Alexis Hérault, Ciro Del Negro, and Giovani Gallo, Advances in multi-GPU smoothed particle hydrodynamics simulations, IEEE Transactions on Parallel and Distributed Systems 25 (2014), no. 1, 43–52. [ bib | DOI ]

[16]

Eugenio Rustico, Jacek A. Jankowski, Alexis Hérault, Giuseppe Bilotta, and Ciro Del Negro, Multi-GPU, multi-node SPH implementation with arbitrary domain decomposition, Proceedings of the 9th SPHERIC Workshop (Paris), March 2014, pp. 127–133. [ bib ]

[17]

Billy L. Edge, Kevin Gamiel, Robert A. Dalrymple, Alexis Hérault, and Giuseppe Bilotta, Application of GPUSPH to design of wave energy, Proceedings of the 9th SPHERIC Workshop (Paris), March 2014, pp. 342–347. [ bib ]

[18]

Rozita Jalali Farahani, Robert A. Dalrymple, Alexis Hérault, Giuseppe Bilotta, and Eugenio Rustico, Modeling the coherent vortices in breaking waves, Proceedings of the 9th SPHERIC Workshop (Paris), March 2014, pp. 297–304. [ bib ]

[19]

Giuseppe Bilotta, Alexander Vorobyev, Alexis Hérault, Arno Mayrhofer, and Damien Violeau, Modelling real-life flows in hydraulic waterworks with GPUSPH, Proceedings of the 9th SPHERIC Workshop (Paris), March 2014, pp. 335–341. [ bib ]

[20]

Alexis Hérault, Giuseppe Bilotta, and Robert A. Dalrymple, Achieving the best accuracy in an SPH implementation, Proceedings of the 9th SPHERIC Workshop (Paris), March 2014, pp. 134–139. [ bib ]

[21]

Rozita Jalali Farahani and Robert A. Dalrymple, Three-dimensional reversed horseshoe vortex structures under broken solitary waves, Coastal Engineering 91 (2014), 261–279. [ bib | DOI | http ]

Turbulent vortical structures under broken solitary waves are studied using three-dimensional smoothed particle hydrodynamics (SPH) method. The numerical model predicts water surface evolution and horizontal velocity very well in comparison with the experimental results. The numerical results detect organized coherent structures characterized as reversed horseshoe (hairpin) vortices being generated at the back of the broken spilling wave and traveling downward. The counter rotating legs of the reversed horseshoe structures appear to be a continuous form of the previously found obliquely descending eddies. The reversed horseshoe structures are associated with the turbulence motion of sweep events (downwelling motion) and transport momentum and turbulent kinetic energy downward into the water column. Vortex turning play an important role on the generation and evolution of three dimensional reversed horseshoe structures from the spanwise breaking wave rollers.

Keywords: Solitary wave, Obliquely descending eddies, Reversed horseshoe vortices, Smoothed particle hydrodynamics method

[22]

Giuseppe Bilotta, GPU implementation and validation of fully three-dimensional multi-fluid SPH models, Rapporto Tecnico 292, INGV, 2014. [ bib | .pdf ]

[23]

Arno Mayrhofer, Martin Ferrand, Christophe Kassiotis, Damien Violeau, and François-Xavier Morel, Unified semi-analytical wall boundary conditions in SPH: analytical extension to 3-D, Numerical Algorithms 68 (2015), 15–34. [ bib | DOI ]

[24]

Arno Mayrhofer, Giuseppe Bilotta, and Alexis Hérault, Semi-analytical wall boundary conditions for locally flat geometries, Proceedings of the 10th SPHERIC Workshop (Prato), 2015. [ bib ]

[25]

Zhangping Wei, Robert A. Dalrymple, Eugenio Rustico, Alexis Hérault, Giuseppe Bilotta, and Harry Yeh, SPH modeling of dynamic impact of tsunami bore on bridge piers, Coastal Engineering 104 (2015), 26–42. [ bib | DOI ]

[26]

Zhangping Wei and Robert A. Dalrymple, Numerical study on mitigating tsunami force on bridges by an SPH model, Journal of Ocean Engineering and Marine Energy 2 (2016), 365–380. [ bib | DOI ]

[27]

Zhangping Wei, Robert A. Dalrymple, Eugenio Rustico, Alexis Hérault, and Giuseppe Bilotta, Simulation of nearshore tsunami breaking by Smoothed Particle Hydrodynamics method, Journal of Waterway, Port, Coastal, and Ocean Engineering 142 (2016), 05016001. [ bib | DOI | http ]

[28]

Zhangping Wei, H. B. Shi, C. Li, J. Katz, Robert A. Dalrymple, and Giuseppe Bilotta, Behavior of oil under breaking waves by a two-phase SPH model, Proceedings of the 11th SPHERIC Workshop (Münich), 2016. [ bib ]

[29]

Giuseppe Bilotta, Alexis Hérault, Annalisa Cappello, Gaetana Ganci, and Ciro Del Negro, GPUSPH: a Smoothed Particle Hydrodynamics model for the thermal and rheological evolution of lava flows, Detecting, Modelling and Responding to Effusive Eruptions, Geological Society, London, Special Publications, vol. 426, no. 1, Geological Society of London, 2016, pp. 387–408. [ bib | DOI ]

[30]

Jean-Marie Le Goff, Navier–Stokes modelling of offshore wind turbines using the SPH method, Master's thesis, KTH School of Industrial Engineering and Management, SE-100 44 STOCKHOLM, 2017. [ bib | http ]

[31]

Martin Ferrand, Antoine Joly, Christophe Kassiotis, Damien Violeau, Agnès Leroy, François-Xavier Morel, and Benedict D. Rogers, Unsteady open boundaries for SPH using semi-analytical conditions and Riemann solver in 2D, Computer Physics Communications 210 (2017), 29–44. [ bib | DOI | http ]

[32]

Thomas Fonty, Agnès Leroy, Damien Violeau, Antoine Joly, José Milla Lopez Asiain, and Grégory Guyot, Numerical modelling of the undersluices of the rance tidal power station with SPH, Proceedings of the 12th SPHERIC Workshop (Ourense, Spain), 2017. [ bib ]

[33]

Gaetana Ganci, Vito Zago, Giuseppe Bilotta, Annalisa Cappello, Alexis Hérault, and Ciro Del Negro, Lava cooling modelled with GPUSPH, EGU General Assembly Conference Abstracts, EGU General Assembly Conference Abstracts, April 2017, p. 15157. [ bib ]

[34]

Vito Zago, Giuseppe Bilotta, Annalisa Cappello, Robert A. Dalrymple, Luigi Fortuna, Gaetana Ganci, Alexis Hérault, and Ciro Del Negro, Implicit integration of the viscous term and GPU implementation in GPUSPH for lava flows, Proceedings of the 12th SPHERIC Workshop (Ourense, Spain), 2017. [ bib ]

[35]

Vito Zago, Giuseppe Bilotta, Annalisa Cappello, Robert A. Dalrymple, Luigi Fortuna, Gaetana Ganci, Alexis Hérault, and Ciro Del Negro, Simulating complex fluids with Smoothed Particle Hydrodynamics, Annals of Geophysics 60 (2017), no. 6, PH669. [ bib | DOI ]

[36]

Vito Zago, Giuseppe Bilotta, Annalisa Cappello, Gaetana Ganci, Ciro Del Negro, Alexis Hérault, Luigi Fortuna, and Robert A. Dalrymple, Benchmarking of the GPUSPH particle engine on lava flows, Proceedings of the 13th SPHERIC Workshop (Galway, Ireland), 2018. [ bib ]

[37]

Vito Zago, Giuseppe Bilotta, Alexis Hérault, Robert A. Dalrymple, Luigi Fortuna, Annalisa Cappello, Gaetana Ganci, and Ciro Del Negro, Semi-implicit 3D SPH on GPU for lava flows, Journal of Computational Physics 375 (2018), 854–870. [ bib | DOI ]

[38]

Andreia B. Moreira, Agnès Leroy, Damien Violeau, and Francisco Taveira-Pinto, Simulating spillway flows with the SPH method, Proceedings of the 13th SPHERIC Workshop (Galway, Ireland), 2018. [ bib ]

[39]

Giuseppe Bilotta, Vito Zago, and Alexis Hérault, Design and implementation of particle systems for meshfree methods with high performance, High Performance Parallel Computing (Satyadhyan Chickerur, ed.), IntechOpen, Rijeka, 2018. [ bib | DOI | http ]

[40]

Rémi Carmigiani, Agnès Leroy, and Damien Violeau, A simple SPH model of a free surface water wave pump: waves above a submerged plate, Coastal Engineering Journal 61 (2019), no. 1, 96–108. [ bib | DOI ]

[41]

Zhangping Wei, Billy L. Edge, Robert A. Dalrymple, and Alexis Hérault, Modeling of wave energy converters by GPUSPH and Project Chrono, Ocean Engineering 183 (2019), 332–349. [ bib | DOI | http ]

[42]

Xuelin Ding, Coco Giovanni, Robert A. Dalrymple, Zhangping Wei, Roland Garnier, Colin Whittaker, and Robert T. Guza, Simulations of subharmonic edge wave excitation using GPUSPH, Proceedings of the 14th SPHERIC Workshop (Exeter, UK), 2019. [ bib ]

[43]

Vito Zago, Robert A. Dalrymple, Giuseppe Bilotta, Annalisa Cappello, Alexis Hérault, and Noura Almashan, Coupling SPH and FEM analysis in GPUSPH for the study and design of offshore platforms, Proceedings of the 14th SPHERIC Workshop (Exeter, UK), 2019. [ bib ]

[44]

Athanasios Mokos, Rémi Carmigiani, Damien Violeau, and Agnès Leroy, Simulating wave overtopping on a complex dike structure using GPUSPH, Proceedings of the 14th SPHERIC Workshop (Exeter, UK), 2019. [ bib ]

[45]

Giuseppe Bilotta, Vito Zago, Alexis Hérault, Elie Saikali, and Robert A. Dalrymple, Bigger, cleaner, faster: notes on the implementation of a powerful, flexible, high-performance SPH computational engine, Proceedings of the 14th SPHERIC Workshop (Exeter, UK), 2019. [ bib ]

[46]

Andreia B. Moreira, Agnès Leroy, Damien Violeau, and Francisco Taveira-Pinto, Dam spillways and the SPH method: two case studies in Portugal, Journal of Applied Water Engineering and Research 7 (2019), no. 3, 228–245. [ bib | DOI ]

[47]

Vito Zago, Giuseppe Bilotta, Annalisa Cappello, Robert A. Dalrymple, Luigi Fortuna, Gaetana Ganci, Alexis Hérault, and Ciro Del Negro, Preliminary validation of lava benchmark tests on the GPUSPH particle engine, Annals of Geophysics 62 (2019), no. 2, VO224. [ bib | DOI ]

[48]

Andreia B. Moreira, Agnès Leroy, Damien Violeau, and Francisco Taveira-Pinto, Overview of large-scale Smoothed Particle Hydrodynamics modeling of dam hydraulics, Journal of Hydraulic Engineering 146 (2020), no. 2, 03119001. [ bib | DOI ]

[49]

Morteza Derakhti, Robert A. Dalrymple, Emile A. Okal, and Costas E. Synolakis, Temporal and topographic source effects on tsunami generation, Journal of Geophysical Research: Oceans 124 (2019), no. 7, 5270–5288. [ bib | DOI | arXiv | http ]

Keywords: tsunami genesis, vertical seabed displacements, tsunamis over seamounts, tsunami modeling, SPH method, coastal hazards

[50]

Elie Saikali, Giuseppe Bilotta, Alexis Hérault, and Vito Zago, Accuracy improvements for single precision implementations of the SPH method, International Journal of Computational Fluid Dynamics 34 (2020), no. 10, 774–787. [ bib | DOI | arXiv | http ]

[51]

Athanasios Mokos, Rémi Carmigniani, Agnès Leroy, and Damien Violeau, Simulating wave overtopping on a complex coastal structure using SPH, Journal of Applied Water Engineering and Research 8 (2020), no. 1, 55–65. [ bib | DOI | arXiv | http ]

[52]

Giuseppe Bilotta, Studying the rheology of geophysical flows with physical-mathematical models: An application of the GPUSPH particle engine, Il nuovo cimento C (2020), A122. [ bib | DOI | http ]

[53]

Alex Ghaïtanellis, Damien Violeau, Philip L.-F. Liu, and Thomas Viard, SPH simulation of the 2007 Chehalis Lake landslide and subsequent tsunami, Journal of Hydraulic Research 0 (2021), no. 0, 1–25. [ bib | DOI | arXiv | http ]

[54]

Giuseppe Bilotta, Vito Zago, Veronica Centorrino, Alexis Hérault, Robert A. Dalrymple, and Ciro Del Negro, Improvements to a semi-implicit integration scheme for viscous fluids in SPH, Proceedings of the 15th SPHERIC Workshop (New York), 2021. [ bib ]

[55]

Vito Zago, Lennart J. Schulze, N. Almashan, and Robert A. Dalrymple, Overcoming excessive numerical dissipation in SPH modeling of water waves, Coastal Engineering 170 (2021), 104018. [ bib | DOI | http ]

Excessive nonphysical energy dissipation is a problem in Smoothed Particle Hydrodynamics (SPH) when modeling free surface waves, resulting in a significant decrease in wave amplitude within a few wavelengths for progressive waves. This dissipation poses a limitation to the physical scale of SPH applications involving water wave propagation. Some prior solutions to this wave decay problem rely on elaborate schemes, which require a complex, or non-straightforward, implementation. Other approaches demand large smoothing lengths that lead to longer simulation times and potential degradation of the results. In this work we present an approach based on a kernel gradient correction. Our scheme is fully 3D and solves the main known drawbacks of kernel gradient corrections, such as instabilities and lack of momentum conservation. The latter is ensured by adopting an averaged correction matrix, so as to conserve reciprocity during particle interactions. We test our model with a standing wave in a basin and a progressive wave train in a wave tank, and in both cases no nonphysical decay occurs. A comparison to an approach based on large smoothing factors shows advantages both in quality of the results and simulation time.

Keywords: WCSPH, Wave propagation, Coastal engineering, Kernel correction, Decay

[56]

Andreia B. Moreira, Pedro A. Manso, Damien Violeau, and Francisco Taveira-Pinto, Single-phase SPH modelling of plunge pool dynamic pressures at a near-prototype scale, Journal of Hydraulic Research 59 (2021), no. 6, 888–902. [ bib | DOI | arXiv | http ]

[57]

Vito Zago, Noura Almashan, Robert A. Dalrymple, Giuseppe Bilotta, Dana B. Al-Houti, and Subramaniam Neelamani, Validation of an SPH-FEM model for offshore structure, Proceedings of the 16th SPHERIC Workshop (Catania), 2022. [ bib ]

[58]

Lennart J. Schulze, Vito Zago, Giuseppe Bilotta, and Robert A. Dalrymple, Localized kernel gradient correction for SPH simulations of water wave propagation, Proceedings of the 16th SPHERIC Workshop (Catania), 2022. [ bib ]

[59]

Giuseppe Bilotta, Vito Zago, Veronica Centorrino, Robert A. Dalrymple, Alexis Hérault, and Ciro Del Negro, A numerically robust, parallel-friendly variant of BiCGSTAB for the semi-implicit integration of the viscous term in smoothed particle hydrodynamics, Journal of Computational Physics 446 (2022), 111413. [ bib | DOI | http ]

Implicit integration of the viscous term can significantly improve performance in computational fluid dynamics for highly viscous fluids such as lava. We show improvements over our previous proposal for semi-implicit viscous integration in Smoothed Particle Hydrodynamics, extending it to support a wider range of boundary models. Due to the resulting loss of matrix symmetry, a key advancement is a more robust version of the biconjugate gradient stabilized method to solve the linear systems, that is also better suited for parallelization in both shared-memory and distributed-memory systems. The advantages of the new solver are demostrated in applications with both Newtonian and non-Newtonian fluids, covering both the numerical aspect (improved convergence thanks to the possibility to use more accurate boundary model) and the computing aspect (with excellent strong scaling and satisfactory weak scaling).

Keywords: SPH, Low Reynolds number, Implicit integration, BiCGSTAB, GPU

[60]

Zhen-Xi Zhao, Giuseppe Bilotta, Qin-Er Yuan, Zhao-Xin Gong, and Hua Liu, Multi-GPU multi-resolution SPH framework towards massive hydrodynamics simulations and its applications in high-speed water entry, Journal of Computational Physics 490 (2023), 112339. [ bib | DOI | http ]

[61]

Giuseppe Bilotta, Alexis Hérault, Elie Saikali, and Robert A. Dalrymple, Stability and performance of the acoustic terms in WCSPH, Proceedings of the 17th SPHERIC Workshop (Rhodes), 2023. [ bib ]

[62]

Vito Zago, Robert A. Dalrymple, N. Almashan, Giuseppe Bilotta, D. Al-Houti, and S. Neelamani, Characterization and modeling of greenwater overtopping of a sea-level deck, Ocean Engineering 275 (2023), 114131. [ bib | DOI | http ]

Greenwater overtopping occurs when the deck of a marine structure or ship is submerged by a large non-breaking wave. This overtopping wave develops into a fast-moving mass of water that can damage deck structures. In this work we use laboratory experiments to characterize the kinematics of the greenwater fronts, showing that there are two main classes of flow. One class is an essentially two-dimensional flow with a single wave front traversing the entire deck, while the second type has multiple wave fronts originating from all sides of the platform. We characterize each type with respect to wave conditions and describe the transition between the two types. We then discuss two modeling approaches that can be used to simulate the kinematic of the overtopping fronts. A simple linear model, based on linear wave theory and on the assumption of the overtopping as a dam break, to predict the type and the propagation of the overtopping wave on the deck. The second is a three-dimensional nonlinear numerical hydrodynamics model, based on Smoothed Particle Hydrodynamics method, which reproduces the geometry of the overtopping in the laboratory more accurately. We compare the outputs of these models with laboratory observations and discuss their applicability.

Keywords: Greenwater, Wave overtopping, SPH, Offshore structure

[63]

Giuseppe Bilotta, Vito Zago, Alexis Hérault, Annalisa Cappello, Gaetana Ganci, Hendrik D. van Ettinger, and Ciro Del Negro, Optimization of flexible neighbors lists in Smoothed Particle Hydrodynamics on GPU, Advances in Engineering Software 196 (2024), 103711. [ bib | DOI | http ]

[64]

Gaetana Ganci, Giuseppe Bilotta, Annalisa Cappello, Francesco Ciancitto, and Emilio Pecora, Characterizing volcano deposits with SPH, Proceedings of the 18th SPHERIC Workshop (Berlin), 2024. [ bib ]

[65]

Giuseppe Bilotta, From GPU to CPU (and beyond): extending hardware support in GPUSPH through a SYCL-inspired interface, Concurrency and Computation: Practice and Experience 37 (2025), e8313. [ bib | DOI | http ]

[66]

Vito Zago, Nourah Almashan, Robert A. Dalrymple, and Giuseppe Bilotta, Design and validation of a coupled SPH-FEM model for offshore structures, Ocean Engineering 343 (2026), 123194. [ bib | DOI | http ]

The design of offshore structures must consider the possible severe conditions created by the marine environment, as waves exert forces that can threaten the integrity of the structures. SPH-FEM coupled models can accurately predict fluid-solid interaction forces and solid deformation. However, when dealing with large structures, the computational load of these models can be very high. Therefore, some applications to large structures assume rigid behavior or treat some subsystems analytically. In this work we discuss the design, implementation, and validation of an entirely numerical model based on Weakly Compressible (WCSPH) and the Absolute Nodal Coordinate Formulation (ANCF) variant of the Finite Element Method (FEM), optimized for the simulation of waves interacting with large structures. Approaches for the reduction of the numerical noise and simulation time are addressed. The model simultaneously estimates pressures, forces, moments, and structure deformations, as well as the 3D representation of sea waves and their interaction with the solid structure, constituting one of the most complete and complex applications of the SPH method to a real-world case study, validated for all the outputs against laboratory data. The data is obtained from a physical scaled model of an offshore platform, tested under various wave and water-level conditions.

Keywords: SPH, FEM, Offshore, Coupling

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