Jeffrey HARRIS

Chercheur LHSV

Ecole des Ponts ParisTech / Saint-Venant Hydraulics Laboratory

Education

HDR, 2017, Université Paris-Est
PhD, 2011, Ocean Engineering, University of Rhode Island

Fields of interest

Modeling of ocean waves; high performance computing
Wave-structure interaction (with boundary element method); viscous-inviscid model coupling

Supervision

Francisco Jacome (PhD student, 2024-), heave plates
Jiankai Wang (PhD student, 2023-), machine learning

Publications

Wave–structure interaction by a two–way coupling between a fully nonlinear potential flow model and a Navier–Stokes solver
- Landesman Paul
- Harris Jeffrey
- Peyrard Christophe
- Benoit Michel
Ocean Engineering, Elsevier , 2024, 308, pp.118209 . A two-way domain decomposition coupling procedure between a fully nonlinear potential flow model and a Navier–Stokes solver capturing the free surface with a Volume of Fluid method is used to study wave–structure interaction applied to offshore wind turbines. Away from the structure, the large-scale inviscid wave field is modeled by the potential code. Wave generation and absorption in this 3D hybrid model take place in the outer potential domain. The codes exchange data in the region around their common boundaries. Through the two-way coupling, waves propagate in and out of the viscous subdomain, making the hybrid algorithm suitable to study wave diffraction on marine structures, while keeping the viscous subdomain small. Each code uses its own mesh and time step. Subdomains are overlapping, therefore continuity conditions on velocity and free surface have to be verified on two distinct coupling surfaces at any time. Parallel implementation with communications between the models relying on the Message Passing Interface library allows calculations on large spatial and temporal scales. The coupling algorithm is first tested for regular nonlinear waves and then applied to simulate wave loads exerted on a vertical monopile in 3D. Attention is paid to the high-order components of the horizontal force. (10.1016/j.oceaneng.2024.118209)
DOI : 10.1016/j.oceaneng.2024.118209
Numerical investigation of slamming loads on floating offshore wind turbines
- Batlle Martin Marc
- Harris Jeffrey
- Renaud Paul
- Hulin Florian
- Filipot Jean-François
, 2022, pp.ISOPE-I-22-031 . This paper presents the results of ongoing work regarding numerical simulations of breaking wave impacts on a surface-piercing cylinder. The computational fluid dynamics solver, Code Saturne, using the volume of fluid approach, is presented and utilised for offshore hydrodynamics. Phase-focused waves are employed to recreate singular breaking events under relatively controlled conditions. The fluid shape and kinematics are described during the breaking process and the load produced by a plunging breaker on a rigid cylinder is investigated.
Unified depth-limited wave breaking detection and dissipation in fully nonlinear potential flow models
- Mohanlal Sunil
- Harris Jeffrey
- Yates Marissa
- Grilli Stephan
, 2022 . A new method is proposed for simulating the energy dissipation resulting from depth-limited wave breaking, in combination with a universal breaking onset criterion, in two-dimensional (2D) fully nonlinear potential flow (FNPF) models, based on a non-dimensional breaking strength parameter. Two different 2D-FNPF models are used, which solve the Laplace equation based on Chebyshev polynomial expansions or a boundary element method. In these models, impending breaking waves are detected in real time using a universal breaking onset criterion proposed in earlier work, based on the ratio of the horizontal particle velocity at the crest u, relative to the crest velocity c, B = u/c > 0.85. For these waves wave energy is dissipated locally using an absorbing surface pressure that is calibrated using an inverted hydraulic jump analog. This approach is first validated for periodic spilling breakers over plane beaches and bars, for which results are shown to be in good agreement with experimental data. Recasting this breaking dissipation model in terms of a non-dimensional breaking strength, the hydraulic jump analog is shown to provide results similar to those of a constant breaking strength model, and to yield good agreement for periodic plunging breakers as well. The same approach is then applied to irregular waves shoaling over a submerged bar, and shown to agree well with experimental data for the wave height, asymmetry, skewness, and kurtosis. Future work will extend this 2D breaker model to cases of three-dimensional (3D) breaking waves, simulated in existing 3D-FNPF models, in shallow or deep water conditions.
Hybrid simulation of turbulent flow interactions with submerged structures by combining a potential flow solver and a Lattice-Boltzmann LES model
- O'Reilly Christopher M
- Grilli Stephan T
- Janssen Christian F
- Dahl Jason M
- Harris Jeffrey C.
, 2022 . We develop a 3D Lattice Boltzmann Method (LBM) with Large Eddy Simulation (LES), and a wall model, to simulate interactions of fully turbulent flows with ocean structures. The LBM is based on a hybrid method, combining inviscid (far-field) and viscous (near-field) perturbation flows. The inviscid flow is solved with potential flow theory. The near-field perturbation flow, which satisfies perturbation Navier- Stokes (NS) equations, is solved with a novel perturbation LBM model (pLBM), based on a collision operator using perturbation equilibrium distribution functions (DFs). The pLBM, previously applied to direct NS modeling (DNS) is extended to highly turbulent flows using a LES, and a wall model representing viscous/turbulent sub-layer near solid boundaries. The pLBM is first validated for turbulent channel flows, for moderate to large Reynolds numbers, Re in [3.7 x 10^4; 1.2 x 10^6], and we find the modeled plate friction coefficient and near-field turbulence properties agree well with both experiments and DNS results. We then simulate the flow past a NACA-0012 foil using both a regular LBM-LES and the pLBM-LES models, for Re = 1.44 X 10^6. A good agreement with experiments and results of other numerical methods is found for the computed lift and drag forces, and pressure distribution on the foil. The pLBM results are either nearly identical or slightly improved, relative to LBM results, but are obtained with a significantly smaller computational domain and hence computing cost, thus demonstrating the benefits of the new hybrid approach.
Nonlinear time-domain wave-structure interaction: a parallel fast integral equation approach
- Harris Jeffrey C
- Dombre Emmanuel
- Benoit Michel
- Grilli Stephan T.
- Kuznetsov Konstantin I
International Journal for Numerical Methods in Fluids, Wiley , 2022, 94, pp.188-222 . We report on the development and validation of a new Numerical Wave Tank (NWT) solving fully nonlinear potential flow (FNPF) equations, as a more efficient variation of Grilli et al.'s NWT [Grilli et al., A fully nonlinear model for three-dimensional overturning waves over arbitrary bottom, International Journal for Numerical Methods in Fluids 35 (2001) 829-867], which was successful at modeling many wave phenomena, including landslide-generated tsunamis, rogue waves, and the initiation (10.1002/fld.5051)
DOI : 10.1002/fld.5051
Experimental and numerical characterization of swell type waves effect on wind sea growth with fetch
- Villefer Antoine
- Benoit Michel
- Violeau Damien
- Teles Maria João
- Harris Jeffrey C.
- Branger Hubert
- Luneau Christopher
, 2021 .
Influence of swell on wind-wave growth with fetch: an experimental and numerical study
- Villefer Antoine
- Teles Maria João
- Benoit Michel
- Violeau Damien
- Harris Jeffrey C.
- Branger Hubert
, 2021 .
Finite volume arbitrary Lagrangian-Eulerian schemes using dual meshes for ocean wave applications
- Ferrand Martin
- Harris Jeffrey C.
Computers and Fluids, Elsevier , 2021, 219, pp.104860 . • Finite volume three-dimensional Navier-Stokes modeling of water wave propagation • Steep wave generation and propagation with Arbitrary Lagrangian-Eulerian scheme • Use of Compatible Discrete Operators shows improved accuracy and stability Finite volume Arbitrary Lagrangian-Eulerian schemes using dual meshes for ocean wave applications. For reasons of efficiency and accuracy, water wave propagation is often simulated with potential or inviscid models rather than Navier-Stokes solvers, but for wave-induced flows, such as wave-structure interaction, viscous effects are important under certain conditions. Alternatively, general purpose Navier-Stokes (CFD) models can have limitations when applied to such free-surface problems when dealing with large amplitude waves, run-up, or propagation over long distances. Here we present an Arbitrary Lagrangian-Eulerian (ALE) algorithm with special care to the time-stepping and boundary conditions used for the free-surfaces, integrated into Code_Saturne, and we test its capabilities for modeling a variety of water wave generation and propagation benchmarks, and finally consider interaction with a vertical cylinder. Two variants of the mesh displacement computation are proposed and tested against the discrete Geometric Conservation Law (GCL). The more robust variant, for highly curved or sawtoothed free-surfaces, uses a Compatible Discrete Operator scheme on the dual mesh for solving the mesh displacement, which makes the algorithm valid for any polyhedral mesh. Results for standard wave propagation benchmarks for both variants show that, when care is taken to avoid grids with excessive numerical dissipation, this approach is effective at reproducing wave profiles as well as forces on bodies. (10.1016/j.compfluid.2021.104860)
DOI : 10.1016/j.compfluid.2021.104860
Comparison of fully non linear and weakly nonlinear potential flow solvers for the study of wave energy converters undergoing large amplitude of motions
- Letournel Lucas
- Harris Jeffrey C.
- Ferrant Pierre
- Babarit Aurélien
- Ducrozet Guillaume
- Benoit Michel
- Dombre Emmanuel
, 2014 . We present a comparison between two distinct numerical codes dedicated to the study of wave energy converters. Both are developed by the authors, using a boundary element method with linear triangular elements. One model applies fully nonlin-ear boundary conditions in a numerical wavetank environnment (and thus referred later as NWT), whereas the second relies on a weak-scatterer approach in open-domain and can be considered a weakly nonlinear potential code (referred later as WSC). For the purposes of comparison, we limit our study to the forces on a heaving submerged sphere. Additional results for more realistic problem geometries will be presented at the conference. INTRODUCTION Among the marine renewable energy sources, wave energy is a promising option. Despite the great number of technologies that have been proposed, currently no wave energy converter (WEC) has proven its superiority over others and become a technological solution. Usual numerical tools for modeling and designing WECs are based on boundary elements methods in linear potential theory [1-4]. However WECs efficiency relies on large amplitude motions [5], with a design of their resonance frequencies in the wave excitation. Linear potential theory is thus inadequate to study the behavior of WEC in such configuration. (10.1115/OMAE2014-23912)
DOI : 10.1115/OMAE2014-23912