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ISPH-PBD: coupled simulation of incompressible fluids and deformable bodies

Abu Rumman, N; Nair, P; Mueller, P; Barthe, L; Vanderhaeghe, D; (2020) ISPH-PBD: coupled simulation of incompressible fluids and deformable bodies. The Visual Computer , 36 (5) pp. 893-910. 10.1007/s00371-019-01700-y. Green open access

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Abstract

We present an efficient and stable method for simulating the two-way coupling of incompressible fluids and deformable bodies. In our method, the fluid is represented by particles, and simulated using divergence-free incompressible smoothed-particle hydrodynamics (ISPH). The deformable bodies are represented by polygonal meshes, where the elastic deformations are simulated using a position-based dynamics scheme. Our technique enforces incompressibility on the fluid using divergence-free constraints on the velocity field, while it effectively simulates the physical features of deformable bodies. Most current ISPH methods are struggling with the issue of free-surface boundary conditions. We handle this problem by introducing a novel free-surface formulation, where our free-surface model obviates the need to identify the surface particles. For the interaction between the fluid and the deformable solids, we model the forces that both phases, fluid and solid, exert upon each other. We demonstrate that our approach effectively handles complex coupling scenarios between fluids and thin deformable shells or highly deformable solids, and produces plausible results.

Type: Article
Title: ISPH-PBD: coupled simulation of incompressible fluids and deformable bodies
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s00371-019-01700-y
Publisher version: https://doi.org/10.1007/s00371-019-01700-y
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: ISPH, PBD, Thin shells, Deformable bodies, Fluids
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10074406
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