Semi‐implicit Lagrangian Voronoi approximation for the incompressible Navier–Stokes equations
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| Natura: | Artículo Open Access |
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Wiley
2024
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| _version_ | 1867005827629449216 |
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| author | Ondřej Kincl Ilya Peshkov Walter Boscheri |
| author_facet | Ondřej Kincl Ilya Peshkov Walter Boscheri Ondřej Kincl Ilya Peshkov Walter Boscheri |
| collection | Wiley Open Access |
| contents | Semi‐implicit Lagrangian Voronoi approximation for the incompressible Navier–Stokes equations Ondřej Kincl Ilya Peshkov Walter Boscheri International Journal for Numerical Methods in Fluids AbstractWe introduce semi‐implicit Lagrangian Voronoi approximation (SILVA), a novel numerical method for the solution of the incompressible Euler and Navier–Stokes equations, which combines the efficiency of semi‐implicit time marching schemes with the robustness of time‐dependent Voronoi tessellations. In SILVA, the numerical solution is stored at particles, which move with the fluid velocity and also play the role of the generators of the computational mesh. The Voronoi mesh is rapidly regenerated at each time step, allowing large deformations with topology changes. As opposed to the reconnection‐based Arbitrary‐Lagrangian‐Eulerian schemes, we need no remapping stage. A semi‐implicit scheme is devised in the context of moving Voronoi meshes to project the velocity field onto a divergence‐free manifold. We validate SILVA by illustrative benchmarks, including viscous, inviscid, and multi‐phase flows. Compared to its closest competitor, the Incompressible Smoothed Particle Hydrodynamics method, SILVA offers a sparser stiffness matrix and facilitates the implementation of no‐slip and free‐slip boundary conditions. 10.1002/fld.5339 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/fld.5339 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_fld_5339 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Semi‐implicit Lagrangian Voronoi approximation for the incompressible Navier–Stokes equations Ondřej Kincl Ilya Peshkov Walter Boscheri International Journal for Numerical Methods in Fluids Semi‐implicit Lagrangian Voronoi approximation for the incompressible Navier–Stokes equations Ondřej Kincl Ilya Peshkov Walter Boscheri International Journal for Numerical Methods in Fluids AbstractWe introduce semi‐implicit Lagrangian Voronoi approximation (SILVA), a novel numerical method for the solution of the incompressible Euler and Navier–Stokes equations, which combines the efficiency of semi‐implicit time marching schemes with the robustness of time‐dependent Voronoi tessellations. In SILVA, the numerical solution is stored at particles, which move with the fluid velocity and also play the role of the generators of the computational mesh. The Voronoi mesh is rapidly regenerated at each time step, allowing large deformations with topology changes. As opposed to the reconnection‐based Arbitrary‐Lagrangian‐Eulerian schemes, we need no remapping stage. A semi‐implicit scheme is devised in the context of moving Voronoi meshes to project the velocity field onto a divergence‐free manifold. We validate SILVA by illustrative benchmarks, including viscous, inviscid, and multi‐phase flows. Compared to its closest competitor, the Incompressible Smoothed Particle Hydrodynamics method, SILVA offers a sparser stiffness matrix and facilitates the implementation of no‐slip and free‐slip boundary conditions. 10.1002/fld.5339 http://creativecommons.org/licenses/by/4.0/ |
| title | Semi‐implicit Lagrangian Voronoi approximation for the incompressible Navier–Stokes equations |
| topic | International Journal for Numerical Methods in Fluids |
| url | https://onlinelibrary.wiley.com/doi/10.1002/fld.5339 |