A two‐phase adaptive finite element method for solid–fluid coupling in complex geometries |
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| Authors: | Xavier García Dimitrios Pavlidis Gerard J. Gorman Jefferson L. M. A. Gomes Matthew D. Piggott Elsa Aristodemou Julian Mindel John‐Paul Latham Christopher C. Pain Helen ApSimon |
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| Affiliation: | 1. Applied Modelling and Computation Group, Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London SW72AZ, U.K.;2. Centre for Environmental Policy, Imperial College London, South Kensington Campus, London SW72AZ, U.K. |
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| Abstract: | In this paper we present a method to solve the Navier–Stokes equations in complex geometries, such as porous sands, using a finite‐element solver but without the complexity of meshing the porous space. The method is based on treating the solid boundaries as a second fluid and solving a set of equations similar to those used for multi‐fluid flow. When combined with anisotropic mesh adaptivity, it is possible to resolve complex geometries starting with an arbitrary coarse mesh. The approach is validated by comparing simulation results with available data in three test cases. In the first we simulate the flow past a cylinder. The second test case compares the pressure drop in flow through random packs of spheres with the Ergun equation. In the last case simulation results are compared with experimental data on the flow past a simplified vehicle model (Ahmed body) at high Reynolds number using large‐eddy simulation (LES). Results are in good agreement with all three reference models. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | two‐fluid approach anisotropic mesh adaptivity Ergun equation flow past a cylinder flow past sphere packs flow past the Ahmed body |
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