A comparison of force computations for modeling fluid - structure interaction problems with the lattice Boltzmann volume penalisation method
Résumé
In this article, the capability of the VP-LBM (Volume Penalization -Lattice Boltzmann Method) is explored on new cases whose studied physics is quite different from previous work, and the use of fluid force calculation methods within the VP-LBM framework is discussed. The first method, the momentum exchange method, uses the variation of distribution functions near the fluid-solid interface, while the second, the stress integration method, allows the direct integration of fluid forces on this interface. Applied to the VP-LBM, which involves penalizing the solid in the LBM, these two methods can lead to significantly different results. Tests were carried out to investigate the lift and drag coefficients of a NACA 0012 profile at different angles of attack, Reynolds number 1000, an energy extraction system consisting of a translating and rotating foil, and finally the sedimentation of particles under the effect of gravity in a very low Reynolds number channel.
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