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The simulation of geometrically resolved rigid particles in a fluid relies oncoupling algorithms to transfer momentum both ways between the particles andthe fluid. In this article, the fluid flow is modeled with a parallel LatticeBoltzmann method using adaptive grid refinement to improve numericalefficiency. The coupling with the particles is realized with the momentumexchange method. When implemented in plain form, instabilities may arise in thecoupling when the particles are lighter than the fluid. The algorithm can bestabilized with a virtual mass correction specifically developed for theLattice Boltzmann method. The method is analyzed for a wide set of physicallyrelevant regimes, varying independently the body-to-fluid density ratio and therelative magnitude of inertial and viscous effects. These studies of a singlerising particle exhibit periodic regimes of particle motion as well as chaoticbehavior, as previously reported in the literature. The new method is carefullycompared with available experimental and numerical results. This serves tovalidate the presented new coupled Lattice Boltzmann method and additionally itleads to new physical insight for some of the parameter settings.

Coupling fully resolved light particles with the Lattice Boltzmann method on adaptively refined grids