Year: 2023
Author: Arnab Ghosh, Alessandro Gabbana, Herman Wijshoff, Federico Toschi
Communications in Computational Physics, Vol. 33 (2023), Iss. 1 : pp. 349–366
Abstract
The immersed boundary method has emerged as an efficient approach for
the simulation of finite-sized solid particles in complex fluid flows. However, one of
the well known shortcomings of the method is the limited support for the simulation
of light particles, i.e. particles with a density lower than that of the surrounding fluid,
both in terms of accuracy and numerical stability.
Although a broad literature exists, with several authors reporting different approaches
for improving the stability of the method, most of these attempts introduce extra complexities and are very costly from a computational point of view.
In this work, we introduce an effective force stabilizing technique, allowing to extend
the stability range of the method by filtering spurious oscillations arising when dealing
with light-particles, pushing down the particle-to-fluid density ratio as low as 0.04.
We thoroughly validate the method comparing with both experimental and numerical
data available in literature.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/cicp.OA-2022-0058
Communications in Computational Physics, Vol. 33 (2023), Iss. 1 : pp. 349–366
Published online: 2023-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 18
Keywords: Immersed boundary method lattice Boltzmann method light particle force stabilization added mass effect.