Journal
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
Volume 136, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmultiphaseflow.2020.103519
Keywords
Settling; Non-spherical particles; Spectral element method; Benchmark; Immersed boundary method
Categories
Funding
- German Research Foundation (DFG) [UH 242/11-1]
- Ministry of Science, Research and the Arts Baden-Wurtemberg
- Federal Ministry of Education and Research
Ask authors/readers for more resources
Spectral/spectral-element simulations of a single oblate spheroid in unbounded ambient fluid were performed, covering various motion regimes and providing high-fidelity data. An extension of an immersed boundary method for tracking non-spherical particles was described, and grid convergence over different spheroidal particle motion regimes was discussed. The cross-validation results can guide the design of simulations involving spheroidal particles with Galileo numbers of O(100).
We have performed spectral/spectral-element simulations of a single oblate spheroid with small geometrical aspect ratio settling in an unbounded ambient fluid, for a range of Galileo numbers covering the various regimes of motion (steady vertical, steady oblique, vertical periodic and chaotic). The high-fidelity data provided includes particle quantities (statistics in the chaotic case), as well as flow profiles and pressure maps. The reference data can be used as an additional benchmark for other numerical approaches, where a careful grid convergence study for a specific target parameter point is often useful. We further describe an extension of a specific immersed boundary method (Uhlmann, J. Comput. Phys, 209(2):448-476, 2005) to enable the tracking of non-spherical particles. Finally, the reference cases are computed with this immersed boundary method at various spatial and temporal resolutions, and grid convergence is discussed over the various regimes of spheroidal particle motion. The cross-validation results can serve as a guideline for the design of simulations with the aid of similar non-conforming methods, involving spheroidal particles with Galileo numbers of O (100) . (C) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available