期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 382, 期 -, 页码 240-263出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2019.01.010
关键词
Hydrodynamic stress model; Immersed boundary method; Particle-resolved direct numerical simulations
资金
- ONR [N000141110455]
- U.S. Department of Energy, Nuclear Energy University Program (DOE-NEUP) Grant [12-3549]
- China Scholarship Council [201404910164]
In this work we propose a hydrodynamic stress model that accurately reconstructs the forces on an immersed body, with application to the simulation of turbulence interacting with finite-size particles of arbitrary shape. The proposed model is local and is based on the boundary layer approximation, where the effects of surface curvature on the pressure variation are accounted for. Numerical experiments show that the model requires about one or two grid points within the boundary layer to accurately reconstruct the hydrodynamic force distribution. This reduces significantly the cost of resolving the flow field around the particles. The accuracy of the proposed model is evaluated in a variety of flows with increasing complexity. In particular, results for the flows over stationary and oscillating circular cylinders, free falling cylinders and spheres, and the interaction of turbulence with spheres and ellipsoids will be presented. (C) 2019 Elsevier Inc. All rights reserved.
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