期刊
COMPUTERS & MATHEMATICS WITH APPLICATIONS
卷 97, 期 -, 页码 28-44出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.camwa.2021.05.028
关键词
Weak boundary conditions; Immersogeometric analysis; Octrees; Continuous Galerkin method; Drag crisis; Distributed parallel computing
资金
- NSF [1855902, 1935255, 1644441, 1750865, OAC-1808652]
- Directors discretionary award (Frontera)
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1935255] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1644441] Funding Source: National Science Foundation
- Office of Advanced Cyberinfrastructure (OAC)
- Direct For Computer & Info Scie & Enginr [1750865] Funding Source: National Science Foundation
A variant of the immersed boundary method integrated with octree meshes is introduced for highly efficient and accurate Large Eddy Simulations (LES) of flows around complex geometries. Scalability of the proposed method up to theta(32K) processors is demonstrated through rapid in-out tests, adaptive quadrature for accurate force evaluation, and tensorized evaluation during matrix assembly. The method is successfully showcased in accurately computing the drag coefficient of a sphere across Reynolds numbers 1 to 10^6 and simulating flow features across a semi-truck for investigating the effect of platooning on efficiency.
We present a variant of the immersed boundary method integrated with octree meshes for highly efficient and accurate Large Eddy Simulations (LES) of flows around complex geometries. We demonstrate the scalability of the proposed method up to theta(32K) processors. This is achieved by (a) rapid in-out tests; (b) adaptive quadrature for an accurate evaluation of forces; (c) tensorized evaluation during matrix assembly. We showcase this method on two non-trivial applications: accurately computing the drag coefficient of a sphere across Reynolds numbers 1 - 10(6) encompassing the drag crisis regime; simulating flow features across a semi-truck for investigating the effect of platooning on efficiency.
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