Mechanical Engineering, Plant Sciences Institute, Mathematics
Journal or Book Title
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 O(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 1−106 encompassing the drag crisis regime; simulating flow features across a semi-truck for investigating the effect of platooning on efficiency.
Saurabh, Kumar; Gao, Boshun; Fernando, Milinda; Xu, Songzhe; Khara, Biswajit; Khanwale, Makrand A.; Hsu, Ming-Chen; Krishnamurthy, Adarsh; Sundar, Hari; and Ganapathysubramanian, Baskar, "Industrial scale large eddy simulations (LES) with adaptive octree meshes using immersogeometric analysis" (2020). Mechanical Engineering Publications. 435.