Industrial scale Large Eddy Simulations with adaptive octree meshes using immersogeometric analysis

Kumar Saurabh, Boshun Gao, Milinda Fernando, Songzhe Xu, Makrand A. Khanwale, Biswajit Khara, Ming-Chen Hsu, Adarsh Krishnamurthy, Hari Sundar, Baskar Ganapathysubramanian

Abstract: Highlights•Deployed VMS with weak BCs on massively parallel octree-based adaptive meshes.•Developed octree parallelization, efficient matrix assembly, and rapid in-out tests.•Demonstrated the ability to capture drag crisis without any wall treatment.•Demonstrated scalability of the framework up to O(32K)<math><mi mathvariant="script" is="true">O</mi><mo stretchy="false" is="true">(</mo><mn is="true">32</mn><mi is="true">K</mi><mo stretchy="false" is="true">)</mo></math> processors.•Deployed for industrial scale study of the platooning effect of semi-trucks.