| LARGE-EDDY SIMULATION OF SEPARATED FLOWS ON UNCONVENTIONALLY COARSE GRIDS | |
| Bin, Yuanwei1; Park George I.; Lv Y(吕钰); Yang, Xiang I. A. | |
| Source Publication | PROCEEDINGS OF ASME 2023 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2023, VOL 9 |
| 2023 | |
| Conference Name | ASME International Mechanical Engineering Congress and Exposition (IMECE) |
| Conference Date | OCT 29-NOV 02, 2023 |
| Conference Place | New Orleans, LA |
| Abstract | We examine and benchmark the emerging idea of applying the large-eddy simulation (LES) formalism to unconventionally coarse grids where RANS would be considered more appropriate at first glance. We distinguish this idea from very-large-eddy-simulation (VLES) and detached-eddy-simulation (DES), which require switching between RANS and LES formalism. LES on RANS grid is appealing because first, it requires minimal changes to a production code; second, it is more cost-effective than LES; third, it converges to LES; and most importantly, it accurately predicts flows with separation. This work quantifies the benefit of LES on RANS-like grids as compared to RANS on the same grids. Three canonical cases are considered: periodic hill, backwardfacing step, and jet in cross flow. We conduct direct numerical simulation (DNS), proper LES on LES grids, LES on RANSquality grids, and RANS. We show that while the LES solutions on the RANS-quality grids are not grid converged, they are twice as accurate as the RANS on the same grids. |
| Keyword | Turbulence Modeling Numerical Simulations Computational Fluid Dynamics |
| WOS ID | WOS:001216754200018 |
| Funding Organization | NNSFC [91752202]; NSF |
| ISBN | 978-0-7918-8766-0 |
| Indexed By | CPCI-S ; EI |
| Language | 英语 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97021 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.[Bin, Yuanwei; Yang, Xiang I. A.] Penn State Univ, Dept Mech Engn, University Pk, PA 16802 USA 2.Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing, Peoples R China 3.Park, George I.] Univ Penn, Mech Engn & Appl Mech, Philadelphia, PA 19104 USA 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Bin, Yuanwei,Park George I.,Lv Y,et al. LARGE-EDDY SIMULATION OF SEPARATED FLOWS ON UNCONVENTIONALLY COARSE GRIDS[C]PROCEEDINGS OF ASME 2023 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2023, VOL 9,2023. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Cp2024004.pdf（8756KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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