Numerical modelling of a turbulent bluff-body flow with Reynolds stress turbulent models |
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作者姓名: | LI Guoxiu Dirk ROEKAERTS |
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作者单位: | School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China,Department of Applied Physics, Delft University of Technology, CJ2628 Delft, The Netherlands |
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摘 要: | Numerical modelling of a turbulent bluff-body flow has been performed using differential Reynolds stress models (DRSMs). To clarify the applicability of the existing DRSMs in this complex flow, several typical DRSMs, including LRR-IP model, JM model, SSG model, as well as a modified LRR-IP model, have been validated and evaluated. The performance difference between various DRSMs is quite significant. Most of the above mentioned DRSMs cannot provide overall satisfactory predictions for this challenging test case. Motivated by the deficiency of the existing approaches, a new modification of LRR-IP model has been proposed. A very significant improvement of the prediction of flow field is obtained.
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关 键 词: | bluff-body flow differential Reynolds stress models turbulent model. |
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