Spatial relation between fluctuating wall pressure and near-wall streamwise vortices in wall bounded turbulent flow |
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Authors: | Mingwei Ge Yingtao Zuo Ying Deng Yuhua Li |
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Affiliation: | 1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract: | A new view of the spatial relation between fluctuating wall pressure and near-wall streamwise vortices (NWSV) is proposed for wall bounded turbulent flow by use of the direct numerical simulation (DNS) database. The results show that the wall region with low pressure forms just below the strong NWSV, which is mostly associated with the overhead NWSV. The wall region with high pressure forms downstream of the NWSV, which has a good correspondence with the downwash of the fluids induced by the upstream NWSV. The results provide a significant basis for the detection of NWSV. |
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Keywords: | conditional correlation streamwise vortices fluctuating wall pressure |
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