DNS , LES , and wall - modeled LES of separating flow over periodic hills
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چکیده
Separating flow in a channel with streamwise periodic constrictions is investigated using direct numerical simulation (DNS), large eddy simulation (LES), and wall-modeled LES (WMLES). The Reynolds number based on the hill height and the bulk velocity above the hill crest is 10,595. The results presented include mean velocities, Reynolds stresses, and separation/reattachment points. High-resolution DNS shows very good agreement with the reference experiment. Despite the very coarse resolution, the results from WMLES with three different wall models are comparable to those from the DNS and the experiment.
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تاریخ انتشار 2014