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Published in:
2005 | OriginalPaper | Chapter
Boundary Layer Separation Influenced by Free-Stream Disturbances
Authors : Jan Wissink, Wolfgang Rodi
Published in: High Performance Computing in Science and Engineering, Munich 2004
Publisher: Springer Berlin Heidelberg
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To study the effect of free-stream fluctuations on laminar flow separation a series of Direct Numerical Simulations (DNS) is performed. The three largest computations have been carried out on the Hitachi SR8000 F1 at the Leibniz Computing Centre (LRZ) in Munich using 256 processors. The level of the free-stream disturbances in the oncoming flow is found to have a significant impact on the size of the Laminar Separation Bubble (LSB). Downstream of the separation bubble, the near wall turbulent flow is found to only slowly assume the ”normal” characteristics of a turbulent boundary layer.