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Erschienen in:
2010 | OriginalPaper | Buchkapitel
The Effect of Spanwise System Rotation on Turbulent Poiseuille Flow at Very-Low-Reynolds Number
verfasst von : Oaki Iida, K. Fukudome, T. Iwata, Y. Nagano
Erschienen in: Progress in Turbulence III
Verlag: Springer Berlin Heidelberg
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Direct numerical simulations (DNSs) with a spectral method are performed with large and small computational domains to study the effects of spanwise rotation on a turbulent Poiseuille flow at the very low-Reynolds numbers. In the case without system rotation, quasi-laminar and turbulent states appear side by side in the same computational domain, which is coined as laminar-turbulence pattern. However, in the case with system rotation, the pattern disappears and flow is dominated by quasi-laminar region including very long low-speed streaks coiled by chain-like vortical structures. Increasing the Reynolds number can not generate the laminar-turbulence pattern as long as system rotation is imposed.