Turbulence, instabilities and heat transfer in rotating channel flow simulations
Brethouwer G, Wei L, Schlatter P, Johansson AV (2012)
Publication Type: Conference contribution
Publication year: 2012
Publisher: Begell House Inc.
Book Volume: 2012-September
Pages Range: 703-706
Conference Proceedings Title: Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer
Event location: Palermo, ITA
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.760
Abstract
Direct numerical simulations of fully developed turbulent channel flow rotating about the spanwise direction are performed over a wide range of Reynolds numbers and rotation speeds. A scalar is also included to examine rotation effects on heat transfer. The Reynolds number based on the bulk mean velocity is up to 30 000, which is higher than in previous studies of rotating channel flow. The flow partly or completely relaminarizes on the stable channel side at sufficiently high rotation speeds, leading to distinct turbulent-laminar patterns in certain cases. Strong cyclic bursts of turbulence are observed at higher rotation speeds and sufficiently high Reynolds numbers. Further analysis showed that the burst are caused by plane spanwise waves with a rapidly growing amplitude, which become unstable after some time and break down into intense turbulence. Rotation strongly affects the direction of the turbulent scalar flux and significantly reduces the turbulent Prandtl number.
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APA:
Brethouwer, G., Wei, L., Schlatter, P., & Johansson, A.V. (2012). Turbulence, instabilities and heat transfer in rotating channel flow simulations. In Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer (pp. 703-706). Palermo, ITA: Begell House Inc..
MLA:
Brethouwer, G., et al. "Turbulence, instabilities and heat transfer in rotating channel flow simulations." Proceedings of the 7th International Symposium On Turbulence, Heat and Mass Transfer, THMT 2012, Palermo, ITA Begell House Inc., 2012. 703-706.
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