Berkeley Fluids Seminar

February 11, 2015

Prof Helge Andersson (Department of Energy, NTNU)

Coriolis force effects on turbulent shear flows

Abstract: Flow in rotating systems are encountered in astrophysical, geophysical and industrial fluid mechanics. The presence of the Coriolis force are known to affect the mean fluid motion in geophysical applications. The shorter length and time scales in engineering devices make the Coriolis force also affect the turbulence. The talk will address Coriolis-force effects on both the mean flow and the turbulence. A variety of different shear flows of engineering relevance will be presented to illustrate the most striking flow phenomena caused by the Coriolis force. We will see that both the turbulence level and the turbulence anisotropy are changed due to system rotation and the extent of zones of separated flow varies with the rate of system rotation.

Biography: Helge Andersson is the author or co-author of more than 200 scientific papers. His research includes: Particles in turbulent flows; Bluff-body wake flows; and Flows in rotating systems. He is currently a professor in the Department of Energy and Process Engineering (Division of Fluids Engineering) at the Norwegian University of Science and Technology (NTNU). He has served as the head of the Division of Applied Mechanics at the Norwegian Institute of Technology, and did his postdoctoral study at the Theodore von Karman Institute for Fluid Dynamics in Brussels.

For personal meetings with Dr. Andersson, please contact his host: variano@ce.berkeley.edu

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Acknowledgments

Prof. Graham Fleming (Vice Chancellor for Research, UC Berkeley)

Prof. Eliot Quataert on behalf of The Theoretical Astrophysics Center and the Astronomy Department (UC Berkeley)

Prof. Philip S. Marcus on behalf of the Mechanical Engineering Department (UC Berkeley)

Prof. Michael Manga (Earth and Planetary Science, UC Berkeley)

Prof. Evan Variano (Civil and Environmental Engineering, UC Berkeley)