Viscous tilting and production of vorticity in homogeneous turbulence
Abstract
Viscous depletion of vorticity is an essential and well known property of turbulent flows, balancing, in the mean, the net vorticity production associated with the vortex stretching mechanism. In this letter, we, however, demonstrate that viscous effects are not restricted to a mere destruction process, but play a more complex role in vorticity dynamics that is as important as vortex stretching. Based on the results from three dimensional particle tracking velocimetry experiments and direct numerical simulation of homogeneous and quasi-isotropic turbulence, we show that the viscous term in the vorticity equation can also locally induce production of vorticity and changes of the orientation of the vorticity vector (viscous tilting).
Additional Information
© 2010 American Institute of Physics. Received 9 February 2010; accepted 9 May 2010; published online 8 June 2010.Attached Files
Published - Holzner2010p10937Phys_Fluids.pdf
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- 19341
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- CaltechAUTHORS:20100809-120628745
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2010-08-09Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field