Colorado State University
Hydrodynamic Mushroom Research
By Peter Vorobieff
From Department of Mechanical Engineering
University of New Mexico
When May 1, 2006
1:00 pm
Where Room 202, Weber Building
Abstract In many high-speed compressible mixing flows, the dominant flow structure manifests itself as a pair of counter-rotating vortex columns with species mixing in the flow being advected into the vortex cores and mixed. The flow pattern associated with this vortex pair often resembles a mushroom (hence the title of the talk). The primary instability leading to the formation of the vortex pair may vary from flow to flow, however, the secondary, smaller-scale instabilities largely responsible for the mixing are the same - driven by shear in the plane normal to the large-scale vortex cores, driven by the misalignment between pressure and density gradients in the same plane, or developing along the axis of the large-scale vortex. In this talk, we present experimental and numerical studies of several flows exhibiting similar behaviour, wherein mixing is driven by a pair of large-scale vortices and greatly enhanced by secondary flow instabilities.
Further Information Vakhtang Putkaradze
There will be Refreshments in WB117 at 2.00pm, following the Colloquium.
The Colloquium counts as Seminar Credit for Mathematics Students.