Mathematical
Colloquium
Colloquium
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.
The Colloquium counts as Seminar Credit for Mathematics Students.