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SUMMARY:Stratified shear instabilities at low Prandtl number - Pascale Gar
 aud (University of California\, Santa Cruz)
DTSTART:20220516T111500Z
DTEND:20220516T121500Z
UID:TALK173534@talks.cam.ac.uk
DESCRIPTION:Shear is an important source of turbulence and mixing in the s
 tably stratified regions of stars. An important difference between shear-i
 nduced mixing in stars and in geophysical flows is the Prandtl number\, wh
 ich is of order 1 in the latter\, but asymptotically small in the former.&
 nbsp\; At low Prandtl number\, it is possible to have flows that have a hi
 gh&nbsp\;Reynolds number\, but that at the same time are thermally diffusi
 ve. This always happens&nbsp\;at the smaller scales\, and sometimes also h
 appens&nbsp\;on the larger scales\, leading to several different&nbsp\;reg
 imes for stratified mixing. I will review what is known of shear-induced m
 ixing at low Prandtl number\, for vertical shear instabilities\, and for h
 orizontal shear instabilities.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
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