Can any one tell me about any computatinal work done with reference to sudden perturbations as applied to turbulent boundary layers.
A sudden perturbation can be classified as a perturbation applied in the form of surface roughness patch e.g. smoth-rogh-smooth or as heat hot-cold -hot .It can also be in the form of suddenly applied pressure gradient and then removing the PG. It means that preturbation does not last long .. but i applied and flow is left to relax.there is a lot of experimental work on the subject but i am unable to find any computational work. also if anyone has done some work on application of sudden perturabtions.
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