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Reattachment length backward facing step

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Old   December 2, 2018, 21:52
Default Reattachment length backward facing step
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Natan Alexandre de Oliveira
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Hi there,

im thinking about the benchmark backward facing step: if a consider a distance from the step, the magnitude of vorticity in the wall will behavior in a region of growing of the vorticity going to the max value and then a region were the magnitude of vorticity tends to zero.

Can i consider this second region, where the vorticity goes to zero as the region of reattachment lenght.

thanks.
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Old   December 3, 2018, 08:02
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Filippo Maria Denaro
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Quote:
Originally Posted by natan.oliveira View Post
Hi there,

im thinking about the benchmark backward facing step: if a consider a distance from the step, the magnitude of vorticity in the wall will behavior in a region of growing of the vorticity going to the max value and then a region were the magnitude of vorticity tends to zero.

Can i consider this second region, where the vorticity goes to zero as the region of reattachment lenght.

thanks.



I do not understand your question. In general, the reattachment lenght is defined along the locus of ponts of zero vorticity (3d and unsteady) but on a wall there is no general region for which vorticity tends to zero. At least for viscous flows.
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