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-   -   Kelvin helmholtz instability must be necessary to (http://www.cfd-online.com/Forums/cfx/25745-kelvin-helmholtz-instability-must-necessary.html)

HoJun April 29, 2008 03:12

Kelvin helmholtz instability must be necessary to
 
Hi, all In CFX v10.

I want to know that the vortex shedding arise in a sharp edge of sudden expand internal flow channel. (Re:3x10^3, air, sudden expand channel, SST model, fine mesh in the wake and edge, yplus <1)

Kelvin helmholtz instability must be necessary to do? my inlet flow is as followings.

Uy=C*sin(2*pi*t/T)


Glenn Horrocks April 29, 2008 18:49

Re: Kelvin helmholtz instability must be necessary
 
Hi,

Good quality mesh, fine enough timesteps, second order time and space differencing, simulation domain large enough.

Glenn Horrocks



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