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Forum: Main CFD Forum

March 7, 2011, 13:22

Replies: 8

Laminar vs Turbulent Navier-Stokes

Views: 8,953

Posted By truffaldino

High-speed laminar boundary layer does not exist...

High-speed laminar boundary layer does not exist at whole lenght (as Re exceeds certain limit there is a transition to turbulence along the stream). This is an essence of turbulence, that non-chaotic...

Forum: Main CFD Forum

March 7, 2011, 12:42

Replies: 8

Laminar vs Turbulent Navier-Stokes

Views: 8,953

Posted By truffaldino

Sorry I have not read your question carefully. ...

Sorry I have not read your question carefully.
Here is the answer:
Turbulence exists on large scales too, this is not the problem of resolution, rather it is problem of stability of solution of NS...

Forum: Main CFD Forum

March 7, 2011, 11:58

Replies: 8

Laminar vs Turbulent Navier-Stokes

Views: 8,953

Posted By truffaldino

Reynolds averaged equations look like navier...

Reynolds averaged equations look like navier stokes if you forget that viscousity is now an unknown variable. Eddy viscousity changes from point to point and extra equations are needed to compute it.

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