|August 14, 2007, 15:30||
convective boundary condition for outflow BC
I have used the convective BC for outflow condition in my code. However, I am not quite understand that how to set the outflow condition for a variable shear to the outlet.
For instance, for an backstep test, the fluid flow from the left to right, and I set this direction as U(which is normal to the outlet), clearly, the U at outlet can be solved with CBC condition equation,
Un[i] = U[i] - c*(U[i]-U[i-1])*dt/dx , c is some const speed
My question is that how to solve the V and W at the outlet? Use the same way or just set them to zero?
I have also heard that if the Peclet Number is huge, then we need no BC for the outflow, is it right?
|Thread||Thread Starter||Forum||Replies||Last Post|
|Convective boundary condition||andrea_barbera||OpenFOAM Running, Solving & CFD||4||March 4, 2010 05:36|
|convective boundary condition||Mani||CFX||7||February 2, 2008 17:25|
|Convective Boundary Condition||garni||FLUENT||0||September 25, 2005 13:00|
|Trimmed cell and embedded refinement mesh conversion issues||michele||OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ...||2||July 15, 2005 04:15|
|Convective boundary condition||STN||Main CFD Forum||5||May 29, 2002 08:47|