|July 2, 2006, 23:10||
momentum equation (Normal to wall_
It is well-known that no-slip BCs (u,v,w =0) has been typically applied to stationary wall boundary.
For those of the tangential momentum equation, we can apply the laminar/wall function approach to simulate the effect of wall on the tangential velocity.
How about for the normal momentum equation? I am wondering abt the discretization of momentum equation (normal to the wall) at cell adjacent to the wall boundary, in a cell-centered SIMPLE solver.
The reason I am asking this question is: As I include the Buoyancy term into the z-momentum equation (parallel to gravitational acceleration), i can see some "rising stream" near the ceiling (due to T>Tavg) and "descending stream" near the floor (due to T<Tavg), which is physically non-existence after I have simulated the problem using commercial code. I have quite doubtful about my implementation of my z-momentum discretization at the wall..
|Thread||Thread Starter||Forum||Replies||Last Post|
|tmerge utility creates unwanted interface/walls comes in the final firstname.lastname@example.org||OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ...||11||January 20, 2012 07:23|
|Constant velocity of the material||Sas||CFX||15||July 13, 2010 08:56|
|Derivation of Momentum Equation in Integral Form||Demonwolf||Main CFD Forum||2||October 29, 2009 20:53|
|Momentum equation of Darcy's law||sambatra||OpenFOAM Running, Solving & CFD||2||April 17, 2009 03:27|
|Problem with momentum equation||Francisco||Main CFD Forum||4||August 5, 2004 20:04|