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Search: Posts Made By: houkensjtu
Forum: Main CFD Forum July 15, 2012, 00:04
Replies: 23
Views: 4,488
Posted By houkensjtu
Yeah you should ensure continuity on outlet every...

Yeah you should ensure continuity on outlet every time before solving pressure correction.
As for NaN problem, I guess, because you applied 0 to all u velocity as initial guess, so when you apply
...
Forum: Main CFD Forum July 14, 2012, 04:13
Replies: 23
Views: 4,488
Posted By houkensjtu
emmm... I think it's not the problem. For...

emmm... I think it's not the problem.

For pressure correction equation, as you said it is neumann boundary condition, so pressure correction on wall side is cut. For the source term because...
Forum: Main CFD Forum July 14, 2012, 03:27
Replies: 23
Views: 4,488
Posted By houkensjtu
I read through your description briefly and I...

I read through your description briefly and I think you should apply the boundary condition of Wall3(Which as you said, ensure the continuity condition) EVERY TIME before you solve the pressure...
Forum: Main CFD Forum July 7, 2012, 23:09
Replies: 23
Views: 4,488
Posted By houkensjtu
You should check again every coefficient in your...

You should check again every coefficient in your discrete equation, especially for the boundary cell, they are extremely important! If you are following versteeg text book, you should definitely read...
Forum: Main CFD Forum August 23, 2011, 23:42
Replies: 23
Views: 4,488
Posted By houkensjtu
Be careful, do not misunderstand my point.The...

Be careful, do not misunderstand my point.The "sum" doesn't mean this term should be zero for each cell, but the overall summation of all cell should be zero.
Forum: Main CFD Forum August 23, 2011, 22:56
Replies: 23
Views: 4,488
Posted By houkensjtu
First of all,u should check if u apply the wall...

First of all,u should check if u apply the wall boundary appropriately.Because u are using staggered grid,B.C for u and v should be DIFFERENT.
Then I still suggest u to check the overall mass...
Forum: Main CFD Forum August 20, 2011, 23:26
Replies: 23
Views: 4,488
Posted By houkensjtu
TIPS for those working on SIMPLE

Hey guys!
I am a Master student and i'm programming SIMPLE method on myself.(duct flow)
I have been confused for a very very long time,and now I eventually get familiar with SIMPLE and I'd like to...
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