CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Search Results

Register Blogs Community New Posts Updated Threads Search

Showing results 1 to 7 of 7
Search took 0.00 seconds. Search: Posts Made By: scttmllr
Forum: OpenFOAM Running, Solving & CFD September 24, 2010, 15:55
Replies: 72
Views: 31,110
Posted By scttmllr
Hi Richard, In your eqn (4), you would want...

Hi Richard,

In your eqn (4), you would want the LHS term to be of the form "U * div(alpha1)" in order for alpha1 to remain bounded. If you subtract an "alpha1 * divU" from each side of (4), you...
Forum: OpenFOAM Running, Solving & CFD April 7, 2010, 10:29
Replies: 72
Views: 31,110
Posted By scttmllr
The only difference comes from writing: U...

The only difference comes from writing:

U \cdot \nabla P = \nabla \cdot (U P) - P \nabla \cdot U

Why is this done? I suppose it is to write it into more of a "standard" form (i.e. div(U*P) )...
Forum: OpenFOAM Running, Solving & CFD April 7, 2010, 09:50
Replies: 72
Views: 31,110
Posted By scttmllr
Hi, Yes, it looks like you have it almost...

Hi,

Yes, it looks like you have it almost correct now. The last term where you have div(U*grad(P)) isn't quite there. The pEqnIncomp terms come from a div(U) in the continuity equation. The U...
Forum: OpenFOAM Running, Solving & CFD March 25, 2010, 21:30
Replies: 72
Views: 31,110
Posted By scttmllr
Nat, Thanks for the reply. In your...

Nat,

Thanks for the reply. In your equations, do you still express density as \rho = \sum_i \bar{Y}_i \rho_i ? If so, I cannot see how the two equations on your second line are consistent. I...
Forum: OpenFOAM Running, Solving & CFD March 19, 2010, 06:59
Replies: 72
Views: 31,110
Posted By scttmllr
Hi, My derivations look the same as yours. ...

Hi,

My derivations look the same as yours. I also do not agree with the coefficient of pEqnComp in the solve() function (your [7]). I think it should just be (1/rho)*d(rho)/d(p) = (alpha1*psi1 +...
Forum: OpenFOAM Running, Solving & CFD March 18, 2010, 18:48
Replies: 72
Views: 31,110
Posted By scttmllr
Hi Hamed, I'm still not positive what it is...

Hi Hamed,

I'm still not positive what it is and where it comes from, but I'm up for a discussion on it.

-STM
Forum: OpenFOAM Running, Solving & CFD December 10, 2009, 16:51
Replies: 72
Views: 31,110
Posted By scttmllr
Formulation in compressibleInterFoam

Hi,

I am wondering if someone can help me out with the derivation of the implementation used in compressibleInterFoam.

1. Where does the `dgdt' term come from that is used as a source for...
Showing results 1 to 7 of 7

 
Forum Jump

All times are GMT -4. The time now is 19:22.

Contact Us - CFD Online - Privacy Statement - Top