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Forum: OpenFOAM Running, Solving & CFD April 20, 2005, 14:31
Replies: 27
Views: 6,405
Posted By sung
I can not find it from the man

I can not find it from the manual. Probally they do it secretly;)
Thanks again for all your help!
Forum: OpenFOAM Running, Solving & CFD April 20, 2005, 13:41
Replies: 27
Views: 6,405
Posted By sung
For Fidap, we set boundary con

For Fidap, we set boundary condition for outlets as:

BCFLUX( ADD, N3, ENTITY="outlet", CONSTANT=0.0 )
According to the Fidap manual:
BCFLUX: "normal component of total normal stress",
and...
Forum: OpenFOAM Running, Solving & CFD April 20, 2005, 02:35
Replies: 27
Views: 6,405
Posted By sung
Hi Hrv, Thanks. Could you poi

Hi Hrv,
Thanks. Could you point out a reference dealing with the outflow split for me?
Forum: OpenFOAM Running, Solving & CFD April 20, 2005, 01:35
Replies: 27
Views: 6,405
Posted By sung
I have not done the outflow sp

I have not done the outflow split stuff before. We run the same geometry with Fidap, it works. However, in Fidap, users only need to specify the velocity BCs for inlet and outlets (fixed flux for...
Forum: OpenFOAM Running, Solving & CFD April 19, 2005, 15:18
Replies: 27
Views: 6,405
Posted By sung
Hi Henry Thanks for so many i

Hi Henry
Thanks for so many informative responses.
I am running the simpleFoam for a pipe with multiple outlets. Can I still set all of the outlets to be zeroGradient pressure and velocity? Some...
Forum: OpenFOAM Running, Solving & CFD April 12, 2005, 14:25
Replies: 27
Views: 6,405
Posted By sung
Yes, the initial U was (0 0 0)

Yes, the initial U was (0 0 0). After I restart it from the solution of fixedValue p, it works;) So, can we conclude that the zeroGradient pressure BC is quite sensitive to the initial condition?...
Forum: OpenFOAM Running, Solving & CFD April 12, 2005, 13:30
Replies: 27
Views: 6,405
Posted By sung
Hi Henry, Thanks for offering

Hi Henry,
Thanks for offering me so much help.

In the tutorial's simpleFoam directory, there is a sample case "pitzDaily", the geometry is quite similar to my problem. The outlet pressure BC...
Forum: OpenFOAM Running, Solving & CFD April 11, 2005, 15:41
Replies: 27
Views: 6,405
Posted By sung
Hi Henry, Yes, I do not reall

Hi Henry,
Yes, I do not really care where is the reference zero pressure. I will just keep it to be default value. When I apply my solver to a simple 3 dimensional straight duct flow problem with...
Forum: OpenFOAM Running, Solving & CFD April 11, 2005, 15:01
Replies: 27
Views: 6,405
Posted By sung
Oh, I do keep this part of cod

Oh, I do keep this part of code from icoFoam.C. So the problem is where should I provide the reference cell label and value? Is it in the file of 0/p or some where else? The default values seem to...
Forum: OpenFOAM Running, Solving & CFD April 11, 2005, 13:36
Replies: 27
Views: 6,405
Posted By sung
Thanks Henry, Probably this

Thanks Henry,
Probably this is the reason my job get killed. Is there any similar code in the OpenFoam package I could follow to set the reference cell?
Forum: OpenFOAM Running, Solving & CFD April 11, 2005, 13:09
Replies: 27
Views: 6,405
Posted By sung
I create a solver based on ico

I create a solver based on icoFoam.C by adding a piece of code before the pressure solution used to scale the flux on the outlet boundary to satisfy
global continuity (refered to Dr. Hrvoje Jasak's...
Forum: OpenFOAM Running, Solving & CFD April 11, 2005, 01:13
Replies: 27
Views: 6,405
Posted By sung
Does anyone have the experienc

Does anyone have the experience dealing with outlet boundary condition by setting zero pressure gradient and zero velocity gradient. Some sigular point always arise and my job gets killed.
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