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Search: Posts Made By: billy
Forum: OpenFOAM Running, Solving & CFD May 10, 2007, 10:35
Replies: 19
Views: 1,513
Posted By billy
Actually I tried with 10 layer

Actually I tried with 10 layers and it blows up. Courant just increases to infinity. There is an inlet, outlet and all other surfaces are walls. I will try another geometry to see what happens.
...
Forum: OpenFOAM Running, Solving & CFD May 9, 2007, 19:44
Replies: 19
Views: 1,513
Posted By billy
1) I am trying to simulate the

1) I am trying to simulate the flow inside a thin plate. I want to use several layers because I might have a temperature variation across thickness that I want to capture. This way I would solve...
Forum: OpenFOAM Running, Solving & CFD May 9, 2007, 17:42
Replies: 19
Views: 1,513
Posted By billy
The gradient seems ok. The pro

The gradient seems ok. The problem is the value. Anyone have suggestions why this happens? It almost looks like the pressure is per layer.
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 19:30
Replies: 19
Views: 1,513
Posted By billy
I believe the reference pressu

I believe the reference pressure is only important in closed cavities. This case the outlet is set to zero.
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 19:20
Replies: 19
Views: 1,513
Posted By billy
I post two more figures with i

I post two more figures with icoFoam.

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/4424.jpg

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/4425.jpg
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 19:15
Replies: 19
Views: 1,513
Posted By billy
Patch 0 is inlet, Patch 1 is

Patch 0 is inlet,
Patch 1 is outlet,
Patch 2 is wall,
Patch 3 is wall.

Rafael,

I don't think it has to do with mesh density. The figures were done with interFoam and two fluids but...
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 19:12
Replies: 19
Views: 1,513
Posted By billy
You may have to set inlet velo

You may have to set inlet velocity like

0.1, 0, 0.
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 18:54
Replies: 19
Views: 1,513
Posted By billy
I wasn't able to include secon

I wasn't able to include second case because it is bigger than 50k. But if you have Gmsh, the number of layer can be changed edting line 3:

l = 2.

Then running gmshToFoam.
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 18:38
Replies: 19
Views: 1,513
Posted By billy
Thanks. Two test cases are inc

Thanks. Two test cases are included: one and two layer hex meshes.

http://www.cfd-online.com/OpenFOAM_Discus/icons/attachment_icon.gif hexlayer1.tgz...
Forum: OpenFOAM Running, Solving & CFD May 8, 2007, 17:45
Replies: 19
Views: 1,513
Posted By billy
Does anyone know why this happ

Does anyone know why this happens? Don't want this topic to die.
Forum: OpenFOAM Running, Solving & CFD May 7, 2007, 15:41
Replies: 19
Views: 1,513
Posted By billy
Basically the pressure seems t

Basically the pressure seems to increase at the same rate the volume of the cell decreases.
Forum: OpenFOAM Running, Solving & CFD May 7, 2007, 11:16
Replies: 19
Views: 1,513
Posted By billy
The figure shows pressure cont

The figure shows pressure contours around the inlet. The outlet is located on other side.
Both domains have same thickness.
Forum: OpenFOAM Running, Solving & CFD May 6, 2007, 19:15
Replies: 19
Views: 1,513
Posted By billy
I also tried a grid with one a

I also tried a grid with one and two layers, the pressure is increases in the same degree that the layers increase.

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/4380.jpg
...
Forum: OpenFOAM Running, Solving & CFD May 6, 2007, 19:15
Replies: 19
Views: 1,513
Posted By billy
I also tried a grid with one a

I also tried a grid with one and two layers, the pressure is increases in the same degree that the layers increase.

http://www.cfd-online.com/OpenFOAM_Discus/clipart/your_image.gif
...
Forum: OpenFOAM Running, Solving & CFD May 6, 2007, 10:46
Replies: 19
Views: 1,513
Posted By billy
Increasing even more, using a

Increasing even more, using a 60x60 grid gives very high pressure range like -1E+4-1E+4.

Billy.
Forum: OpenFOAM Running, Solving & CFD May 5, 2007, 23:36
Replies: 19
Views: 1,513
Posted By billy
Hi, I was running icoFoam w

Hi,

I was running icoFoam with lid-drive cvavity and I noticed that pressure changed in same degree, as I refined the mesh. Doubling the cells in xy direction, the pressure doubles also....
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