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Search took 0.00 seconds. Search: Posts Made By: pechwang
Forum: OpenFOAM June 13, 2013, 08:24
Replies: 19
Views: 4,827
Posted By pechwang
Hi Tobi, Yes, I used adjust time step in...

Hi Tobi,

Yes, I used adjust time step in the simple case once. The simple case didn't work on you comoputer? I'm kind of confusing now. It worked on my computer. But I didn't use parallel...
Forum: OpenFOAM June 12, 2013, 08:27
Replies: 19
Views: 4,827
Posted By pechwang
Yes. The setup is right for the simple geometry....

Yes. The setup is right for the simple geometry. Since the complex had some problems, one of my friend changed the boundary conditions to zero pressure on the two parallel walls. But I think that was...
Forum: OpenFOAM June 11, 2013, 16:14
Replies: 19
Views: 4,827
Posted By pechwang
Thanks Tobi. What are the small pyramids on the...

Thanks Tobi. What are the small pyramids on the top surface? Maybe the blockMeshDict file is broken. I attach a new one for you. Does the simple geometry work?
Forum: OpenFOAM June 11, 2013, 15:42
Replies: 19
Views: 4,827
Posted By pechwang
Hi Tobi, I cannot see the picture. But yes,...

Hi Tobi,

I cannot see the picture. But yes, inlet is inner radius and outlet is outer raidus. I use cyclic boundary condition on the two side walls. Basiclly it is a part of the whole 360 model....
Forum: OpenFOAM June 11, 2013, 15:20
Replies: 19
Views: 4,827
Posted By pechwang
Hi Tobi, I copied them from the dambreak...

Hi Tobi,

I copied them from the dambreak tutorial. I only made some small changes on them.

Thanks,
Pengchuan
Forum: OpenFOAM June 11, 2013, 14:37
Replies: 19
Views: 4,827
Posted By pechwang
Hi Tobi, Thank you for your reply. Both my...

Hi Tobi,

Thank you for your reply. Both my simple geometry and complex geometry are in 3D. I use blockMesh to generate basic hex cells. I generate the blockMeshDict file by hand. And both meshes...
Forum: OpenFOAM June 10, 2013, 21:17
Replies: 19
Views: 4,827
Posted By pechwang
Hi Mohsen, Thank you for your reply. I did...

Hi Mohsen,

Thank you for your reply. I did use the adjust time step and I did exactly the same as the tutorial. What confused me was the same setup worked for the simple geometry but it didn't...
Forum: OpenFOAM June 10, 2013, 09:18
Replies: 19
Views: 4,827
Posted By pechwang
Hi Thomas, I set the maximum Courant to...

Hi Thomas,

I set the maximum Courant to 0.25 and the maximum time step is 1. However, when I monitored the Courant number, it changed so fast that it changed from 0.2 to around 3000 in one time...
Forum: OpenFOAM May 28, 2013, 21:38
Replies: 19
Views: 4,827
Posted By pechwang
Hi, I used adjust time step, the time step...

Hi,

I used adjust time step, the time step will change based on the previous courant number. But right now, I have no idea.
Forum: OpenFOAM May 28, 2013, 14:40
Replies: 19
Views: 4,827
Posted By pechwang
Courant number goes crazy

Hello everyone,

I'm new to OpenFOAM. I'm using interFoam to simulate a simple two-phase flow. First I used a very simple geometry, it worked very well. Then I moved that to a complex geometry,...
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