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

Search Results

Register Blogs Members List Search Today's Posts Mark Forums Read

Showing results 1 to 11 of 11
Search took 0.00 seconds. Search: Posts Made By: dowlee
Forum: OpenFOAM Running, Solving & CFD June 24, 2014, 06:40
Replies: 30
Views: 4,522
Posted By dowlee
As I know, OpenFOAM is very sensitive to the mesh...

As I know, OpenFOAM is very sensitive to the mesh quality. You should make checkMesh happy. In your case, it complains two problems, especially the under-determined cells may effect the convergence...
Forum: OpenFOAM Running, Solving & CFD June 24, 2014, 04:09
Replies: 30
Views: 4,522
Posted By dowlee
Hi I think mostly this is related to the mesh....

Hi I think mostly this is related to the mesh. implement the following command and have a look at the mesh quality,
checkMesh -allTopology -allGeometry -constant

now the newest version for...
Forum: OpenFOAM Running, Solving & CFD May 27, 2014, 03:43
Replies: 30
Views: 4,522
Posted By dowlee
Hi sam, try in the following, 1) at inlet,...

Hi sam, try in the following,
1) at inlet, specify total pressure, total temperature and direction of velocity direction
2)at outlet, specify static pressure, its value can be slightly lower than...
Forum: OpenFOAM Running, Solving & CFD May 22, 2014, 03:40
Replies: 30
Views: 4,522
Posted By dowlee
I suggest you first run this case with low...

I suggest you first run this case with low ratating speed and at the same time by reducing the pressure difference between the inlet and outlet. If this works, then you can run the case with the...
Forum: OpenFOAM Running, Solving & CFD May 19, 2014, 06:45
Replies: 30
Views: 4,522
Posted By dowlee
Hi my email address is buaaliweiwei@126.com

Hi my email address is buaaliweiwei@126.com
Forum: OpenFOAM Running, Solving & CFD May 19, 2014, 05:38
Replies: 30
Views: 4,522
Posted By dowlee
Please neglect the warning. I have also met these...

Please neglect the warning. I have also met these warnings. the turbulent quantity "omega" has negative values, I suggest you turn off the turbulent and calculate laminar flow first.
Forum: OpenFOAM Running, Solving & CFD May 19, 2014, 05:31
Replies: 30
Views: 4,522
Posted By dowlee
Hi, I am sorry that I am very busy recently to...

Hi, I am sorry that I am very busy recently to reply to you late. There seem to be no problems for your case. for the outlet pressure boundary, you can use "inletOutlet"instead of "zeroGradient" to...
Forum: OpenFOAM Running, Solving & CFD May 19, 2014, 05:19
Replies: 30
Views: 4,522
Posted By dowlee
Hi It means the number of blade. You need to...

Hi It means the number of blade. You need to specify the blade number for the inlet and the outlet.
Forum: OpenFOAM Running, Solving & CFD May 15, 2014, 04:45
Replies: 30
Views: 4,522
Posted By dowlee
Hi, you will download the folder named...

Hi, you will download the folder named densityBasedSolver in http://sourceforge.net/projects/openfoam-extend/.
There are some tutorials provided by Brom in the directory "densityBasedSolver/run"
Forum: OpenFOAM Running, Solving & CFD May 14, 2014, 04:09
Replies: 30
Views: 4,522
Posted By dowlee
Hi, Sam 1. I have a look at the attached files....

Hi, Sam
1. I have a look at the attached files. For the inlet boundary, total pressure, total temperature and flow direction are usually specified. I find that you did not set the inlet flow...
Forum: OpenFOAM Running, Solving & CFD May 9, 2014, 17:06
Replies: 30
Views: 4,522
Posted By dowlee
hi sam please list more detail about what you...

hi sam
please list more detail about what you want to know. rencently i am doing rans simulation by using transonicMRFDyMFoam for compressor.
Showing results 1 to 11 of 11

 
Forum Jump

All times are GMT -4. The time now is 12:55.

Contact Us - CFD Online - Privacy Statement - Top