how to set the boundary layer in openfoam?
Hi,
I'm simulating the flow around cylinder,and I need to set a fixed length to the cylinder patch so that it can be suitable for y+. But I don't know how to do it in openfoam, could anybody can help me??:confused: Best Regards' WenY |
Dear Weny,
there are several options to get your boundary layer.
Hope it is helpful. |
[QUOTE=Tobi;492290]Dear Weny,
there are several options to get your boundary layer.
Dear Tobi, Thanks for your help. I use the blockMesh for my cylinder, But playing around with ratio settings can not get a fixed distance to the cylinder , I wanna have a fixed y+, so what can I do? Best Regards, WenY |
Quote:
Thanks for your help. I use the blockMesh for my cylinder, But playing around with ratio settings can not get a fixed distance to the cylinder , I wanna have a fixed y+, so what can I do? Best Regards, WenY http://www.cfd-online.com/Forums/ima...ser_online.gif http://www.cfd-online.com/Forums/ima...reputation.gif http://www.cfd-online.com/Forums/ima...ons/report.gif http://www.cfd-online.com/Forums/ima...c/progress.gif |
Quote:
y+ is estimated on the first cell heigth and depend also on velocity. If you have different velocitys you will get other y+ values. Can you explain your problem with a picture? That would be very recommended and other people can help you in a more specific way. |
here is my model
http://https://www.dropbox.com/s/4yx...t-cylinder.pdf I used different ways to mesh my model, but get different results of the dragcoeff. I want to know whether the results is related to the mesh condition, or something else? |
Quote:
I'm sorry the picture may fail to upload, I just try it again. There is another problem in my simulation: when I used blockMesh to mesh the model, the result was reasonable, But when I used gambit to mesh, the result was wrong. I guess it might be the cause of a wrong boundary or intial conditions.https://www.dropbox.com/s/4yx55pnwi8...t-cylinder.pdf It's really very kind of U to help me! |
Quote:
thanks a lot |
All times are GMT -4. The time now is 12:07. |