Am getting very strange pressure/velocity problems at the inlet after a while
5 Attachment(s)
Dear all,
I have been trying for a while now to simulate a 2D incompressible flow past a square cylinder using k-omega model and to obtain convergency. After creating the blockMesh and 0 files and system directories, I have managed to get the simulation started and it works fine for a while, but then it starts working wrong. |
part_2
5 Attachment(s)
Here are the rest of the files from OpenFoam.
Thank you very much. |
What is goining wrong?
|
5 Attachment(s)
First of all, thank you for your reply. I will upload some screenshots with the flow development for U,p and k in order to show you exactly what i get.
|
Quick answers:
|
Ahhhh, i didn't think about total pressure. Thank you very much, I will start the simulation again, hopefully this time works.
In addition to my previous question, is it possible to define the inlet as a single patch? Instead of doing it block by block, just define the upper and lower edger for the whole inlet. |
Quick answers:
Quote:
If you want to use only blockMesh... uh... Maybe use Blender with the SwiftBlock add-on? https://openfoamwiki.net/index.php/Contrib/SwiftBlock |
Thank you for your reply.
I have tried what you said about total pressure and the simulation is still not working. I get the same problem after a number of iterations. |
Hello.
Why You are using those velocity and pressure inlets and outlets? I think Your simulation crashes when pressure wave reach inlet. Try to use different velocity and pressure inlet BC. https://www.openfoam.com/documentati...conditions.php Search for Inlet and Outlet BC. For example: Quote:
|
Quick suggestion: This blog post has a ton of information on how to set-up these kinds of simulations: http://matveichev.blogspot.com/2014/...ex-street.html
|
All times are GMT -4. The time now is 16:03. |