I am making a project to simulate airflows in one of the rooms at my school, but when i do the mesh parts in simscale it takes so long and does not even get past 0%. I decided to use standard instead of hex-dominant. I have a community/academic account so i can not go past 16 cores. I have been on this issue since yesterday, I am doing the project : SimScale
I was trying to have this running by tomorrow at the latest, so i can at least know how to go on further.
Thanks
Hi!
The issue that you are running into is related to the geometry. Although the geometry looks very clean, there are a total of 8 small faces in the geometry, causing the mesh size to get very large (small details take very fine cells to capture):
Up-close, it looks like this:
I recommend deleting these fillets in your CAD tool, and re-importing the geometry. This should allow you to obtain a mesh with a reasonable size.
Cheers
So I had to go into the original cad and make sure the ceiling and walls touched the outside part of the walls when I loaded it in. I had to make an enclosure because it kept saying an infinite flow volume for a closed inner region error THEN I had to make the closed inner region. I did not know I had to do that. I do not see the fillets now, I will report back and see how it worked out sometime tomorrow. hopefully, I can actually simulate and mesh something.
Thank you so much!
Oh how cruel fate is, I made the edits and tried to use Onshape for the first time today to work on the project. I had to rename is and currently I cleaned it up to a point where the fillet issue from last time is gone, i made the fineness less than 5 but it still does not run or gives an error. I thought that this should work by now? I got this error in the mesh log for the simulation “CHT using onshape edit” :
"Maximum precision of model and its entities: 1e-08 m.
Absolute small feature tolerance: 9.99998e-06 m.
Gap refinement size is reaching lower cell size cap for 0 faces. Consider lowering model tolerance if resulting mesh fineness is too coarse.
Code: 804 String: Mesh settings may be too fine: please inspect your settings"
Do you think i shuould scale my model down some and see if it can run better?
Hi,
The mesh was failing due to additional fillets around the inlet faces, which I hadn’t previously spotted:
In any case, I believe you also were able to spot the problem in the meantime, as you have uploaded a new geometry without the fillets. The new geometry seems to be running smoothly, as I can see successful meshing and simulation operations, which is awesome!
Cheers
