Learning Forum

[smraniaki]

I am trying to simulate heat and mass transfer (CHT) in a thermal system consist of a curvy minimal iso-surface plus an enclosure created and checked in space claim with no problem. As it was created using an implicit trigonometric function, the geometry made of several facets (similar to .stl format) and converted to a solid body (merged faces) before transferring it to AIM for CFD simulation. However, for a small geometry, it takes too long (more than an hour) and often it crashes before importing the geometry for no reason. I don't think this is normal! I'm not even sure the problem is due to having so many discrete faces in my geometry even though they are supposed to be merged. I tried to unify them, but since it was in STL in the first place there was no way I could connect them. Any solution?

Note: My workstation has a Core i7 processor (10th GEN) with 16GB of RAM, and 6GB GPU

[Keyur Kanade]

For such complex geometries, it is not good to use command convert to solid. For creating geometry out of such complex faceted data, it is recommended to use reverse engineering tools in SpaceClaim to create geometry. This will reduce no. of faces and will get imported in AIM. nRegards,nKeyurnHow to access Ansys Online Help DocumentnHow to show full resolution imagenGuidelines on the Student CommunitynHow to use Google to search within Ansys Student Communityn

[smraniaki]

Thank you Keyur for getting back to me. I actually tried what you said, but there are two problems with this method, 1) I have two interpenetrating surfaces that its not possible to use cross-section data to re-generate the CAD model, or perhaps I couldn't because my space claim runs out of memory and crashes 2) this requires manual work, and I need to create a workflow to automate the whole process from geometry selection to meshing, running the model and post-processing resuts. The geometry you see above is just a small piece of a larger CAD model that I cropped it for the sake of simplicity for demonstration here. Same CAD model was used to run a simulation on a different CAE tool and it was fine because that tool accepted .STL file read. I'm struggling with Ansys and I believe there must be a way to resolve the issue but not sure how! n