January 26, 2018 at 3:12 pmlugolxySubscriberRecently I worked on meshing by Ansys workbench (Anasys 18.1) for fluent simulation. I need very fine mesh. When I set max mesh size to be 3um (The whole structure is about 1cm in size) and all tetrahedron, I got good mesh and the element number is about 400,000. Then I tried to improve the mesh and set the max mesh size to be 2.5um. However, I met an error as
A software execution error occurred inside the mesher. The process suffered an unhandled exception or ran out of usable memory
I monitored the memory usage of my windows 10 desktop with 32Gb Ram. It didn't reach to a high ram percentage. I wonder if you or anyone met this problem before and do you know a solution? Thank you very much.
January 26, 2018 at 4:14 pmraul.raghavSubscriber
Can you upload the workbench archive file so we could take a look at it?
January 26, 2018 at 5:19 pmlugolxySubscriber
Thanks a lot Rahul. Juan suggested me to re-scale it 1000 times. I tried it and it met the same problem. I also monitored the ram usage. It never exceeded 25%.
I made the geometry a little bit simpler and I could mesh the geometry by element size 2.5um, But it failed at 2um.
I uploaded the file on One Drive with the following link
Thank you very much.
January 29, 2018 at 3:41 pmraul.raghavSubscriber
Xinyu, I looked at your geometry and your meshing approach. Although the dimensions of your geometry are quite small, the geometry itself is very simple. Why do you want a very fine all tetra mesh when you can easily create a hexa mesh for your geometry? And I'm not sure what the original geometry looks like but the simplified geometry is quite straightforward to mesh. Attached is the workbench archive file with an all hexa mesh for your geometry. You can play with the sizing numbers to make it as fine as you want. Let us know if it helps you. And i took the liberty to change the named selections based on your attached file, so please make sure its consistent with your problem.
January 29, 2018 at 4:30 pmlugolxySubscriber
Thank you very much. Yes the hexa mesh is very helpful. Actually the reason I use tetra mesh is to test the difference between tetra and hexa elements. People always use hexa for this kind of simple geometry. So I'd like to test how tetra mesh affects the result. Thank you!
January 30, 2018 at 4:04 pmraul.raghavSubscriber
Xinyu, as you mentioned 2um body sizing shows the error as you mentioned, while 2.5um works. And I tried it across two computers with varying configurations and it didn't seem to make any difference. I read more about the Patch Conforming tetra mesh and it was mentioned that it was a bottom-up approach where meshing starts from the edges, surfaces and then finally the body. I tried refining it using edge and face sizings and I was able to generate a mesh with approximately 10M elements. However, even that approach eventually shows the same error below a certain size.
January 30, 2018 at 4:21 pmlugolxySubscriber
Got it. Really helpful. Thank you very much. Could you also attach the file or snipped images showing the setup that you refined edge and face first and then body mesh? I am still new to ansys workbench. Thanks.
- You must be logged in to reply to this topic.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- ANSYS Workbench Measuring within Design
- how to improve the inflation quality at sharp corners?
- check element type
- The mesh file exporter could not resolve cyclic dependencies in overlapping contact regions error
- How to resolve Mesh Failure
- Meshing Error
- Error in meshing
- Conformal vs Non-Conformal Mesh
- execution error inside the mesher. The process suffered an unhandled exception or ran out of memory
- inflation created stairstep mesh at some location
© 2023 Copyright ANSYS, Inc. All rights reserved.