[Grandalf le Blond]

Hello everyone!

First of all, thank you all for the support provided by this forum. It helped me resolve many issues but there is one I could not overcome.

The issue is the following: I have nine fluid/solid bodies that touch each other in SpaceClaim. The geometry is nice according to the "check geometry tool", but once I scale up all the bodies together, for example with a factor 2, some surfaces and vertexes become bad, inducing serious topology errors. The geometry "looks" good though.

Some context: I am trying to simulate heat transfer from one fluid to another fluid in a heat exchanger with a triply period minimal surface (TPMS) structure (picture in the attached files). I generated the solid body in an external software, and imported it in SC as .stl file. I know I should clean it in a CAD software but I want to use the tools provided in Ansys Workbench. Thus, the interface between the solid and the fluid bodies is made up of many small surfaces, even after the "regularize" tool. The case is then meshed and solved in Fluent.

So my question is: Is there a way to force the bodies to stay attached during the scale-up? I feel like the high number of surfaces induce these errors, but the meshing and equations-solving parts are fine...

I thank you in advance.