Importing and merging multiple existing STL fluid bodies into MFiX?

MFiX How to
#1

I have multiple existing STL fluid bodies that I am trying to merge into a single mesh domain in MFiX. Is this possible at all to do within MFiX? I tried but it didn’t seem to work - it looked like the operation was successful but the merged surfaces were still external faces and not internal. Would it be better to preprocess things so that a single STL is imported that includes the entire fluid domain?

#2

You need to make sure all normal vectors point in the correct direction, i.e. towards the fluid region.

#3

Thanks - that was one of the first things I checked, but it still didn’t seem to work. Are there any other things to look out for?

#4

Please check that there are no holes or thin triangles in the STL files, and that they form a waterproof body.

Feel free to share your files if you want someone to take a look.