Symmetry BC

looee · April 21, 2019, 18:07

Hello Everyone!

I want to modelate part of a simple heat exchanger in CFX. It includes two tube plates with 9907 straight pipes. Actually I'm not needed in tube plates in CFX, I just want to calculate some parameters (Temperature, average density, average steam quality, etc.) along the pipes.
For this problem I chose following base cell (even half of it).
The question is: What happen if I choose all BC (of couse except inlet and outlet) as a symmetry BC? Ansys will start think that geomerty looks like an arrow 1, or like infinite lattice (arrow 2)?

Gert-Jan · April 23, 2019, 03:21

You can model everything as symmetry. I think you can even reduce your model to 1/12 of a single tube.

looee · April 23, 2019, 09:58

Quote:

Originally Posted by Gert-Jan

You can model everything as symmetry. I think you can even reduce your model to 1/12 of a single tube.

Thank you for advice. I'll try 1/12

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April 23, 2019, 03:21		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,835 Rep Power: 27	You can model everything as symmetry. I think you can even reduce your model to 1/12 of a single tube.