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Forum: CFX

March 17, 2017, 09:23

Replies: 11

expression

Views: 1,296

Posted By Pumba

yes of course, Heat capacity affects Temperature...

yes of course, Heat capacity affects Temperature -> Temperature affects density

Forum: CFX

March 17, 2017, 08:34

Replies: 11

expression

Views: 1,296

Posted By Pumba

you are asking the wrong questions. why does your...

you are asking the wrong questions. why does your temperature exceed 1253 [C]? Is your equation for the density even valid at that temperature?

What are you trying to simulate? Oil at over 1250°C...

Forum: CFX

March 17, 2017, 02:25

Replies: 11

expression

Views: 1,296

Posted By Pumba

But don't forget to check what caused the density...

But don't forget to check what caused the density to become negative in the first place. Artificial limits can lead to unphysical results

Forum: CFX

March 16, 2017, 17:59

Replies: 11

expression

Views: 1,296

Posted By Pumba

you could set a lower limit to your density...

you could set a lower limit to your density expression ( max(500[kg m^-3],yourExpression) ) just to get it running.

Then you could evaluate the unbounded expression in cfd post and look where...

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