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Forum: CFX

October 29, 2013, 05:00

Replies: 6

A problem about density in liquid air definition

Views: 2,151

Posted By ghorrocks

Two suggestions: 1) Your table limits are...

Two suggestions:
1) Your table limits are 0.1-1.8MPa, but your expression is only defined for 0.5-1.5MPa. You have turned on the extrapolation option. So it is going to be extrapolating to your top...

Forum: CFX

October 29, 2013, 01:03

Replies: 6

A problem about density in liquid air definition

Views: 2,151

Posted By ghorrocks

You appear to have defined your function only at...

You appear to have defined your function only at a single temperature. Doesn't this make the derivative WRT temperature undefined? So I would add a second temperature to the table and then the...

Forum: CFX

October 28, 2013, 16:53

Replies: 6

A problem about density in liquid air definition

Views: 2,151

Posted By ghorrocks

Debugging material properties is always tricky....

Debugging material properties is always tricky. But you have to look into the error message - it says your "density derivative wrt P at constant T is out of bounds", which means either a divide by...

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