CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   CFX (https://www.cfd-online.com/Forums/cfx/)
-   -   define a new compressible material in cfx (https://www.cfd-online.com/Forums/cfx/235955-define-new-compressible-material-cfx.html)

Zhuhan May 7, 2021 03:22
define a new compressible material in cfx
 
Hi, researchers.
I want to get a compressible liquid(like water at 34C), and the density can vary with absolute pressure. It's based on the Tait equation. What should I do? Should I use the expression method? additional variables? or the used function?
Waiting for your reply. Thanks a lot.

Zhuhan May 7, 2021 03:25
Quote:
Originally Posted by Zhuhan (Post 803345)
Hi, researchers.
I want to get a compressible liquid(like water at 34C), and the density can vary with absolute pressure. It's based on the Tait equation. What should I do? Should I use the expression method? additional variables? or the used function?
Waiting for your reply. Thanks a lot.
Tip:
Here is my cel code.

N=7.1
D water=994.331[kg m^-3]
B=300[MPa]
stem 1=((Absolute Pressure+B)/(Psat+B))^(-N)
D l=D water*stem 1
Psat = 0.0532506[bar]

evcelica May 10, 2021 13:49
That may work, but why not just use the built in IAPWS IF97 Library material properties for water?


All times are GMT -4. The time now is 01:55.