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-   -   How to set Water in fluent to compressible? (http://www.cfd-online.com/Forums/fluent/34944-how-set-water-fluent-compressible.html)

Christian FH Biel October 28, 2004 05:10

How to set Water in fluent to compressible?
 
Hi there I need to set the material "water-liquid" to compressible for a evalution of the wavereflexionlaw in my Geometrie. If I simulate it with Air all works great. just need to get a wave into water. I tried it with a udf "pressure depended density" but I don't get a wave into the system.

thx

rossc October 28, 2004 09:08

Re: How to set Water in fluent to compressible?
 
A ben voilą on cherche de l'aide?

Philipp Beierer October 29, 2004 01:33

Re: How to set Water in fluent to compressible?
 
Fluent treats all liquids as incompressible. Hence, the only possibility is--as you already tried--to write your own udf. Special care must also be given to the numerics since you have a hyperbolic (equations) problem. Good Luck!

Philipp

Christian FH Biel October 29, 2004 08:06

Re: How to set Water in fluent to compressible?
 
Thx Philipp Beierer As I changed the solver to "coupled implicit" my problem was solved. the udf was causing the divergence. Now it works.


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