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How to set Water in fluent to compressible?

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Old   October 28, 2004, 05:10
Default How to set Water in fluent to compressible?
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Christian FH Biel
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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
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Old   October 28, 2004, 09:08
Default Re: How to set Water in fluent to compressible?
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rossc
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A ben voilą on cherche de l'aide?
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Old   October 29, 2004, 01:33
Default Re: How to set Water in fluent to compressible?
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Philipp Beierer
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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
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Old   October 29, 2004, 08:06
Default Re: How to set Water in fluent to compressible?
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Christian FH Biel
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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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