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Please**need help on Tow phase flow ( water & steam water) analysis**

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Old   December 19, 2013, 03:42
Default Please**need help on Tow phase flow ( water & steam water) analysis**
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ali
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Dear friends
i want to model a cylindrical porous domain which has inlet at the bottom and outlet at top. porous has heat generation which make some water to become vapor. i modeled it as follow:

1- I defined one continuous fluid as water and one dispersed fluid as water steam ( bubble size 0.002 m) with IPWS F97 mat properties.
2- use of mixture model without free surface model
3- thermal energy
4- particle model
5- thermal phase change with saturation temperature
6- two resistance , zero resistance and ranze marshal models have been implemented.

i try to run this problem for 1.014 bar domain pressure with 100 C saturation temperature which was successfuland two phase flow is performed.

MY PROBLEM :
BUT when i want to run it for higher pressure like 55 bar with 270 C saturation temperature, water don't become two phase and water temperature increases more than saturation temperature without phase change.

what should i do please help me.
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Old   December 19, 2013, 04:24
Default hi
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ali
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is there any body to help me
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Old   December 19, 2013, 17:15
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Have you covered the basics? http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F
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