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phase change of water to water vapor by hot gas flow

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Old   December 1, 2014, 03:42
Default phase change of water to water vapor by hot gas flow
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dhiraj
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hi
i m doing phase change problem in cfx which consist of fuel and water enter from top and hot gases from bottom side.
How do i model such problem? so that water get transformed into water vapor?

If anyone is aware of such problem, please let me know.
Thank you
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Old   December 5, 2014, 01:02
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Hi everyone

I tried with HBM, but as i know it only works for single phase problem. I didn't get any idea- how the water gets transformed into water vapor by taking away heat from hot gases.

Please help me to solve this problem.
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Old   December 5, 2014, 07:20
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You'll probably need the thermal phase change model.
This model is not intended for novices - and there arent' any tutorials that I know of using this model. Theory of this model is in the theory guide.
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Old   December 8, 2014, 02:55
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Quote:
Originally Posted by RicochetJ View Post
You'll probably need the thermal phase change model.
This model is not intended for novices - and there arent' any tutorials that I know of using this model. Theory of this model is in the theory guide.
Thank you Mr. Ricochet
I used Thermal change model with saturation temperature but this is not working properly here.
I modeled this problem as 4 phases- water, water vapor, fuel and gas. As water has some fraction at start so after completion of solve it shows water vapor fractions towards the fuel outlet boundary, which is not correct. It should be observed towards gas outlet boundary, as vapor density is lower than water and fuel.
Here in this problem water is at the start and it gets converted into vapor by taking heat from gases. How do i model this to get correct answer?
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