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Boiling temperature calculation

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Old   March 31, 2013, 21:15
Thumbs up Boiling temperature calculation
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Dear All,

I am current ly writing my mater thesis in CFD and my problem is correlation of temperature calculation from star ccm+ and test results.

Problem: We have an diesel engine and it is tested. The critical point in test is much higher than our first calculation (~100 C difference) and we want to make a new simulation approach for those calculations. I need to do some calculations in STAR CCM+ and derive the best parameters for it.

I am using both Rohsenow and Transition model for two phase boiling problem.

But somehow, I cannot get close to the measured values in test and the difference is about still 30 C in some calculation (I have nearly 100 different sim files with different BC's.)

So: I wanto to know how to get more accurate values for boiling problems.

In both transition and rohsenow boiling, solid-fluid interface somehow seems to be calculated independent of the formula paramters because when I change the paramters the surface temperature dont change or some tiny changes.

looking forward to hearing from you all.
femer is offline   Reply With Quote


boiling, nucleate boiling, transition boiling, two-phase flow

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