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Old   May 30, 2007, 13:45
Default Phase Change Injector
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Federico Bruni
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I have to simulate nitrous oxide vaporization/atomization through a injector in a combustion chamber. I need to test spray shape and atomization too. I tried to set non homogeneous turbolence and isothermal model as first. I imposed the mass flux at inlet and pressure at the outlet. Two fluid (NItrous Oxide Gas and Liquid) constitute the domain. How can I set the two liquid interface and phase change? I tried to run the simulation but I have overflow error and solver impose the wall condition at the outlet to prevent fluid flows into the domain...

Thank you for help

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Old   May 30, 2007, 13:52
Default Re: Phase Change Injector
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Joe
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Directly resolving a real 3D spray head's atomisation will be very computationally intensive.

I would make sure the quality of the results generated are worth the effort.

I would also suggest passing this sort of problen onto a more expert user e.g. consultancy to do an intitial feasability study.

Amongst other things, experimental validation would almost certainly be required before you could have any confidence in the results.
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Old   May 30, 2007, 14:42
Default Re: Phase Change Injector
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Gert-Jan
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I agree with Joe that this is very tough to do. Who starts such a project out of the blue?

Gert-Jan
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Old   May 31, 2007, 07:20
Default Re: Phase Change Injector
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Federico Bruni
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I understand that to resolve this problem is not simple, but I would please myself having preliminary results in order to determine volume fraction and turbolence parameters (k-eps/SST), which are fundamental in order to establish combustion stability. Spray shape and atomization are less important because they will be tested in future experiments.
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