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Water solid jet simulated by DPM particles !!!!

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Old   July 16, 2010, 04:22
Default Water solid jet simulated by DPM particles !!!!
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Hi there!

I've been simulating water jet (diameter of 2 mm) impinging upon flat wall (100centigrades). Firstly, I did it via VOF model and results are OK especially heat fluxes agreed well with measured data.

Now I have switched the same case to DPM approach and I try to solve it with Lagrange particles (droplets). I know that I am breaking fluent limitation on an allowed volume fraction in a cell (10%), But I want to test it anyway.
I have already succesfully modeled a cold flow without heat transfer.
When I tried to simulate heat transfer with WallJet BC, I've got 70times lower values of HTC than I should have got.
Than I tried also switched to Wall Film BC with solving species transport, but here I've got negative values of HTC instead of possitive ones.
I've also written my own DPM-LAW for inert particles, but it has helped only a little.
Any suggestions ???

Thanks in advance!
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