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In VOF model, The bubble growth matter.

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Old   July 15, 2014, 20:48
Default In VOF model, The bubble growth matter.
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JeongGyun Ham
Join Date: Mar 2014
Location: Korea
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In VOF model, I want to simulate boiling bubble growth.

I know that VOF model needs source in each cell for mass transfer bewteen primary(vapor) and secondary phase(liquid).

So I wrote UDF files(mass source in liquid and vapor, and energy source in mixture).

I expressed mass soures, energy source as attached image.

Fluent inputing UDF operate. but primary void fraction is zero.

I carried out this simulation.
1. Inputting mesh.
2. Activitating VOF model, Energy, laminar
3. Inputting material, UDF and assigning UDM
4. Setting boundatys, operating conditions
5. Setting initialization(Temperature : saturated temperature/fraction : 1)
6. Run after setting run calculation.

I don't undersand this matter.

I think it is the initialization matter but I don't be assured of it.

Do you think what is the matter?
Could you please help me?
Attached Images
File Type: jpg Heat transfer with phase change.jpg (93.5 KB, 17 views)
Attached Files
File Type: c boiling.c (2.2 KB, 17 views)
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