How might one apply a UDF at a specified interface?

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Ashish Saxena

Try to convert it into shadow interface and then follow your method.

Yibiao Wang

Dear Ashish Saxena,

I am doing it in your way. The problem now is that how to deal with the mass transfer because there is phase-change occuring at this interface.

Regards,

Bill

Senthil Kumar Parimalanathan

Dear Mr. Wang,

The problem is not quite easy. Refer Banerjee's paper DOI: 10.1080/10407780601149862. You can use his idea to find the interface and couple them to mass transfer macro.

Regards.

Sayan Bose

If you don't mind can I get a look at your UDF.

Dear Mr.Senthil Kumar P,

Thank you for the article. His work is really impressive. The interface in his simulation has to be determined by the mass fraction of vapor, while in my simulation, I have already known the location of the interface, which is the wick/vapor interface. I have written a UDF to help transfer mass from liquid water to vapor region as in the attachment. I need help about the UDF, because I am not sure if it is written in a proper way.

I am really appreciated for your help.

Let me see Your UDF and come back you...

Regards..

me Habibi

Hello all,

i have the same problem as this mentioned by Mr. Wang. I want to have mass transport on a specific interface not in the whole domain of fluid.

Can anyone help me to fix this?

Thanks.

Best regards.

Christos Christou

I have a similar issue. I just need to have evaporation on specific regions inside my cylinder (instead of the whole domain) to reduce simulation speed. How do I define this regions?