[vidyadhar]

Hello,


I want to determine heat and mass transfer rates from curved liquid-vapor interfaces. The sizes of the domain are at microscale. I want to apply Hertz-Knudsen-Schrage theory of evaporation at the interface.
By applying so, I want to determine the heat and mass transfers to cool a hot substrate by means of thin-film evaporation.


My question is:
1) Is there an existing solver in OpenFoam that models the above phenomena.
2) Whether such a solver considers temperature jumps at the interface? (i.e., the interface temperature is an unknown and not equal to either of liquid or vapor, and has to be determined from the solution)
3) Are there any proven validated results with those solvers.


Thanks in advance!
vidyadhar

[MiladBagheri]

Hey, I am working on a similar topic.
Well there exist two approaches, VOF & Liquid Thin Film Model.
Hertz-Knudsen-Schrage is already implemented in icoReactingMultiphaseInterFoam solver. This is VOF method.

The best Liquid Thin Film Model solver for your case is reactingParcelFoam solver.

icoReactingMultiphaseInterFoam does not calculate mass transfer rate but it gives volume fraction so you will be able to calculate the mass transfer rate by yourself.

reactingParcelFoam calculates ‘mass phase change’ and ‘vapourisation rate’.

If you have a curved interface the best solver will be reactingParcelFoam cause wetting is computationally expensive using VOF.

Temperature jump can be seen clearly using both methods with proper boundary conditions.

For curved geometries I did not see any validated results.

The solver reactingParcelFoam previously was named reactingParcelFilmFoam, you may find the following useful.

http://www.tfd.chalmers.se/~hani/kur...oam_report.pdf

[vidyadhar]

Thank you Milad for the information. I really appreciate your suggestions.
I will go through them.


Regards,
vidyadhar