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« on: February 29, 2012, 02:13:51 AM »
Hi, all
I want to simulate a formation of frost at cold plate.
It must be divided two sub-domain: frost domain and air domain(water-vapor).
absolutely, frost thickness is increasing, so does not separate physically(meaning that does not separate geometrically)
Therefore, I use VOF model or species transport equation.
if I use VOF model, for example, VOF= 1 is air and VOF = 0 is fully ice, mean value is frost.
similarly, if i use species transport equation, mass fraction =1 is air.
however, some problems.
If I use species transport equation, the transferred region of temperature is increasing.
i use volume-weighted density. i think this is a cause.
So, i use ideal-gas density, it's fine. does not increase temperature but mixture density is not proper value
for example, species1 = 100, species2 =1000, mixture density is between 100 and 1000, i think.
but, after simulation, density is below 100.
this is my e-mail address: ssamton@hanyang.ac.kr
please tell me your idea.
Bests Mr. Kim