[sakil2k3]

Hello every one. I m facing some problem. Hope you will advice me to solve it:
Problem: I want to simulate phase change due to solar radiation.
Left is a photovolatic cell in which an inward heat flux is applied.Just after the Cell, there is air. After the air layer there is a alluminium cover. The PCM(Phase change materials) is after the cover.
Now, the condition is
1) Heat flux is applied to the PV cell. So its temperature will rise(750 W/m2).
2) there will be an Energy loss due to convection and radiation to
ambient (assume convective heat transfer cof: 10w/m2k).
3) The rest heat flux is imposed in the cover make it heated. As a result the PCM will melt.
Question: I have defined the interfaces and coupled it for PV to Air, Air to cover, Cover to PCM. I can easily give heat flux in the left PV cell. But as the walls are coupled how can i define heat transfer co efficient for the air??

I used P1 radiation model along with solidification and melting.

PLs any one can help me?????

[sakil2k3]

Can anyone help me??

[sakil2k3]

no one for help????