Learning Forum

[atul.srivastava216]

Hello, I am trying to understand how a moving film warms up as it traverses through a furnace filled with hot air. The thickness of the film is about a 50 microns and it moves with a constant velocity of 3 m/s. Since shell conduction cannot be used for a moving wall. My question is how can we study heat conduction inside this moving film. Is it advisable to use the concept of sliding mesh? If yes, the mesh interface should be at the fluid-solid interface, right ? How do I decouple the fluid-solid contact wall and it's shadow. ? Also, Is there another way which is not so computationally demanding as the film is pretty thin. Looking forward to any suggestions. 

[Rob]

If the film is 0.05mm thich how much conduction do you expect relative to the local fluid temperature and speed of motion? 

[atul.srivastava216]

Hello Rob. Thanks for the reply. I do not know if I understand your question properly. But when I did an order of magnitude calculation, the time scale for conduction in thickness direction was about 0.06 seconds. The film is made up of PET.

[Rob]

I'm not too worried about conduction in the thickness, it's along the belt that's effected by shell conduction. 

[atul.srivastava216]

Thanks. The time scale for conduction in length direction is of the order of few years.

[Rob]

So, why do you need shell conduction?