[suktan]

I try to simulate heat transfer of a circular coil conducting DC current. The coil is assumed floating in static air. It is modeled as follows.


1, axisymmetry is employed.
2, no-slip BC is applied to the coil represented by a rectangle
3, heat source is applied to the "coil" rectangle
4, laminar flow, ideal gas


I have the following questions:


1, Is the model okay?

2, Can it be described as "natural convection, external flow problem"?
3, What should I use for the top, bottom and right-hand (RH) side BC? I have the following combinations being considered.


a, RH, top and bottom: norm velocity = 0; all temp = ambient temp
b, RH: norm velocity = 0, top: outlet, bottom: zero pressure inlet; all temp = ambient temp
c, RH, top and bottom: zero pressure; all temp = ambient temp


Which one is correct? Or all are incorrect?


I expect to see flow for hot air rising and cold air falling in the result, air circulation around the coil.


Thank you.