cpfmarvin
Mechanical
- Jun 14, 1999
- 5
I am developing a few simple thermal models to evaluate some specific steady-state characteristics; I am using a linear FEA program.<br>
<br>
When setting the boundary conditions, I would like to include the free convection coefficients at appropriate edges. If I do not include convention, the outer boundaries will act as insulated surfaces, which may be fine for material comparisons, etc.<br>
<br>
Most of the models are analyzed in ambient air. To determine the convection coefficient (h), I have been using closed-book forms for various geometry and calculating the Rayleigh’s number, Nusselt’s number, etc. for each different surface. Calculating (h) for each side can be cumbersome.<br>
<br>
I would be interested in learning of any techniques used by experienced modelers. Thanks. <br>
<br>
When setting the boundary conditions, I would like to include the free convection coefficients at appropriate edges. If I do not include convention, the outer boundaries will act as insulated surfaces, which may be fine for material comparisons, etc.<br>
<br>
Most of the models are analyzed in ambient air. To determine the convection coefficient (h), I have been using closed-book forms for various geometry and calculating the Rayleigh’s number, Nusselt’s number, etc. for each different surface. Calculating (h) for each side can be cumbersome.<br>
<br>
I would be interested in learning of any techniques used by experienced modelers. Thanks. <br>
