Spatial Effects
QUESTION: When can we neglect the temperature variation inside a solid? We can do that if the heat transfer inside the solid is much more effective than that occurs between the solid and the ambient fluid. If can be demonstrated as the following:
- Heat transfer from the fluid to the solid through convection: q=hA(TS-T?) and the thermal resistance of this process is Rconv=1/(hA).
- Heat transfer from the exterior of the solid to the interior of the solid is through the conductive heat transfer: