Convection heat transfer from a hybrid circuit
Accurate values of heat transfer coefficient are needed for simulation of the thermal characteristics of a thick film resistor. In this paper, the results of an investigation are presented where an optical technique is used to study the convection plumes from a horizontally positioned hybrid resistor package. The observations have shown that simplifying approximations to the convection coefficients may be made in thermal analysis of such devices. Using these approximations and an optimization technique, values have been estimated for the coefficients.