Modeling of interfacial temperature effects due to an impulsive line heat source

Temperature fields generated by an instantaneous line heat source in the medium consisting of two half spaces of different thermal properties are modeled. The analytical calculations employ the Green functions for an impulsive line source derived previously using the Cagniard–de Hoop technique. The analytical model predicts the change of sign of the reflected temperature field along the interface for a certain range of parameters. It has also been found that for the heat source located in the less conductive medium the temperature peak arrival can occur before the peak from the source temperature field. The analytical results are found to be in excellent agreement with numerical modeling using the finite difference method.