| Popis: |
Many applications in therma wave physics involve calculating the periodic temperature distribution T(r,t), everywhere for a source of known geometry. For calculations involving more than one medium, such as a gas and a solid, or a layered structure, we assume particular boundary conditions for the continuity of temperature and the heat flux, which affect the final temperature distribution. KUO et al. [1] have calculated the periodic temperature distribution assuming a point heat source for a homogeneous, isotropic solid, when the thermal diffusivity of the solid is greater than, equal to, and less than that of the gas, predicting the distortion of the temperature profile near the gas-solid interface. We present a direct experimental measurement of the temperature profile in an insulating solid, which demonstrates the effect of the mismatch in thermal properties at the interface and provides a picture of the temperature distribution in the solid near the interface. We describe the experimental parameters, present our results, and briefly compare our results with the theoretical picture of [1]. |
