Abstract
An estimation technique of temperature distribution along the heat flow direction in a material was devised. It could contribute to the quick determination of thermal diffusivity. This technique is available to the system of infinite flat plate which is insulated at one surface. The estimation only requires temperature responses at both surfaces.
As a result of the analysis on the basic concept of the estimation technique, it was shown that the estimation error depends mainly on the Fourier number. These relationship was represented quantitatively for easy use. The fourier number gives the applicable conditions of this technique, which was clarified to be effective under arbitrary initial conditions by employing the numerical experiments.
