An Official Journal of the American Society of Thermal and Fluids Engineers

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INVERSE IDENTIFICATION OF EFFECTIVE THERMAL CONDUCTIVITY BASED ON SURFACE TEMPERATURE MEASUREMENT: AN ANALYSIS OF EFFECTING FACTORS

ABSTRACT

A new conductivity-based method was presented in one of our previous papers (Fan et al., 2012) which provides a simple and efficient solution to the inverse heat transfer problem on the geometry identification of inner plate surface with defects. However, for this method there are still some problems, such as the error resources and the effecting factors of the method, that need to be discussed. This paper takes the core identification process of the method, i.e., the identification of the distribution of effective thermal conductivity, to analyze the above-mentioned problems. Based on a series of numerical experiments, we can draw the following conclusions (also applicable for the conductivity-based method): the method does not magnify the temperature measurement error; the error in the identification result comes from the inverse problem itself but not the algorithm; increasing the temperature of the heating surface is helpful to obtain a more accurate identification result; the number of temperature measurement points can be reduced, and the lateral boundary conditions have a negligible effect on the identification result of the inverse method.