Determination of Thermal Properties. Applications of Regularized Output Least211 Squares Method

摘要

This work presents a systematic methodology to treat identification of211u001etemperature dependent thermal properties from test results. This method is known 211u001eas the Regularized Output Lease Squares Method (ROLS). Applications of the method 211u001eto identification of thermal properties in different cases are presented. For 211u001eeach problem, the direct problem is formulated as a system of one or several 211u001eordinary differential equations which are semi-discretized via the variational 211u001eform of the general heat conduction problem. The solution of the direct problem 211u001eis obtained by time-integrating the semi-discrete equations by means of numerical 211u001equadrature. Both mesh coarsing and Tikhonov-regularization have been adapted in 211u001eorder to achieve a stabilized solution. The available a priori known physical 211u001econstraints on the parameters are taken into account in the minimization.