The boundary-element method for the determination of a heat source dependent on one variable Article First Online: 03 January 2006 Received: 21 December 2004 Accepted: 20 October 2005 DOI :
10.1007/s10665-005-9023-0

Cite this article as: Farcas, A. & Lesnic, D. J Eng Math (2006) 54: 375. doi:10.1007/s10665-005-9023-0
Abstract This paper investigates the inverse problem of determining a heat source in the parabolic heat equation using the usual conditions of the direct problem and a supplementary condition, called an overdetermination. In this problem, if the heat source is taken to be space-dependent only, then the overdetermination is the temperature measurement at a given single instant, whilst if the heat source is time-dependent only, then the overdetermination is the transient temperature measurement recorded by a single thermocouple installed in the interior of the heat conductor. These measurements ensure that the inverse problem has a unique solution, but this solution is unstable, hence the problem is ill-posed. This instability is overcome using the Tikhonov regularization method with the discrepancy principle or the L -curve criterion for the choice of the regularization parameter. The boundary-element method (BEM) is developed for solving numerically the inverse problem and numerical results for some benchmark test examples are obtained and discussed

Keywords boundary-element method heat source inverse problems parabolic equation

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