Hussein, MS, Lesnic, D, Ivanchov, MI et al. (1 more author) (2016) Multiple time-dependent coefficient identification thermal problems with a free boundary. Applied Numerical Mathematics, 99. 24 - 50. ISSN 0168-9274
Abstract
Multiple time-dependent coefficient identification thermal problems with an unknown free boundary are investigated. The difficulty in solving such inverse and ill-posed free boundary problems is amplified by the fact that several quantities of physical interest (conduction, convection/advection and reaction coefficients) have to be simultaneously identified. The additional measurements which render a unique solution are given by the heat moments of various orders together with a Stefan boundary condition on the unknown moving boundary. Existence and uniqueness theorems are provided. The nonlinear and ill-posed problems are numerically discretised using the finite-difference method and the resulting system of equations is solved numerically using the MATLAB toolbox routine lsqnonlin applied to minimizing the nonlinear Tikhonov regularization functional subject to simple physical bounds on the variables. Numerically obtained results from some typical test examples are presented and discussed in order to illustrate the efficiency of the computational methodology adopted.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 IMACS. Published by Elsevier B.V. This is an author produced version of a paper published in Applied Numerical Mathematics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Inverse problem; Tikhonov regularization; free boundary; heat equation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Sep 2015 11:56 |
Last Modified: | 03 Nov 2016 02:15 |
Published Version: | http://dx.doi.org/10.1016/j.apnum.2015.09.001 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.apnum.2015.09.001 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:89650 |