An inverse geometry problem in identifying irregular boundary configurations

Cheng Hung Huang, Bor Herng Chao

Research output: Contribution to journalArticlepeer-review

127 Citations (Scopus)

Abstract

An inverse geometry heat conduction problem (shape identification problem) is solved to detect the unknown irregular boundary shape by using the boundary element method (BEM)-based inverse algorithms. They are the Levenberg-Marquardt method (L-MM) and the conjugate gradient method (CGM), respectively. A sequence of forward steady-state heat conduction problems is solved in an effort to update the boundary geometry by minimizing a residual measuring the difference between actual and computed temperatures at the sensor's locations under the present two algorithms. Results obtained by using both schemes to solve the inverse problems are compared based on the numerical experiments. One concludes that the conjugate gradient method is better than the Levenberg-Marquardt method since the former one: (i) needs very short computer time; (ii) does not require a very accurate initial guess of the boundary shape; and (iii) needs less number of sensors. Finally the effects of the measurement errors to the inverse solutions are discussed.

Original languageEnglish
Pages (from-to)2045-2053
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume40
Issue number9
DOIs
Publication statusPublished - 1997 Jun

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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