A three-dimensional inverse forced convection problem in estimating surface heat flux by conjugate gradient method

Cheng Hung Huang, Wei Chung Chen

Research output: Contribution to journalArticlepeer-review

115 Citations (Scopus)

Abstract

A three-dimensional (3D) transient inverse forced convection problem is solved in the present study using the Conjugate Gradient Method (CGM) and the general purpose commercial code CFX4.2-based inverse algorithm to estimate the unknown boundary heat flux in a three-dimensional irregular duct flow problem. The advantage of calling CFX4.2 as a subroutine in the present inverse calculation lies in that many difficult but practical 3D inverse convection problem can be solved under this construction. Results obtained by using the conjugate gradient method to solve this 3D inverse forced convection problems are justified based on the numerical experiments. It is concluded that accurate boundary fluxes can be estimated by the conjugate gradient method except for the inlet surface and final time. The reason and improvement of this singularity are addressed. Finally, the effects of the height of duct, velocity of the inlet fluid and measurement errors on the inverse solutions are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)3171-3181
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume43
Issue number17
DOIs
Publication statusPublished - 2000 Sep 1

All Science Journal Classification (ASJC) codes

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

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