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contributor authorCha’o-Kuang Chen
contributor authorLi-Wen Wu
contributor authorYue-Tzu Yang
date accessioned2017-05-09T00:29:05Z
date available2017-05-09T00:29:05Z
date copyrightMay, 2008
date issued2008
identifier issn0022-1481
identifier otherJHTRAO-27836#051702_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/138555
description abstractThis paper investigates the inverse heat transfer problem of laminar forced convection within a circular pipe. The performances of two classical algorithms used in the whole domain function specification method (WDFSM) to obtain simultaneous estimates of the time-varying inlet temperature and outer-wall heat flux are compared. Additionally, this study proposes a modification to the linear assumption employed in the conventional WDFSM to improve its estimation performance. The WDFSM solution procedure is based on future temperature measurements at two different locations within the pipe flow. In the modified algorithm, the variations of the estimations at all time steps for various values of the future-time parameter are investigated, and if large variations in the slope of the function are detected at some time steps, the originally linear assumption for the variation of the unknowns is replaced with the assumption of a constant function at these time steps. Otherwise, the estimates at the other time steps are calculated using the linear assumption. The numerical results confirm that the proposed algorithm yields slightly more accurate estimates of the unknowns than the two classic algorithms.
publisherThe American Society of Mechanical Engineers (ASME)
titleProposed Modification to Whole Domain Function Specification Method to Improve Accuracy of Its Estimations
typeJournal Paper
journal volume130
journal issue5
journal titleJournal of Heat Transfer
identifier doi10.1115/1.2884184
journal fristpage51702
identifier eissn1528-8943
keywordsExterior walls
keywordsAlgorithms
keywordsPipes
keywordsApproximation
keywordsTemperature
keywordsHeat flux
keywordsEquations
keywordsErrors
keywordsBoundary-value problems
keywordsFluids AND Heat transfer
treeJournal of Heat Transfer:;2008:;volume( 130 ):;issue: 005
contenttypeFulltext


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