Inverse estimation for unknown fouling geometry on inner wall of forced-convecti

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Abstract:A conjugate gradient method (CGM) based on the inverse algorithm is used to estimate the unknown fouling-layer profile on the inner wall of a pipe system using simulated temperature measurements taken within the pipe wall. It is assumed that no prior information is available about the functional form of the unknown profile.Therefore, the procedure is classified as the function estimation in inverse calculation. The temperature data obtained from the direct problem are used to simulate the temperature measurements. The accuracy of the inverse analysis is examined using the simulated exact and inexact temperature measurements. The results show that the excellent estimation of the fouling-layer profile can be obtained for the test case considered in this study.The technique presented in this study can be used in a warning system to call for pipe maintenance when the thickness of fouling exceeds a predefined criterion.水利论文VXl$Xg5w

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Wen-lih CHEN Yu-ching YANG Haw-long LEE J.L.SALAZAR

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F*o{kG g%i$G$V3Cp0Clean Energy Center, Department of Mechanical Engineering, Kun Shan University, Yung-Kang City, Tainan 710-03, Taiwan, China

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K+pI8gQQED1?1z0应用数学和力学(英文版)水利论文s A!C)U tv'S4E(\*wC H

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Journal:水利论文e&J.o},}:a*J

V!y%w.^W/@|g3FC0APPLIED MATHEMATICS AND MECHANICS

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2011, 32(1)水利论文lA4EJTF

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6M`}9q#]0inverse problem

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fouling layer水利论文a(Pc5Qkl)dq

cN0lo]p(Gt0pipe system水利论文1_)[0`7~$T

Gly2si)Ga b9X0conjugate gradient method

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"gC@e{!{0temperature measurements conjugate gradient method profile function estimation prior information inverse algorithm temperature data inverse analysis warning system pipe system maintenance study test case used in results form of exact based call水利论文!DKf~ E

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基金项目:水利论文AvN"B"}VZL7aj

7B?.Jb_:F0the National Science Council of Taiwan of China

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