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

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p,bx;^$B_:z0Inverse estimation for unknown fouling geometry on inner wall of forced-convection pipe水利论文`9XqKR1N~!F!W

(u+a&at,m0s{C0Abstract: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.

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:\m0FO(i xf0Author:水利论文3]#W@EAXbOb;L

;_:VXBJW)KFe0Wen-lih CHEN Yu-ching YANG Haw-long LEE J.L.SALAZAR

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3k d/NZ.QU0Clean Energy Center, Department of Mechanical Engineering, Kun Shan University, Yung-Kang City, Tainan 710-03, Taiwan, China水利论文 H _7Xlc1[twt

9O2s0W Dx0Day,A0期 刊:水利论文g E'n \$]?{;]

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应用数学和力学(英文版)水利论文 Pc0l NQ*lP

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Journal:

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([(Z-n E/x1K Oi&h:GU1}u0APPLIED MATHEMATICS AND MECHANICS水利论文C;g;|g{+qG{'y

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vN5fs)vDQ02011, 32(1)

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分类号:

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:K/tOaya8x+C(F2r8j0Keywords:水利论文X1w(K3j'f1^(Bp

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inverse problem

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9CdAQY;q\1_j;s`0fouling layer水利论文t+Ua~+sXTT

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pipe system水利论文U-Q7c*f2a$br

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conjugate gradient method

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temperature 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

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0Yn!b*Bv:iq$t s0the National Science Council of Taiwan of China水利论文*oXq'z fvi:t8XN

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