Conductivity-Based Scheme for Identification of an Inner Pipe Boundary from Temperature Measurements

摘要

CORROSION, as is known to us all, is the key reason for thewallnthinning of pipe; therefore, the timely quantitativenidentification of a pipe’s inner-surface condition is of greatnimportance [1]. In most developed methods (such as the steepest-ndescent method [2], the Levenberg–Marquardt method [3], and thenconjugate gradient method [3,4]), the boundary shape must benupdated during the iteration process until the convergence of thencalculated and the measured temperature distributions of theninspection surface. That is to say, the remeshing of grid for the newnirregular-shaped calculation domain is needed for each iteration,nwhich may greatly increase the complexity of the algorithm and alsonthe time used for the solution of the inverse problem.