Estimation of local nucleate boiling heat flux using a three-dimensional transient heat conduction model
DOI: 10.1080/17415971003587768
Title: Estimation of local nucleate boiling heat flux using a three-dimensional transient heat conduction model
Journal Title: Inverse Problems in Science and Engineering
Volume: Volume 18
Issue: Issue 2
Publication Date: March 2010
Start Page: 279
End Page: 294
Published online: 26 Feb 2010
ISSN: 1741-5977
Author: Yi Henga, Adel Mhamdia, Enno Wagnerb, Peter Stephanb & Wolfgang Marquardta*
Affiliations:
a AVT-Process Systems Engineering , RWTH Aachen University , Turmstr. 46, D-52064 Aachen, Germany
b Chair of Technical Thermodynamics , Darmstadt University of Technology , Petersenstr. 30, D-64287 Darmstadt, Germany
Abstract: Boiling heat transfer is still hard to model and to predict. Among all kinds of studies on boiling processes, the Estimation of the local heat fluxes at the boiling surface is fundamental. In this article, we solve a three-dimensional transient inverse heat conduction problem (IHCP) arising from a single-bubble nucleate boiling experiment to reconstruct the local boiling heat flux from a high-resolution temperature field measured at the back side of a thin heating foil. From the mathematical point of view, this problem belongs to the class of ill-posed inverse problems and cannot be solved straightforwardly by classical numerical methods. Thus, an iterative regularization strategy based on the conjugate gradient method is applied to the solution of the considered IHCP. Ring-shaped local boiling heat fluxes which undergo a significant change during a single-bubble cycle are observed.
Accepted: 17 Aug 2009

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