Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Estimation of Spatial Varying Thermal Contact Conductance in Dual Layer Pipes Using the Reciprocity Functional Approach
Submission Author:
Carlos Eduardo Polatschek Kopperschmidt , ES , Brazil
Co-Authors:
Carlos Eduardo Polatschek Kopperschmidt, Bruno Henrique Marques Margotto, Marcelo Colaco, Wellington Betencurte da Silva
Presenter: Carlos Eduardo Polatschek Kopperschmidt
doi://10.26678/ABCM.COBEM2023.COB2023-2368
Abstract
Thermal contact conductance (TCC) plays a critical role in various engineering applications involving heat transfer between solid surfaces. The proper knowledge of TCC is required in many engineering applications, such as electronic packaging, nuclear reactors, aerospace, and biomedicine applications, among others, where some careful evaluation of TCC allows a more accurate analysis of the correspondent thermal system, leading to improved efficiency, reduced energy consumption, and prevention of thermal damage. In addition, the TCC estimation allows a qualitative assessment regarding the presence of discontinuities or failures within the material. The Reciprocity Functional Method (RFM), coupled with the Classical Integral Transform Technique (CITT), has been used as a promising tool for TCC estimation, as it allows the solution of inverse boundary value problems with a low computational cost, not requiring iterative methods nor intrusive measurements, playing as nondestructive testing to investigate interfacial flaws between solid materials. The technique defines two auxiliary problems: one for the temperature discontinuity and the other for the interfacial heat flux, both on the inaccessible interface between the composite materials. In this work, the RFM and the CITT were used to estimate different types of TCCs, considering a three-dimensional double-layer hollow cylinder geometry, which could represent, for instance, double-layer pipelines found in the oil industry. Temperature measurements for the inverse problem were considered available on the outer surface of the pipe, obtained through a finite difference solver, and the results showed high performance in different cases, even using higher noise levels in the measurements.
Keywords
Reciprocity Functional, inverse heat conduction problem, Thermal contact conductance, Classical Integral Transform
