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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Efficient Coupling Procedures in Steady and Unsteady Thermal Analysis

Get access (open in a dialog) DOI: 10.1615/IHTC15.cnd.008973
pages 1399-1410

Abstract

The development of efficient procedures to simulate fluid flow coupled to heat transfer in solids is nowadays essential. The aim of this paper is to show that the unsteady thermal coupled methodology is to be contrasted with that occurring in a steady analysis and to provide an optimal coupling coefficient in each case. This paper analyses the numerical stability at the fluid-solid interface for a thermally coupled model in a steady and then in an unsteady problem. The numerical method is based on a normal mode stability analysis. The most useful and fundamental results are first presented for a steady problem and a fundamental transition is emphasized. An optimal coupling coefficient is presented and its analytical expression is provided. We then extend these results to the unsteady problem in which the transient temperature field is sought and a new approach is proposed. The procedures presented in this paper are based on local coupling coefficients that exploit to advantage the dynamics of the transient medium.