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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

NUMERICAL AND EXPERIMENTAL STUDY OF HEAT TRANSFER DURING MELTING INSIDE A HORIZONTAL TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC7.3410
pages 375-380

Résumé

The melting process of a phase change material (PCM) enclosed in a horizontal, isothermal circular tube is studied for various Rayleigh numbers analytically and by experiments.
The mathematical model considered involves heat conduction as well as natural convection as the basic heat transport mechanisms governing this moving boundary problem. The difficulties associated with the time-wise changing melt region, whose shape is also part of the solution, could be removed by applying a numerical mapping technique for the generation of an appropriate curvilinear coordinate system. Numerical solutions have been obtained for Rayleigh numbers in the range 105 ≤ Ra ≤ 106.
Experiments were performed with n-octadecane as PCM. The design of the test cell allows the melting front to be registrated photographically with time. The agreement between experimental and numerical data is reasonably good.