Investigation on the effect of metal foam properties on the PCM melting performance subjected to various heat fluxes

Document Type : Research Paper

Authors

1 Professor, Department of Mechanical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 PhD candidate, Department of Mechanical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz,

3 Professor, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States

Abstract

The purpose of this paper is to analyze the effects of structural and mechanical characteristics of metal foam on the melting behavior of phase change materials under the influence of different heat fluxes. To this aim, a two dimensional numerical model considering the non-equilibrium thermal factor, non-Darcy effect and local natural convection was used. The governing equations of PCM and metal foam are discretized using a finite volume method with a collocated grid arrangement. To simulate the melting of PCM, the enthalpy-porosity method is applied which computes the liquid fraction at each iteration, based on the enthalpy balance. The effect of metal foam characteristics (porosity, pores size and base material) and wall heat flux on the PCM melting time were investigated. The result showed that for both wall heat fluxes (4000 W m-2 and 8000 W m-2), foam structure and its mechanical properties have significant influence on the PCM melting time which these effects should be considered.

Keywords

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Volume 52, Issue 2
June 2021
Pages 320-331
  • Receive Date: 11 January 2019
  • Revise Date: 11 March 2019
  • Accept Date: 30 March 2019
  • First Publish Date: 16 February 2021