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research-article

A synergistic combination of thermal models for optimal temperature distribution of discrete sources through metal foams in a vertical channel

[+] Author and Article Information
Banjara Kotresha

Research scholar, Dept. of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal- 575025, India
bkotresha@gmail.com

Gnanasekaran N

Assistant Professor, Dept. of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal- 575025, India
gnanasekaran@nitk.edu.in

1Corresponding author.

ASME doi:10.1115/1.4041955 History: Received March 15, 2018; Revised November 02, 2018

Abstract

This paper discusses about the numerical prediction of forced convection heat transfer through high porous metal foams with discrete heat sources in a vertical channel. The physical geometry considered for this study consists of a discrete heat source assembly placed at the center of the channel along with high thermal conductivity porous metal foams on either side to enhance the heat transfer. The novelty of the present work is the use of the local thermal equilibrium (LTE) model for the metal foam region and the local thermal non-equilibrium (LTNE) model for the metal region to investigate the temperature distribution of the heat sources and to get the optimal heat distribution so as to achieve an isothermal condition. Aluminum and copper metal foams of 10 PPI having a thickness of 20 mm are considered for the numerical simulations. The metal foam region is considered as homogeneous porous media and numerically modeled using Darcy Extended Forchheimer model. The proposed methodology is validated using the experimental results available in literature. Finally, the results of excess temperature for both empty and metal foam filled vertical channel are presented in this work.

Copyright (c) 2018 by ASME
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