Table of Contents
ISRN Mechanical Engineering
Volume 2013, Article ID 194908, 10 pages
http://dx.doi.org/10.1155/2013/194908
Research Article

3D Heat Transfer Analysis of a Miniature Copper-Water Vapor Chamber with Wicked Pillars Array

1College of Physics, University of Chinese Academy of Sciences, 19A Yuquanlu Road, Shijingshan District, Beijing 100049, China
2Department of Mechanical Engineering, University of Turabo, Gurabo, PR 00778, USA
3Department of Mechanical Engineering, National Institute of Technology, Calicut, Kerala 673 601, India
4Laboratory of Advanced Thermal Management Technologies, College of Physics, University of Chinese Academy of Sciences, 19A Yuquanlu Road, Shijingshan District, Beijing 100049, China

Received 24 January 2013; Accepted 11 February 2013

Academic Editors: S. W. Chang, P. Dineva, K. Ismail, G. Juncu, and P. Reis

Copyright © 2013 Yong Jiang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A three-dimensional analysis of the heat and mass transfer phenomena inside a vapor chamber is essential for correctly understanding its thermal performance limitations and structural optimization. This paper presents a complete three-dimensional numerical analysis and comparative study of two different miniature vapor chambers designs with identical external geometry and dimensions but different internal structures: one having a wicked pillar array and the other one without the wicked pillars array. The distribution of the wicked pillar array in the vapor core was aligned. Detailed comparative experimental results are also reported, which were performed to verify the calculations from the numerical simulations. It was found that the numerical and experimental results agree quite well, especially at high heat flux values. It is also observed that the vapor chamber with wicked pillars had a better thermal performance than the conventional design, with a 5% decrease in terms of total thermal resistance due to the added extra channels that allow a better flow of the working fluid to the evaporator surface. An insight into how improving the thermal performance of a vapor chamber is provided through the detailed three-dimensional numerical simulations.