Use of a vibrating plate to enhance natural convection cooling of a discrete heat source in a vertical channel

Document Type

Article

Publication Date

9-1-2007

Abstract

A numerical investigation was conducted into an alternative method of natural convection enhancement by the transverse oscillations of a thin short plate, strategically positioned in close proximity to a rectangular heat source. The heat source is attached to a mounting board in a vertical channel. Two-dimensional laminar flow finite element studies were carried out with the oscillation parameters, the oscillating plate-heat source mean clearance spacing, and the oscillating plate position varied. Significant cooling was found for displacement amplitudes of at least one-third of the mean clearance together with frequencies (Re / sqrt(Gr)) of over 2π with the displacement being more critical to the cooling level. For the parameters investigated, up to a 52% increase in the local heat transfer coefficient relative to standard natural convection was obtained. The results indicate that this method can serve as a feasible, simpler, more energy and space efficient alternative to common methods of cooling for low power dissipating devices operating at conditions just beyond the reach of pure natural convection. © 2007 Elsevier Ltd. All rights reserved.

Identifier

34248557870 (Scopus)

Publication Title

Applied Thermal Engineering

External Full Text Location

https://doi.org/10.1016/j.applthermaleng.2007.01.023

ISSN

13594311

First Page

2276

Last Page

2293

Issue

13

Volume

27

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