Enhancement Of Conjugate Heat Transfer From
Electronic Chips With A Rotating
Tri-vane Assembly
Author(s)
R. I. Bourisli
Abstract
The enhancement of heat transfer from heat-dissipating devices is investigated.
The laminar convection-conduction heat transfer from five heat-generating block
in a channel at different Reynolds numbers is numerically simulated using the
finite volume method. Newly proposed tri-vane structures with constant angular
velocities are placed near the upper downstream corners of the blocks. The vanes
in the structures drive significant portions of the core channel flow into the dead
zones between the blocks. An optimum angular velocity for the structure is shown
to exist, giving a reduction in maximum temperature of 16.3% at Re = 1000. The
location of the optimum angular velocity was shown to bifurcate because of the
influence of the natural frequency of the structure. It is concluded that this effect
can have a positive effect on the overall heat transfer from the blocks.
Keywords: Heat transfer enhancement, corrugated channel, heated blocks,
rotating vanes, optimum angular velocity.
1 Introduction
The problem of enhancing heat transfer in channels with geometrical
inhomogeneities is of great interest to engineers from both the theoretical and
practical points of view. Flow in a channel with heat-dissipating elements, for
example, is found in many engineering devices such as compact heat exchangers,
oxygenators, dialyzers, nuclear reactor cores, and cooling systems of electronic
equipment. In most of these applications the design requires that the maximum
temperature of the heat-dissipating components be maintained below a certain
temperature in order increase device efficiency and reliability and avoid failure [1].
Keywords
Heat transfer enhancement, corrugated channel, heated blocks,
rotating vanes, optimum angular velocity
Related Book
Other papers in this volume
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