Investigation Of The Effects Of The Dimension
Of A Localized Heat Source On The
Natural Convection In Square Cavities
Author(s)
B. Calcagni, F. Marsili & M. Paroncini
Abstract
The objective of the present study is to gain some insight into fluid motion and
heat transfer phenomena in the case of a square enclosure heated from below and
symmetrically cooled from the sides; the effects of different dimensions of the
heat source are experimentally investigated.
In this paper we analysed the effect of the variation in the heat source length
on the natural convection inside the square cavity; the length of the heat sources
studied are 1/5, 2/5, 3/5 and 4/5 of the wall.
The temperature distribution is experimentally measured by real-time and
double-exposure holographic interferometry.
Different convection forms were obtained depending on Ra and on the heat
source length.
Graphs with relations between average Nu, Ra and the heat source length are
finally presented.
The Nusselt number was evaluated on the heat source surface and it showed
a symmetrical form raising near the heat source borders.
Keyword: natural convection, square enclosure, localized heat source, real-time
and double exposure holographic interferometry.
1 Introduction
Thermal management is a critical task in the design of electronic systems
especially the natural convection driven system which encompass the majority of
the consumer products. In fact since proper cooling of electronic components by
natural or mixed convection is a reliable operation, the study of heat transfer in
these configurations must be examined in detail in order to provide adequate
Keywords
natural convection, square enclosure, localized heat source, real-time
and double exposure holographic interferometry.
Related Book
Other papers in this volume
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