RESEARCH AND COMPUTATIONAL MODELING OF HEAT-REMOVING PROPERTIES OF THE RADIATOR EXTENDED SURFACE
Abstract
In this work the research of heat-removing properties of extended surfaces areas, for example,
finned and needle radiators, for assessment of efficiency of thermal field and heat extraction
distribution is described. Also the description of the carried-out computational modeling is provided
in the Fluent processor of the final and element analysis universal program system Ansys.
The relevance of the selected subject is confirmed by the fact that one of the most important and
difficult tasks arising when developing the electronic equipment is a withdrawal of heat generated
by it. At a current steady trend in reduction of dimensions of electronic devices this problem does
not disappear, and on the contrary, becomes more and more sharp, and that is stronger, than device
high power less its physical volume, and not only the efficiency of heat extraction, but also
dimensions and, of course, reliability of electronic devices operation depends on constructions of
heat-removing elements. Applicable, for example, to the electronic equipment, a source of thermal
power is heatterminated element. In that case when heat conductivity of the environment is applied
to normalization of its thermal mode heat sinks (radiators) insufficiently – heat-removing constructions
from metal with big coefficient of heat conductivity (copper, aluminum) as the heat conductivity
coefficient in metals is higher. In work the conclusion is drawn that for a solution of a
complex problem of efficiency assessment in the heat sink for the purpose of decrease in temperature
of heatterminated element, it is necessary to use an electrothermal analogy.
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