ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
ADVANCES IN MODELING ENHANCED HEAT TRANSFER SURFACES
要約
Enhanced heat transfer technology has developed to
be a subject of considerable importance in industrial heat
transfer equipment. Enhanced heat transfer surfaces
typically involve specially configured surface geometries,
or external fields, which provide higher heat transfer
coefficients. Because enhanced surfaces typically involve
a significant number of dimensional variables, heat transfer
prediction is much more difficult than, for example flow
in a plain, round tube. Significant advances have been
made in understanding the enhancement mechanism and in
the development of methods to predict the heat transfer
and friction characteristics. The predictive methods range
from correlations needed by the designer to
mechanistically based analytical models and numerical
solutions. Considerable advances have been made in
rationally based models for boiling, condensation, and
single-phase flow. The sophisticated models are able to
predict the effect of geometrical parameters and fluid
properties. Problems involving both laminar and turbulent
flow have been addressed by numerical solution of the
momentum and energy equations has addressed. This
paper reviews the advances that have been made for the
various heat transfer modes and enhancement techniques.
We conclude that the subject of enhanced heat transfer has
moved substantially away from the empirical art that
dominated the subject area 10−20 years ago. With
rationally based understanding, more advanced, enhanced
surface geometries should follow along.