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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

MIXED-CONVECTION HEAT TRANSFER AROUND AN ISOTHERMAL FLAT SURFACE OF FINITE LENGTH

Get access (open in a dialog) DOI: 10.1615/IHTC6.2970
pages 7-12

Abstract

When increasing the effect of natural convection in a mixed convective field, changes in flow pattern cannot be ignored in the region far from a flat surface. The present paper deals theoretically with the thermo-fluid behaviors of laminar mixed convection not only near a vertical flat surface of finite length but also in an extensive region around the surface. Investigation are made of the cases of both aiding and opposing flows with steady two-dimensional mixed convection, and restricted to those of rather small Gr and Re. The properties of fluid were assumed by the Boussinesq approximation. In consideration of the velocity, pressure, and temperature in the infinite region far from the surface, the boundary conditions were determined carefully and the basic equations were solved numerically by the S.O.R. method. As results, it is found out that the flow pattern in a mixed convective field can be classified from the point of view of natural vortex as follows;
for 2.7 ≤ Cr/Re2 : natural vortex flow pattern,
for −2.7 ≤ Cr/Re2 ≤ 2.7 : parallel flow pattern,
for Cr/Re2 ≤ − 2.7 : flow pattern having natural vortex attaching to the surface,
and the temperature distribution not only near but also far from the plate are affected by the natural vortex.