Author(s): A. Jamal, M. A. I. El-Shaarawi & E. M. A. Mokheimer
The effect of thermal boundary conditions on conjugate laminar natural
convection heat transfer in vertical eccentric annuli is numerically investigated
using the finite-difference technique.
Numerical results are presented for a
Newtonian fluid of Prandtl number 0.7 in an eccentric annulus.
The variation of
induced flow rate and total heat absorbed in the annulus are studied for two sets
of boundary conditions at different values of geometry parameters
(dimensionless annulus eccentricity and radius ratio).
In both sets of boundary
conditions, one wall is heated isothermally.
The other wall is kept at the inlet
fluid temperature for the first set of boundary conditions and adiabatic for the
The effect of interchanging the wall thermal conditions for each set is
Analysis reveals that heating the outer cylinder wall or keeping
one of the annulus walls insulated is more useful for inducing flow (thermosiphons).
natural convection, heat transfer, eccentric annuli, thermal
boundary conditions, finite difference method, Newtonian fluid.
The study of steady laminar induced flow in vertical eccentric annuli with
conjugate heat transfer is of great importance because of its many engineering
applications in electrical, nuclear, solar and thermal storage fields.
Size: 444 kb
Paper DOI: 10.2495/CMEM070451
the Full Article
This article is part of the WIT OpenView scheme and you can download the full text Adobe PDF article for FREE by clicking the 'Openview' icon below.
this page to a colleague.