COMPUTATION OF CONJUGATE THREE-DIMENSIONAL NATURAL CONVECTION HEAT TRANSFER FROM A TRANSVERSELY FINNED HORIZONTAL CYLINDER

A vectorized finite-difference code has been developed for the Cray-2 supercomputer which has the capability of simulating a wide class of three-dimensional coupled conduction-convection flows. This program numerically solves the transient form of the Navier-Stokes equations of motion for laminar fl...

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Bibliographic Details
Published in:Numerical heat transfer 1989, Vol.16 (1), p.1-13
Main Authors: Tolpadi, A. K., Kuehn, T. H.
Format: Article
Language:English
Subjects:
220100 - Nuclear Reactor Technology- Theory & Calculation
220200 - Nuclear Reactor Technology- Components & Accessories
420400 - Engineering- Heat Transfer & Fluid Flow
990210 - Supercomputers- (1987-1989)
COMPUTER CALCULATIONS
COMPUTER CODES
COMPUTERS
CONVECTION
CRAY COMPUTERS
CYLINDERS
DESIGN
DIFFERENTIAL EQUATIONS
DIMENSIONS
ENERGY TRANSFER
ENGINEERING
EQUATIONS
Exact sciences and technology
FINITE DIFFERENCE METHOD
FINS
Fluid dynamics
FLUID FLOW
Fundamental areas of phenomenology (including applications)
GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
GENERAL STUDIES OF NUCLEAR REACTORS
HEAT TRANSFER
ITERATIVE METHODS
LAMINAR FLOW
MASS TRANSFER
NATURAL CONVECTION
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
Physics
REACTOR COMPONENTS
THICKNESS
THREE-DIMENSIONAL CALCULATIONS
Turbulent flows, convection, and heat transfer
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Summary:A vectorized finite-difference code has been developed for the Cray-2 supercomputer which has the capability of simulating a wide class of three-dimensional coupled conduction-convection flows. This program numerically solves the transient form of the Navier-Stokes equations of motion for laminar flow using the vorticity-vector potential method. One problem that has been considered is three-dimensional natural convection from a heated horizontal cylinder with an attached circular conducting fin array. Numerical solutions have been obtained for a Rayleigh number of 10 6 andaPrandtl number of 5. A parametric study has been performed by varying the fin length, fin spacing, fin thickness, and the fin conductivity parameter. Plots showing the local surface heal flux distribution, temperature distributions, and flow fields were developed using color graphics packages available on the Cray-2 that revealed the existence of very complex fin-cylinder interactions. The local heat flux in the upper section of the fins is predicted to reverse direction under certain operating conditions. The integrated results indicated that for a particular fin material and thickness, an optimum fin spacing and length exist for which the total heat transfer per unit cylinder length is a maximum.
ISSN:1040-7782
0149-5720
1521-0634
2331-4168
DOI:10.1080/10407788908944703