MODIFIED CONDUCTION SHAPE FACTORS FOR ISOTHERMAL BODIES EMBEDDED IN A SEMI-INFINITE MEDIUM

MODIFIED CONDUCTION SHAPE FACTORS FOR ISOTHERMAL BODIES EMBEDDED IN A SEMI-INFINITE MEDIUM

Numerical finite-element method calculations were performed for isothermal surfaces embedded in a semi-infinite medium with convection boundary conditions. A modified shape factor was defined that combines the conduction heat transfer in the medium and the convection to the environment, with the geo...

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Veröffentlicht in:Numerical heat transfer. Part A, Applications Applications, 1993-03, Vol.23 (2), p.233-245
Hauptverfasser: Anteby, I, Shai, I.
Format: Artikel
Sprache:eng
Schlagworte:
420400 - Engineering- Heat Transfer & Fluid Flow
Boundary layers
CALCULATION METHODS
CONVECTION
Correlation methods
CYLINDERS
Cylinders (shapes)
ENERGY TRANSFER
ENGINEERING
Exact sciences and technology
FINITE ELEMENT METHOD
Fundamental areas of phenomenology (including applications)
Geometry
Graphic methods
Heat conduction
Heat convection
HEAT TRANSFER
MASS TRANSFER
Mathematical models
NATURAL CONVECTION
NUMERICAL SOLUTION
Physics
SHAPE
SPHERES
Surfaces
Temperature
THERMAL CONDUCTION
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Zusammenfassung:Numerical finite-element method calculations were performed for isothermal surfaces embedded in a semi-infinite medium with convection boundary conditions. A modified shape factor was defined that combines the conduction heat transfer in the medium and the convection to the environment, with the geometrical characteristics of the problem. Infinite finite elements are used; these form the last layer of elements in the infinite directions. The modified shape factors for a sphere and for a long horizontal cylinder are presented in graphs and correlations, both using nondimensional parameters. The heat flux distribution on the surface of the body and the temperature and heat transfer on the surface of the medium are also presented.
ISSN:1040-7782
1521-0634
DOI:10.1080/10407789308913670