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Hybrid Methods in Engineering

ISSN 印刷: 1099-2391
ISSN オンライン: 2641-7359

Archives: Volume 1, 1999 to Volume 4, 2002

Hybrid Methods in Engineering

DOI: 10.1615/HybMethEng.v2.i2.80
15 pages

SOLUTION FOR THERMAL ENTRY REGION IN LAMINAR FLOW OF BINGHAM PLASTICS WITHIN ANNULAR DUCTS VIA INTEGRAL TRANSFORMATION

U. C. S. Nascimento
Chemical Engineering Department, Universidade Federaldo Para-UFPA, Campus Univenitario do Guama, Rua Augusta Correa, 01, 66075-900—Belem, PA, Brazil
Joao N. N. Quaresma
School of Chemical Engineering, Universidade Federal do Para, FEQ/UFPA, Campus Universitario do Guama, 66075-110, Belem, PA, Brazil
Emanuel N. Macedo
Mechanical Engineering Department, Chemical Engineering Department, Universidade Federal do Para-UFPA, Campus Universitario do Guama, RuaAugusto Correa, 01, 66075-900 -Belem, PA, Brazil

要約

The thermal entry region in laminar flow of Bingham plastics within concentric annular ducts is solved analytically through the classical integral transform technique. Boundary conditions of the first kind are prescribed either at the inner or outer wall duct in order to verity the effects on the temperature field in the fluid. Nusselt numbers axe calculated along both the thermal entry and fully developed regions with high accuracy for different yield numbers and aspect ratios, which are systematically tabulated and graphically presented.


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