Radiation and convection in circular pipe with uniform wall heat flux

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Journal of Thermophysics and Heat Transfer; (United States)

DOI:https://doi.org/10.2514/3.293· OSTI ID:5819984

Lin, J D; Huang, J M ^[1]

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1. National Chiao Tung University, Hsinchu (Republic of China)

The interaction of thermal radiation with laminar forced convection in thermally developing circular pipe flow is analyzed theoretically. The analysis considers an absorbing and emitting gray fluid bounded by a heated black wall having a uniform heat flux subjected at a certain finite length of wall and insulated otherwise. The contribution of thermal radiation is obtained by solving the two-dimensional exact integral equations for the divergence of radiative heat flux with the use of finite element node approximation technique. The governing energy equation is solved numerically by the Crank-Nicolson finite difference method with an iterative procedure. Effects of various radiation and convection parameters such as optical radius. Peclet number, and inlet fluid temperature on wall radiative heat flux are presented. The effects of the parameters on the development of fluid bulk temperature and wall temperature are also analyzed. 37 refs.

• OSTI ID: 5819984
• Journal Information: Journal of Thermophysics and Heat Transfer; (United States), Journal Name: Journal of Thermophysics and Heat Transfer; (United States) Vol. 5; ISSN 0887-8722; ISSN JTHTE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CONVECTION
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
EQUATIONS
FINITE DIFFERENCE METHOD
FINITE ELEMENT METHOD
FLUID FLOW
FORCED CONVECTION
HEAT FLUX
HEAT TRANSFER
INTEGRAL EQUATIONS
INTERACTIONS
ITERATIVE METHODS
LAMINAR FLOW
MASS TRANSFER
NUMERICAL SOLUTION
PIPES
RADIANT HEAT TRANSFER
RADIATIONS
THERMAL RADIATION
TWO-DIMENSIONAL CALCULATIONS