Radiative and convective transfer in a cylindrical enclosure for a real gas

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:6559197

Smith, T F; Shen, Z F

A study was initiated to develop a model to describe the transport processes in energy generation units as represented by a cylindrical enclosure. Interaction of radiative and convective transfer is considered for hydrodynamically fully developed, laminar or turbulent flow of a radiatively participating gas through a black wall duct with a specified wall temperature or heat flux distribution. Gas and wall temperature or wall heat flux distributions are sought utilizing the zone method to describe the radient exchange process with gas radiative properties furnished by the weighted sum of gray gases model. The analysis demonstrates that temperature or wall heat flux distributions depend on the boundary conditions and several parameters, namely, the Boltzmann number, gas conduction to radiation factor, volumetric heat generation, turbulent Prandtl number, length to tube diameter ratio, and gas radiative properties. Results are presented for representative values of the governing parameters and different boundary conditions. Effects of zone sizes and radiant distances are also of zone sizes and radiant distances are also examined. Results from these later effects are particularly useful in reducing the storage requirements and computational times associated with the zone method.

• Research Organization: Division of Energy Engineering The University of Iowa, Iowa City, Iowa
• OSTI ID: 6559197
• Journal Information: Am. Soc. Mech. Eng., (Pap.); (United States), Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Vol. 83-HT-53; ISSN ASMSA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ACTIVATION ENERGY
BOLTZMANN EQUATION
BOUNDARY CONDITIONS
CONVECTION
CYLINDERS
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY TRANSFER
EQUATIONS
FLUID FLOW
FLUID MECHANICS
FLUIDS
GASES
HEAT FLOW
HEAT FLUX
HEAT TRANSFER
HYDRODYNAMICS
INTERACTIONS
LAMINAR FLOW
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
POWER GENERATION
RADIATIONS
THERMAL RADIATION
WALLS