Laminar mixed convection flow in a vertical tube
- South Dakota State Univ., Brookings (United States)
A computational study is conducted to quantify the buoyancy effects on laminar forced flow of air in a heated/cooled vertical tube. Buoyancy assisting and buoyancy opposing flow cases are considered for heating/cooling rates that provide either uniform wall temperature or uniform heat flux conditions. The nature of the observed effects of various heating/cooling rates and configurations on the velocity and temperature development, as well as on flow reversal, is explained. Critical buoyancy parameters that signal the onset of flow reversal, as well as axial locations where flow reversal first occurs, are determined in the study. The effects of the buoyancy parameter on friction factors, Nusselt numbers, and flow and thermal entry lengths are documented. 25 refs.
- OSTI ID:
- 6040139
- Journal Information:
- Journal of Thermophysics and Heat Transfer; (United States), Journal Name: Journal of Thermophysics and Heat Transfer; (United States) Vol. 7:2; ISSN 0887-8722; ISSN JTHTEO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
AIR FLOW
COMPUTERIZED SIMULATION
CONVECTION
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FLUID FLOW
FORCED CONVECTION
FRICTION
GAS FLOW
HEAT FLUX
HEAT TRANSFER
LAMINAR FLOW
MASS TRANSFER
NAVIER-STOKES EQUATIONS
NUSSELT NUMBER
PARTIAL DIFFERENTIAL EQUATIONS
PIPES
SIMULATION
STEADY FLOW