The effect of buoyancy on laminar flow and heat transfer in the entrance region between horizontal, parallel plates

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Int. Chem. Eng.; (United States)

OSTI ID:5260406

Naito, E

The effect of buoyancy on laminar-flow heat transfer in the entrance region between horizontal, parallel plates was analyzed two-dimensionally for both a uniform wall temperature and a uniform heat flux. The equations for the conservation of momentum are solved using the Boussinesq approximation for: both walls heated equally; the upper wall heated with the lower wall insulated; and vice versa. The velocity and temperature profiles at the inlet were assumed to be uniform, and the entering flow to be nonrotational (at X' = 0, u /SUB o/ ' = constant, v' = O, ..omega..' = O, and t /SUB o/ ' = constant). Numerical calculations were performed over the ranges: 30less than or equal to Re /SUB o/ less than or equal to 300 and 0less than or equal to Ra less than or equal to 1,800 and for Pr = 0.71. The results for the velocity profile, pressure gradient, shear stress at the wall, temperature profile, and local Nusselt number, are plotted to show the effects of buoyancy.

• Research Organization: Department of Mechanical Engineering, Shiga Prefecture Junior College, 1900 Hassaka-cho, Hikone-chi
• OSTI ID: 5260406
• Journal Information: Int. Chem. Eng.; (United States), Journal Name: Int. Chem. Eng.; (United States) Vol. 25:2; ISSN INCEA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ENERGY TRANSFER
FLOW RATE
FLUID FLOW
HEAT TRANSFER
LAMINAR FLOW
MECHANICAL PROPERTIES
NUSSELT NUMBER
PRESSURE GRADIENTS
SHEAR PROPERTIES
TEMPERATURE GRADIENTS