Analysis of laminar natural convection superimposed on downward flow in vertical tube annulus

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5719149

Kim, J H

The problem of fully developed laminar combined natural and forced convection in vertical concentric circular tube annulus is analyzed for downward flow. Complete closed form analytical solutions for velocity and temperature are obtained for arbitrary conbination of uniform heat fluxes prescribed on the inner and the outer surfaces of the annulus. Nusselt numbers are determined from these solutions. The problem is shown to be characterized by the diameter ratio, the Grashof-to-Reynolds number ratio, and the heat flux ratio. The fundamental solutions that are independent of the heat flux ratio are obtained, from which the general solutions for any heat flux ratio can easily be synthesized.

• OSTI ID: 5719149
• Report Number(s): CONF-851125-
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ABSTRACTS
ANALYTICAL SOLUTION
CIRCULAR CONFIGURATION
CONFIGURATION
CONVECTION
DOCUMENT TYPES
ENERGY TRANSFER
FLOW RATE
FLUID FLOW
FORCED CONVECTION
GRASHOF NUMBER
HEAT FLUX
HEAT TRANSFER
LAMINAR FLOW
LEADING ABSTRACT
MASS TRANSFER
MEETINGS
NATURAL CONVECTION
NUSSELT NUMBER
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
TUBES
VELOCITY