Laminar, fully developed mixed convection in a vertical eccentric annulus

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Numerical Heat Transfer. Part A, Applications; (United States)

DOI:https://doi.org/10.1080/10407789208944759· OSTI ID:7291337

Sathyamurthy, P; Patankar, S V ^[1]; Karki, K C ^[2]

---

1. Dept. of Mechanical Engineering, Univ. of Minnesota, Minneapolis, MN (US)
2. Innovative Research, Inc., Minneapolis, MN (US)

Combined free and forced convection in vertical annular passages is important in the design of coolant channels for power transformers, nuclear reactors, double-pipe heat exchangers, certain types of catalytic converters, and modern electronic equipment. Although most such equipment is designed to operate in a turbulent flow regime, laminar flow and heat transfer become important when the equipment operates under reduced power or during accidental pump failure. This paper presents a numerical study of laminar, fully developed mixed convection in vertical eccentric annular ducts. The equations governing the velocity and temperature are solved on a body-conforming grid by using a finite-volume technique. The effects of radius ratio, eccentricity, and Rayleigh number on the friction factor and the Nusselt number are discussed. The buoyancy forces significantly increase both friction and heat transfer. The effect of buoyancy is stronger for configuration with larger eccentricities.

• OSTI ID: 7291337
• Journal Information: Numerical Heat Transfer. Part A, Applications; (United States), Journal Name: Numerical Heat Transfer. Part A, Applications; (United States) Vol. 22:1; ISSN 1040-7782; ISSN NHAAE
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
24 POWER TRANSMISSION AND DISTRIBUTION
240100 -- Power Systems-- (1990-)
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
CATALYTIC CONVERTERS
COOLANT LOOPS
COOLING SYSTEMS
DESIGN
DISPERSIONS
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
FAILURES
FLUID FLOW
FLUIDS
HEAT EXCHANGERS
LAMINAR FLOW
MIXTURES
NUMERICAL SOLUTION
POLLUTION CONTROL EQUIPMENT
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
TRANSFORMERS
TURBULENT FLOW