Numerical solution of transient natural convection around a horizontal wire

Journal Article · Mon May 01 04:00:00 EDT 1989 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3250718· OSTI ID:5897829

Song, Y W ^[1]

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1. Stuttgart Univ. (West Germany)

This work deals with transient natural convection around a horizontal wire having a constant heat flux. The problem arises from the determination of the thermal conductivity of fluids by the transient hot-wire method. Although finite difference solutions of natural convection heat transfer around a heated horizontal cylinder having a constant temperature at the surface of the cylinder were reported for steady-state and transient conditions it appears that no detailed numerical results have been published on the transient heat transfer around a heated cylinder having a constant heat flux. In this work the isotherms and streamlines for Pr = 7 and 0.12 < Ra* < 20 are calculated from the beginning of heating to the time when a steady state is reached. The calculated transition time from conduction to convection agrees very well with experimental results obtained by other authors.

• OSTI ID: 5897829
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 111:2; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer &amp; Fluid Flow
440500* -- Thermal Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
CONVECTION
ENERGY TRANSFER
HEAT TRANSFER
MASS TRANSFER
MEASURING INSTRUMENTS
NATURAL CONVECTION
NUMERICAL SOLUTION
ORIENTATION
PHYSICAL PROPERTIES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSIENTS
WIRES