Transient conjugated forced convection heat transfer with fully developed laminar flow in pipes

Journal Article · · Numerical Heat Transfer. Part A, Applications; (United States)

OSTI ID:6441563

Lee, Kuantzong ^[1]; Yan, Weimon ^[2]

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1. Oriental Inst. of Tech., Taipei (Taiwan, Province of China)
2. Hua Fan Inst. of Tech., Taipei (Taiwan, Province of China)

This work deals with the problem of transient conjugated forced convection heat transfer with fully developed laminar flow in an infinitely long pipe, in which the external surface over a finite length of pipe is subject to a constant wall temperature. The effects are presented of Peclet number, ratios of pipe radii, wall-to-fluid diffusivity, and conductivity on the interfacial heat flux. The predicted results show that the unsteady heat transfer characteristics depend strongly on the ratios of outside and inside radii, wall-to-fluid conductivity, and thermal diffusivity. Additionally, the decrease in diffusivity ratio A from 10 to 0.1 results in a longer time for the system to reach the steady state condition from [tau] = 6.4 to [tau] = 265.

• OSTI ID: 6441563
• Journal Information: Numerical Heat Transfer. Part A, Applications; (United States), Vol. 23:3; ISSN 1040-7782
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
PIPES
FORCED CONVECTION
LAMINAR FLOW
ASPECT RATIO
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
CONVECTION
ENERGY TRANSFER
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
420400* - Engineering- Heat Transfer & Fluid Flow