Transient conjugated forced convection in turbulent pipe flows

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Numerical Heat Transfer. Part A, Applications

DOI:https://doi.org/10.1080/10407789508913695· OSTI ID:31918

Lee, K T ^[1]; Yan, W M ^[2]

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1. Oriental Inst. of Tech., Taipei (Taiwan, Province of China). Dept. of Mechanical Engineering
2. Hua Fan Coll. of Humanities and Technology, Taipei (Taiwan, Province of China). Dept. of Mechanical Engineering

This work deals with the problem of transient conjugated forced convection heat transfer in turbulent pipe flows. The external surface of the pipe over a finite heated section is subjected to either uniform heat flux or uniform wall temperature. The governing parameters identified in this work are the Reynolds number Re, the wall-to-fluid conductivity ratio K, the wall-to-fluid diffusivity ratio A, the dimensionless wall thickness {Delta}, and the Prandtl number Pr. A modified low-Re {kappa}-{epsilon} turbulent model is adopted to solve for the fully developed velocity and eddy viscosity distributions. Predicted results show that effects of wall conduction and wall heat capacity have a significant impact on the unsteady heat transfer, especially in the early transient period.

• Sponsoring Organization: USDOE
• OSTI ID: 31918
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 2 Vol. 27; ISSN NHAAES; ISSN 1040-7782
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
FORCED CONVECTION
FOSSIL-FUEL POWER PLANTS
HEAT EXCHANGERS
NUCLEAR POWER PLANTS
THERMAL CONDUCTION
TRANSIENTS