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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

CFD Modelling of Flow over in-Line Tube-Banks

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

Brian E. Launder
School of Mechanical, Aerospace & Civil Engineering, The University of Manchester, PO Box 88, Manchester M60 1QD, UK

Alastair West
Turbulence Mechanics Group, School of MACE, University of Manchester

DOI: 10.1615/IHTC15.hex.009644
pages 3683-3697


KEY WORDS: Heat exchanger, Turbulent transport, Convection Turbulence modelling CFD

Abstract

The paper reports the outcome of applying different computational strategies in modelling turbulent flow and local heat-transfer coefficients around in-line tube banks. The suitability and accuracy of wall-resolved Large Eddy Simulation (LES) and Unsteady Reynolds-Averaged Navier-Stokes (URANS) approaches are examined for generic, square, in-line tube banks, where experimental data are limited but available. Within the latter approach, both eddy-viscosity and Reynolds-stress-transport models have been tested. The assumption of flow periodicity in all three directions is investigated by varying the domain size. It is found that the path taken by the fluid through the tube-bank configuration differs according to the assumed flow dimensionality and the treatment of turbulence. Finally, the important effect of confining walls is shown by making direct comparison with the available experiments.

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