Loughborough University
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Flow and surface heat transfer analysis of a square cylinder in turbulent cross-flow

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journal contribution
posted on 2019-02-14, 11:14 authored by Shaun Chen, Hao XiaHao Xia
Flow passing a heated square cylinder is investigated using a hybrid LES-RANS approach on unstructured grids at a moderate Reynolds number of 22, 050. The effects of inflow turbulence on the flow field as well as surface convective heat transfer are studied by adopting a grid-based random-number method (GRM). Validation of the GRM method is carried out by generating and simulating a decaying homogeneous isotropic turbulent flow. Analysis of the turbulent quantities and comparisons with the Synthetic Coherent Eddy Method (SCEM) suggest that the cheaper GRM is able to generate good quality inflow turbulence, despite a longer transition region is required. Studies of the heated square cylinder in crossflow show that the inflow turbulence results in an early breakup of the shear layer, which leads to further effects on the vortex shedding and surface heat transfer. The surface convective heat transfer is increased with inflow turbulence, especially on the front, top and bottom surfaces, while limited influence is found on the rear surface. It is shown by the spectra that the effects of the inflow turbulence mainly focus on the turbulent shear layers, as well as heat transfer of the corresponding surfaces.

Funding

Department of Aeronautical and Automotive Engineering

Rolls-Royce UTC at Loughborough University

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Numerical Heat Transfer, Part A: Applications

Volume

75

Issue

12

Pages

795 - 823

Citation

CHEN, X-S. and XIA, H., 2019. Flow and surface heat transfer analysis of a square cylinder in turbulent cross-flow. Numerical Heat Transfer, Part A: Applications, 75 (12), pp.795-823

Publisher

Taylor & Francis

Version

  • AM (Accepted Manuscript)

Rights holder

© Taylor & Francis

Publisher statement

This is an Accepted Manuscript of an article published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications on 10 May 2019, available online: http://www.tandfonline.com/10.1080/10407782.2019.1594337.

Acceptance date

2018-10-21

Publication date

2019-05-10

Copyright date

2019

ISSN

1040-7782

eISSN

1521-0634

Language

  • en