The University of Southampton
University of Southampton Institutional Repository

Large-eddy simulation of heat transfer from a single cube mounted on a very rough wall

Large-eddy simulation of heat transfer from a single cube mounted on a very rough wall
Large-eddy simulation of heat transfer from a single cube mounted on a very rough wall
The local thermal effects in the wake of a single cube, which represents a tall building in an urban area, are studied using large-eddy simulations (LES) for forced, mixed and free convection cases that are characterised by Richardson number, Ri. New wall models are implemented for momentum, temperature and rough surfaces. Comparison of the flow and thermal fields with the wind-tunnel data of Richards et al. (2006) shows fair agreement. Buoyancy effects are quite evident at high Ri and a significant increase in the turbulence levels is observed for such flows. The thermal boundary layer thickness was estimated for different heated surfaces of the cube and its variation with Ri was studied. The heat transfer coefficient for different degrees of thermal forcing was obtained and compared with earlier studies. Quadrant analysis was performed on momentum and heat along the shear layer behind the cube to identify the organised structures.
heat flux, rough wall, single cube, wall model
0006-8314
347–368
Boppana, V.B.L.
817ed7fa-d262-451f-a442-ee8c9b8a2cb0
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Castro, I.P.
66e6330d-d93a-439a-a69b-e061e660de61
Boppana, V.B.L.
817ed7fa-d262-451f-a442-ee8c9b8a2cb0
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Castro, I.P.
66e6330d-d93a-439a-a69b-e061e660de61

Boppana, V.B.L., Xie, Zheng-Tong and Castro, I.P. (2013) Large-eddy simulation of heat transfer from a single cube mounted on a very rough wall. Boundary-Layer Meteorology, 147 (3), 347–368. (doi:10.1007/s10546-012-9793-7).

Record type: Article

Abstract

The local thermal effects in the wake of a single cube, which represents a tall building in an urban area, are studied using large-eddy simulations (LES) for forced, mixed and free convection cases that are characterised by Richardson number, Ri. New wall models are implemented for momentum, temperature and rough surfaces. Comparison of the flow and thermal fields with the wind-tunnel data of Richards et al. (2006) shows fair agreement. Buoyancy effects are quite evident at high Ri and a significant increase in the turbulence levels is observed for such flows. The thermal boundary layer thickness was estimated for different heated surfaces of the cube and its variation with Ri was studied. The heat transfer coefficient for different degrees of thermal forcing was obtained and compared with earlier studies. Quadrant analysis was performed on momentum and heat along the shear layer behind the cube to identify the organised structures.

Text
singlecube_roughwall2013.pdf - Other
Download (1MB)

More information

Published date: June 2013
Keywords: heat flux, rough wall, single cube, wall model
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 340719
URI: https://eprints.soton.ac.uk/id/eprint/340719
ISSN: 0006-8314
PURE UUID: dfb2e07d-4b75-4985-b295-69026f4c1c41
ORCID for Zheng-Tong Xie: ORCID iD orcid.org/0000-0002-8119-7532

Catalogue record

Date deposited: 02 Jul 2012 10:08
Last modified: 20 Jul 2019 00:57

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×