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Modelling the wall roughness influence on the heat transfer in thermal convection

Shishkina, Olga and Wagner, Claus (2011) Modelling the wall roughness influence on the heat transfer in thermal convection. Journal of Fluid Mechanics, Vol. 686, pp. 568-582. Cambidge University Press. DOI: 10.1017/jfm.2011.348

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Official URL: http://journals.cambridge.org

Abstract

The work is devoted to investigation of the heat transport in thermal convection, enhanced by the roughness of heated/cooled horizontal plates. The roughness is introduced by a set of rectangular heated/cooled obstacles located at the corresponding plates. Based on the boundary layer equations, a new analytical model for the estimation of Nusselt number deviations caused by the wall roughness is developed and presented. For validation of this model, the transport of heat and momentum in rectangular convection cells is also studied numerically, for different aspect ratios of the obstacles, the height of which is significantly higher than the thickness of the thermal boundary layers.

Item URL in elib:https://elib.dlr.de/65111/
Document Type:Article
Title:Modelling the wall roughness influence on the heat transfer in thermal convection
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Shishkina, OlgaOlga.Shishkina (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2011
Journal or Publication Title:Journal of Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol. 686
DOI :10.1017/jfm.2011.348
Page Range:pp. 568-582
Publisher:Cambidge University Press
Status:Published
Keywords:Turbulent Rayleigh--B\'enard convection, heat transfer, wall roughness numerical simulations, Nusselt number
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Shishkina, PD Dr. habil. Olga
Deposited On:28 Nov 2011 15:29
Last Modified:08 Mar 2018 18:43

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