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Towards the numerical investigation of rough surfaces in quasi two-dimensional Rayleigh-Benard convection

Wagner, Sebastian and Shishkina, Olga (2013) Towards the numerical investigation of rough surfaces in quasi two-dimensional Rayleigh-Benard convection. ETC14, Lyon, Frankreich.

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Official URL: http://etc14.ens-lyon.fr

Abstract

We present investigations on the motion of the large-scale circulations (LSCs) in turbulent mixed convection in a cuboidal cavity. The experimental studies are performed by combined temperature and velocity measurements. Analysis of temperature measurements in previous studies revealed three different dynamical scenarios: stable LSCs, LSCs with spontaneous reversals as well as periodically oscillating temperature signals, which correspond to a continuous motion of the LSCs. In the work presented here, we extend the temperature measurements by velocity measurements. These combined investigations help to answer open questions concerning the dynamics of the LSCs within the sample. In specific, we address the question which of the various dynamical processes observed in Rayleigh-Bénard convection in cylindrical samples, e.g. torsional oscillations or reversals of the LSC, also occur in our cuboidal cavity in mixed convection.

Item URL in elib:https://elib.dlr.de/80919/
Document Type:Conference or Workshop Item (Speech)
Title:Towards the numerical investigation of rough surfaces in quasi two-dimensional Rayleigh-Benard convection
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, SebastianSebastian.Wagner (at) DLR.deUNSPECIFIED
Shishkina, OlgaOlga.Shishkina (at) DLR.deUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-2
Series Name:Conference Proceedings on USB-Stick
Status:Published
Keywords:Rayleigh-Benard convection, roughness, quasi two-dimensional
Event Title:ETC14
Event Location:Lyon, Frankreich
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Projekt Next Generation Train (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Wagner, Sebastian
Deposited On:18 Oct 2013 10:15
Last Modified:08 May 2014 23:16

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