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Measurements and heat-flux transport modelling in a heated cylinder wake
KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-2711-4687
1998 (English)In: International Journal of Heat and Fluid Flow, ISSN 0142-727X, E-ISSN 1879-2278, no 19, 556-562 p.Article in journal (Refereed) Published
Abstract [en]

Hot-wire measurements of velocity and temperature fluctuations have been made in the self-preserving turbulent wake region of a heated cylinder. Second order statistics including Reynolds fluxes, , are determined along with relevant triple correlations appearing in the Reynolds stress and Reynolds flux transport equations. The primary aim with these measurements is to study different modelling levels for passive scalar quantities. Models for the pressure scalar-gradient correlation, appearing in the transport equation of the Reynolds fluxes, are compared to measured data. A significant improvement of the simplest model, , is achieved by including a model for the rapid term that is linear in the mean velocity gradients. The mixed timescale, , seems to be an appropriate choice for τ. Also models for the triple correlations, , are compared with the experiments.

Place, publisher, year, edition, pages
1998. no 19, 556-562 p.
Keyword [en]
Cylinders (shapes), Equations of motion, Mathematical models, Stress analysis, Temperature measurement, Turbulence, Velocity measurement, Wakes
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Mechanics
URN: urn:nbn:se:kth:diva-148133DOI: 10.1016/S0142-727X(98)10018-8ISI: 000075562500018ScopusID: 2-s2.0-17344392898OAI: diva2:735337

QC 20150320

Available from: 2014-07-25 Created: 2014-07-25 Last updated: 2015-03-20Bibliographically approved

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Wikström, Petra M.Hallbäck, MagnusJohansson, Arne, V.
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