Turbulence modification in shear thinning fluids: preliminary results for power law rheology

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Abstract

Direct numerical simulations of the turbulent pipe flow of powerlaw fluids are analysed in order to understand the way in which shear thinning affects turbulence. For a generalised Reynolds number of 7500, as the fluid becomes more shear thinning, the log-layer mean velocity profile deviates further above the Newtonian case. Second-order turbulence statistics show a decrease for all correlations except for the axial turbulence intensity which increases marginally over its Newtonian counterpart. The results show that the turbulent kinetic energy budget is modified by new terms that arise in the energy equation.

Original languageEnglish
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
Subtitle of host publicationLaunceston Tasmania; 3-7 December 2012
EditorsP A Brandner, B W Pearce
Place of PublicationParkville Vic Australia
PublisherAustralasian Fluid Mechanics Society
Pages1 - 4
Number of pages4
ISBN (Electronic)9780646583730
ISBN (Print)9780646583730
Publication statusPublished - 2012
EventAustralasian Fluid Mechanics Conference 2012 - University of Tasmania (Newnham Campus), Launceston, Australia
Duration: 3 Dec 20127 Dec 2012
Conference number: 18th
http://www.18afmc.com.au/

Conference

ConferenceAustralasian Fluid Mechanics Conference 2012
Abbreviated titleAFMC 2012
CountryAustralia
CityLaunceston
Period3/12/127/12/12
OtherThe 18th AFMC is to be the 1st of a series which will be held every 2 years by The Australasian Fluid Mechanics Society.
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