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Laminar and turbulent transition of non-newtonian slurries

SYSNO ASEP	0361108
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Laminar and turbulent transition of non-newtonian slurries
Author(s)	Vlasák, Pavel (UH-J)_{SAI, ORCID, RID} Chára, Zdeněk (UH-J)_{SAI, ORCID, RID}
Source Title	Matematičeskije metody v technike i technologijach MMTT-24, Sekcija 3 - Tom 3. - Saratov : Saratovskij gosudarstvennyj techničeskij universitet, 2011 - ISBN 978-5-7433-2386-9
Pages	s. 16-20
Number of pages	5 s.
Action	Meždunarodnaja naučnaja konferencija Matematičeskije metody v technike i technologijach /24./
Event date	31.05.2011-02.06.2011
VEvent location	Kyjev
Country	UA - Ukraine
Event type	WRD
Language	eng - English
Country	RU - Russian Federation
Keywords	kaolin slurry ; fly ash slurry ; laminar/turbulent transition ; pressure fluctuation
Subject RIV	BK - Fluid Dynamics
R&D Projects	GAP105/10/1574 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20600510 - UH-J (2005-2011)
Annotation	The Kaolin and fly ash slurries were measured on the experimental pipeline loop of inner diameter 17.5, 26.8 and 36 mm. An attention was paid to the laminar/turbulent transition, which can be well indicating by pressure fluctuations. At the beginning of the laminar/turbulent transition the hydraulic gradient steeply increases with increasing velocity. It is accompanied by the different patterns of the differential pressure fluctuation for the laminar, transitional and turbulent regimes. In the laminar regime the pressure fluctuations are of small amplitude and temporally limited. A high level of instability, eddy formation and pressure fluctuation are characteristic for the transition region, the amplitude of pressure fluctuations increases with increasing slurry velocity. For the turbulent regime the frequency of pressure pulsations becomes higher and due to filtration of the pressure signal the pressure gradient record seems to be relatively smoother.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2012

Number of the records: 1