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Pipe flow with large particles and their impact on the transition to turbulence
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-7275-8756
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-2504-3969
Lund Univ, Dept Food Technol Engn & Nutr, SE-22100 Lund, Sweden.;Tetra Pak Proc Syst AB, SE-22355 Lund, Sweden..
2020 (English)In: Physical Review Fluids, E-ISSN 2469-990X, Vol. 5, no 11, article id 112301Article in journal (Refereed) Published
Abstract [en]

The classical transition from laminar to turbulent flow is affected if solid particles are added. The transition behavior is a function of particle size d and solid volume fraction phi and the flow undergoes a smooth transition, as opposed to intermittent, if phi exceeds a certain threshold. In this work we show that, for particle-laden pipe flows with large particle-to-pipe diameter ratios d/D, the phi threshold for altering the transition is much lower than previously reported for smaller particles. Magnetic resonance velocimetry reveals that particles introduce turbulent-like fluid velocity fluctuations in laminar flow. Factors that might control the limits between "classical" and "smooth" transition in the state space spanned by d/D and phi are discussed based on scaling analyses.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2020. Vol. 5, no 11, article id 112301
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-287504DOI: 10.1103/PhysRevFluids.5.112301ISI: 000589611200001Scopus ID: 2-s2.0-85097573147OAI: oai:DiVA.org:kth-287504DiVA, id: diva2:1533840
Note

QC 20210303

Available from: 2021-03-03 Created: 2021-03-03 Last updated: 2022-06-25Bibliographically approved

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Leskovec, MartinLundell, Fredrik

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Fluid Mechanics and Engineering AcousticsLinné Flow Center, FLOWWallenberg Wood Science Center
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