Particle-Laden Pipe Flows at High Volume Fractions Show Transition Without Puffs
نویسندگان
چکیده
منابع مشابه
Self-similarity in particle laden flows at constant volume
We consider constant volume thin film slurries on an incline. Clear fluids in this geometry are known to have a front position that moves according to a t scaling law, based on similarity solution analysis [Huppert, Nature, 1982]. We investigate the same dynamics for particle laden flow using a recently proposed lubrication model for the slurry and physical experiments. Our analysis includes th...
متن کاملEffects of coupling on turbulent gas-particle boundary layer flows at borderline volume fractions using kinetic theory
This study is concerned with the prediction of particles’ velocity in a dilute turbulent gas-solidboundary layer flow using a fully Eulerian two-fluid model. The closures required for equationsdescribing the particulate phase are derived from the kinetic theory of granular flows. Gas phaseturbulence is modeled by one-equation model and solid phase turbulence by MLH theory. Resultsof one-way and...
متن کاملTurbulent stresses and particle break-up criteria in particle-laden pipe flows
http://dx.doi.org/10.1016/j.ijheatfluidflow.2015.02.001 0142-727X/ 2015 Elsevier Inc. All rights reserved. ⇑ Corresponding author. Tel.: +31 402472923; fax: +31 402475399. E-mail addresses: [email protected] (J.L.G. Oliveira), [email protected] (C.W.M. van der Geld). 1 Present address: Mobility Center, Federal University of Santa Catarina, Joinville, SC 89218-000, Brazil. J.L.G. Oliveira ,...
متن کاملGranular and Particle-Laden Flows
This research programme at the Newton Institute was devoted to improving the understanding and mathematical modelling of granular and particle-laden fluid systems as they arise in nature, in the laboratory and in industry. Geophysical examples of granular and particle-laden flows include rock avalanches, debris flows, mud flows and turbulent boundary layers with suspended particles, such as vol...
متن کاملLaminar-to-turbulent transition of pipe flows through puffs and slugs
Laminar-to-turbulent transition of pipe flows occurs, for sufficiently high Reynolds numbers, in the form of slugs. These are initiated by disturbances in the entrance region of a pipe flow, and grow in length in the axial direction as they move downstream. Sequences of slugs merge at some distance from the pipe inlet to finally form the state of fully developed turbulent pipe flow. This format...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2018
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.121.194501