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Göteborgs universitets publikationer

Settling of an asymmetric dumbbell in a quiescent fluid

Författare och institution:
F. Candelier (-); Bernhard Mehlig (Institutionen för fysik (GU))
Publicerad i:
Journal of Fluid Mechanics, 802 s. 174-185
ISSN:
0022-1120
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
We compute the hydrodynamic torque on a dumbbell (two spheres linked by a massless rigid rod) settling in a quiescent fluid at small but finite Reynolds number. The spheres have the same mass densities but different sizes. When the sizes are quite different, the dumbbell settles vertically, aligned with the direction of gravity, the largest sphere first. But when the size difference is sufficiently small, then its steady-state angle is determined by a competition between the size difference and the Reynolds number. When the sizes of the spheres are exactly equal, then fluid inertia causes the dumbbell to settle in a horizontal orientation.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik
Nyckelord:
low-Reynolds-number flows, REYNOLDS-NUMBER, FIBER SUSPENSIONS, FLOW, PARTICLES, MOTION, INSTABILITY, TURBULENCE, SPHERE, SEDIMENTATION, INERTIA, UPPACHER H. R., 2010, Microphysics of Clouds and Precipitation, OUDMAN I., 1957, J. Fluid Mech., V22, P385
Postens nummer:
242033
Posten skapad:
2016-09-20 12:52

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