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Emergent order in r...
Emergent order in rheoscopic swirls
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Wilkinson, M. (författare)
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Bezuglyy, V. (författare)
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- Mehlig, Bernhard, 1964 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: JOURNAL OF FLUID MECHANICS. - 0022-1120. ; 667, s. 158-187
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- We consider the ordering of particles in a rheoscopic fluid (a suspension of microscopic rod-like particles) in a steady two-dimensional flow, and discuss its consequences for the reflection of light. The ordering is described by an order parameter which is a non-oriented vector, obtained by averaging solutions of a nonlinear equation containing the strain rate of the fluid flow. Exact solutions of this equation are obtained from solutions of a linear equation which are analogous to Bloch bands for a one-dimensional Schrodinger equation with a periodic potential. On some contours of the stream function, the order parameter approaches a limit, and on others it depends increasingly sensitively upon position. However, in the long-time limit a local average of the order parameter is a smooth function of position in both cases. We analyse the topology of the order parameter and the structure of the generic zeros of the order parameter field.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- general fluid mechanics; suspensions
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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