Clustering by mixing flows.
Författare och institution:
Kevin Duncan (-); Bernhard Mehlig (Institutionen för fysik); Stellan Östlund (Institutionen för fysik); M. Wilkinson (-)
Publicerad i:
Physical review letters, 95 ( 24 ) s. 240602
ISSN:
0031-9007
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2005
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
We calculate the Lyapunov exponents for particles suspended in a random three-dimensional flow, concentrating on the limit where the viscous damping rate is small compared to the inverse correlation time. In this limit Lyapunov exponents are obtained as a power series in epsilon, a dimensionless measure of the particle inertia. Although the perturbation generates an asymptotic series, we obtain accurate results from a Padé-Borel summation. Our results prove that particles suspended in an incompressible random mixing flow can show pronounced clustering when the Stokes number is large and we characterize two distinct clustering effects which occur in that limit.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik
Fysik
Postens nummer:
58257
Posten skapad:
2007-10-26 15:28
Posten ändrad:
2007-10-30 09:18