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Phys. Rev. Lett. 95, 068002 (2005) [4 pages]

Nearly Smooth Granular Gases

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Isaac Goldhirsch1,*, S. H. Noskowicz1,†, and O. Bar-Lev2,‡
1Department of Fluid Mechanics and Heat Transfer, Tel-Aviv University, Ramat-Aviv, Tel-Aviv 69978, Israel
2School of Mathematics, Tel-Aviv University, Ramat-Aviv, Tel-Aviv 69978, Israel

Received 8 July 2004; revised 2 May 2005; published 1 August 2005

Hydrodynamic equations for nearly smooth granular gases are derived from the pertinent Boltzmann equation. The angular velocity distribution field needs to be included in the set of hydrodynamic fields. The angular velocity distribution is strongly non-Maxwellian for the homogeneous cooling state and any homogeneous steady state. In the case of steady wall-bounded shear flows the average spin (created at the boundaries) has a finite penetration length into the bulk.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.068002
DOI:
10.1103/PhysRevLett.95.068002
PACS:
45.70.Mg, 47.45.−n, 51.10.+y, 51.20.+d

*Electronic address: isaac@eng.tau.ac.il

Electronic address: henri@eng.tau.ac.il

Electronic address: fnbarlev@post.tau.ac.il