Math. Model. Nat. Phenom.
Volume 6, Number 4, 2011Granular hydrodynamics
|Page(s)||118 - 150|
|Published online||18 July 2011|
Homogeneous Cooling with Repulsive and Attractive Long-Range Potentials
Multi Scale Mechanics, CTW, UTwente, P. O. Box 217, 7500 AE
Corresponding author E-mail: email@example.com
The interplay between dissipation and long-range repulsive/attractive forces in homogeneous, dilute, mono-disperse particle systems is studied. The pseudo-Liouville operator formalism, originally introduced for hard-sphere interactions, is modified such that it provides very good predictions for systems with weak long-range forces at low densities, with the ratio of potential to fluctuation kinetic energy as control parameter. By numerical simulations, the theoretical results are generalized with empirical, density dependent correction-functions up to moderate densities.
The main result of this study on dissipative cooling is an analytical prediction for the reduced cooling rate due to repulsive forces and for the increased rate due to attractive forces. In the latter case, surprisingly, for intermediate densities, similar cooling behavior is observed as in systems without long-range interactions. In the attractive case, in general, dissipation leads to inhomogeneities earlier and faster than in the repulsive case.
Mathematics Subject Classification: 76T25 / 76P05 / 35Q35
Key words: granular gas / hydrodynamics / long-range forces / numerical simulations
© EDP Sciences, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.