TY - JOUR
T1 - Velocity distributions of granular gases with drag and with long-range interactions
AU - Kohlstedt, K.
AU - Snezhko, A.
AU - Sapozhnikov, M. V.
AU - Aranson, I. S.
AU - Olafsen, J. S.
AU - Ben-Naim, E.
PY - 2005/8/5
Y1 - 2005/8/5
N2 - We study velocity statistics of electrostatically driven granular gases. For two different experiments, (i) nonmagnetic particles in a viscous fluid and (ii) magnetic particles in air, the velocity distribution is non-Maxwellian, and its high-energy tail is exponential, P(v)∼exp (-|v|). This behavior is consistent with the kinetic theory of driven dissipative particles. For particles immersed in a fluid, viscous damping is responsible for the exponential tail, while for magnetic particles, long-range interactions cause the exponential tail. We conclude that velocity statistics of dissipative gases are sensitive to the fluid environment and to the form of the particle interaction.
AB - We study velocity statistics of electrostatically driven granular gases. For two different experiments, (i) nonmagnetic particles in a viscous fluid and (ii) magnetic particles in air, the velocity distribution is non-Maxwellian, and its high-energy tail is exponential, P(v)∼exp (-|v|). This behavior is consistent with the kinetic theory of driven dissipative particles. For particles immersed in a fluid, viscous damping is responsible for the exponential tail, while for magnetic particles, long-range interactions cause the exponential tail. We conclude that velocity statistics of dissipative gases are sensitive to the fluid environment and to the form of the particle interaction.
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U2 - 10.1103/PhysRevLett.95.068001
DO - 10.1103/PhysRevLett.95.068001
M3 - Article
C2 - 16090992
AN - SCOPUS:27144481045
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
M1 - 068001
ER -