We describe the velocity distribution function of a granular gas of electrically charged particles by means of a Sonine polynomial expansion and study the decay of its granular temperature. We find a dependence of the first non-trivial Sonine coefficient, a2, on time through the value of temperature. In particular, we find a sudden drop of a2 when temperature approaches a characteristic value, , describing the electrostatic interaction. For lower values of T, the velocity distribution function becomes Maxwellian. The theoretical calculations agree well with numerical direct simulation Monte Carlo to validate our theory.
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Research Article| August 21 2017
Homogeneous cooling state of dilute granular gases of charged particles
Satoshi Takada a)
Department of Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502,
Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502,
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Satoshi Takada, Dan Serero, Thorsten Pöschel; Homogeneous cooling state of dilute granular gases of charged particles. Physics of Fluids 1 August 2017; 29 (8): 083303. https://doi.org/10.1063/1.4993620
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