Violation of Molecular Chaos in dissipative gases
Thorsten Poeschel, Nikolai V. Brilliantov, and Thomas Schwager
TL;DR
This paper investigates how velocity correlations in dissipative gases affect their cooling rate, introducing a new coefficient to quantify these correlations and comparing analytical predictions with numerical simulations.
Contribution
It proposes a novel coefficient to quantify velocity correlations and links it to the temperature decay rate in dissipative gases, supported by analytical and numerical comparison.
Findings
Velocity correlations influence the cooling rate.
A new coefficient effectively characterizes velocity correlations.
Analytical results align with numerical simulations.
Abstract
Numerical simulations of a dissipative hard sphere gas reveal a dependence of the cooling rate on correlation of the particle velocities due to inelastic collisions. We propose a coefficient which characterizes the velocity correlations in the two-particle velocity distribution function and express the temperature decay rate in terms of this coefficient. The analytical results are compared with numerics.
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