منابع مشابه
Hydrodynamic modes in dense trapped ultracold gases.
We consider the hydrodynamic modes for dense trapped ultracold gases, where the interparticle distance is comparable to the scattering length. We show that the experimental determination of the hydrodynamic mode frequencies allows one to obtain quite directly the equation of state of a dense gas. As an example, we investigate the case of two equal fermionic populations in different hyperfine st...
متن کاملVelocity correlations in dense granular gases.
We report the statistical properties of spherical steel particles rolling on an inclined surface being driven by an oscillating wall. Strong dissipation occurs due to collisions between the particles and can be tuned by changing the number density. The velocities of the particles are observed to be correlated over large distances comparable to the system size. The distribution of velocities dev...
متن کاملDiffusion in Granular Gases of Viscoelastic Particles
Abstract. In most of the literature on granular gases it is assumed that the restitution coefficient ǫ, which quantifies the loss of kinetic energy upon a collision is independent on the impact velocity. Experiments as well as theoretical investigations show, however, that for real materials the restitution coefficient depends significantly on the impact velocity. We consider the diffusion proc...
متن کاملDiffusion of Rarified Gases in Silicon Nanotubes
1. Introduction Transport of molecules in confined spaces is one of the fundamental problems still requiring theoretical description. The so far existing theories, starting with the Knudsen prediction for diffusion of non-interacting gases in long capillary tubes and subsequent classical theories do not properly capture the effects of interactions of molecules with the pore walls. Recent comput...
متن کاملA new kinetic equation for dense gases
Alexander, Garcia and Alder [1] introduced the Consistent Boltzmann Algorithm (CBA) as a simple variant of Direct Simulation Monte Carlo (DSMC) for dense gases. In CBA, collisions alter both the positions and velocities of the particles. In the present work the limiting kinetic equation for CBA is derived; the formulation is similar to the proof that the Boltzmann equation is the limiting kinet...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 1962
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.1733354