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Effects of the mean field on fluid dynamics in the relaxation time approximation

In this paper the nonequilibrium correction to the distribution function containing a time and space dependent mass is obtained. Given that, fully consistent fluid dynamic equations are formulated. Then, the physics of the bulk viscosity is elaborated for Boltzmann and Bose-Einstein gases within the relaxation time approximation. It is found that the parametric form of the ratio $ζ/τ_R$ for the quantum gas is affected by the infrared cut-off. This may be an indication that the relaxation time approximation is too crude to obtain a reliable form of bulk viscosity.

preprint2020arXivOpen access
Alina CzajkaSigtryggur HaukssonChun ShenSangyong JeonCharles Gale
nucl-th
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Open access5 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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Alina CzajkaSigtryggur HaukssonChun ShenSangyong JeonCharles Gale

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