2009/06/30 by A. Wiranata, Anton Wiranata, Madappa Prakash +1 · 18 citations
Physics and Astronomy · Psychology · #Environmental science #Hadron #High-Energy Particle Collisions Research #Materials science #Nuclear physics #Particle physics #Physics #Psychology #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #Statistical physics #Thermodynamics #Viscosity #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2009.09.023
published in Nuclear Physics A 830(1-4), 219c-222c (Elsevier BV) · 4 pages, 1 figure, Contribution to Quark Matter 2009, Knoxville, Tennessee, USA
arxiv created 2009/09/16 · openalex publication_date 2009/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that first approximations to the bulk viscosity ηv are expressible in terms of factors that depend on the sound speed vs, the enthalpy, and the interaction (elastic and inelastic) cross section. The explicit dependence of ηv on the factor (\frac 13 - vs2) is demonstrated in the Chapman-Enskog approximation as well as the variational and relaxation time approaches. The interesting feature of bulk viscosity is that the dominant contributions at a given temperature arise from particles which are neither extremely nonrelativistic nor extremely relativistic. Numerical results for a model binary mixture are reported.