TY  - JOUR
A1  - Ambruş, Victor E.
A1  - Molnár, Etele
T1  - Shakhov-type extension of the relaxation time approximation in relativistic kinetic theory and second-order fluid dynamics
T2  - Physics Letters B
N2  - We present a relativistic Shakhov-type generalization of the Anderson-Witting relaxation time model for the Boltzmann collision integral to modify the ratio of momentum diffusivity to thermal diffusivity. This is achieved by modifying the path on which the single particle distribution function fk approaches local equilibrium f0k by constructing an intermediate Shakhov-type distribution fSk similar to the 14-moment approximation of Israel and Stewart. We illustrate the effectiveness of this model in case of the Bjorken expansion of an ideal gas of massive particles and the damping of longitudinal waves through an ultrarelativistic ideal gas.
KW  - Relativistic kinetic theory
KW  - Relaxation time approximation
KW  - Shakhov model
KW  - Bjorken flow
Y1  - 2024
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/85783
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-857836
SN  - 0370-2693
VL  - 2024
IS  - 138795, In Press, Journal Pre-proof
PB  - Elsevier
CY  - Amsterdam
ER  -