Relaxation-rate formula for the entropic lattice Boltzmann model
نویسندگان
چکیده
منابع مشابه
Single relaxation time model for entropic lattice Boltzmann methods.
For lattice Boltzmann methods based on entropy functions, we derive a collision integral which enables simple identification of transport coefficients, and which circumvents construction of the equilibrium. Implementation of the two-dimensional hydrodynamics demonstrates considerable increase of stability with respect to conventional lattice Boltzmann schemes.
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Variational formula for the relaxation time in the Boltzmann equation.
The relaxation time approximation (RTA) is commonly employed in nonequilibrium statistical mechanics to approximate solutions to the Boltzmann equation in terms of an exponential relaxation to equilibrium. Despite its common use, the RTA suffers from the drawback that relaxation times commonly employed are independent of initial conditions. We derive a variational principle for solutions to the...
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ژورنال
عنوان ژورنال: Chinese Physics B
سال: 2019
ISSN: 1674-1056,2058-3834
DOI: 10.1088/1674-1056/ab48f0