Simulation study of entropy production in the one-dimensional Vlasov system

作者：Dai, Zongliang^*; Wang, Shaojie

来源：Physics of Plasmas, 2016, 23(7): 072116.

DOI：10.1063/1.4958819

• GRADIENT-DRIVEN TURBULENCE
• VIOLENT RELAXATION
• STATISTICAL-MECHANICS
• TRANSPORT PROCESSES
• KINETIC SIMULATION
• PLASMAS
• STATES

The coarse-grain averaged distribution function of the one-dimensional Vlasov system is obtained by numerical simulation. The entropy productions in cases of the random field, the linear Landau damping, and the bump-on-tail instability are computed with the coarse-grain averaged distribution function. The computed entropy production is converged with increasing length of coarse-grain average. When the distribution function differs slightly from a Maxwellian distribution, the converged value agrees with the result computed by using the definition of thermodynamic entropy. The length of the coarse-grain average to compute the coarse-grain averaged distribution function is discussed. Published by AIP Publishing.

• 出版日期2016-7
• 单位中国科学技术大学