Velocity Gradient Power Functional for Brownian Dynamics

被引：31
作者：
de las Heras, Daniel [1 ]
Schmidt, Matthias [1 ]
机构：
[1] Univ Bayreuth, Theoret Phys 2, Phys Inst, D-95440 Bayreuth, Germany
来源：
PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 02期
关键词：
STATISTICAL-MECHANICS; SHEAR; NONUNIFORM; LIQUID;
D O I：
10.1103/PhysRevLett.120.028001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present an explicit and simple approximation for the superadiabatic excess (over ideal gas) free power functional, admitting the study of the nonequilibrium dynamics of overdamped Brownian many-body systems. The functional depends on the local velocity gradient and is systematically obtained from treating the microscopic stress distribution as a conjugate field. The resulting superadiabatic forces are beyond dynamical density functional theory and are of a viscous nature. Their high accuracy is demonstrated by comparison to simulation results.
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页数：6
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