Dissipative particle dynamics for a harmonic chain: A first-principles derivation

被引：59
作者：
Espanol, P
机构：
[1] Departamento de Física Fundamental, Universidad Nacional de Educación a Distancia, Madrid, 28080
来源：
PHYSICAL REVIEW E | 1996年 / 53卷 / 02期
关键词：
D O I：
10.1103/PhysRevE.53.1572
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The equations of dissipative particle dynamics for a linear harmonic chain are deduced from first principles. From the original chain, a coarse-grained chain is constructed by grouping the particles in clusters; the equations of motion for the position and momenta of these clusters are derived. The clusters interact with their neighbors with elastic springs and Brownian dashpots. We provide explicit expressions for the renormalized elastic constant, the friction coefficient, and the amplitude of the random forces.
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页码：1572 / 1578
页数：7
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