Onsager principle as a tool for approximation  

作　　者：Masao Doi 

机构地区：[1]Center of Soft Matter Physics and Its Applications,Beihang University

出　　处：《Chinese Physics B》2015年第2期1-6,共6页中国物理B（英文版）

基　　金：supported by Otto Moensted Foundation to give a lecture course on soft matter physics

摘　　要：Onsager principle is the variational principle proposed by Onsager in his celebrated paper on the reciprocal relation.The principle has been shown to be useful in deriving many evolution equations in soft matter physics.Here the principle is shown to be useful in solving such equations approximately.Two examples are discussed：the diffusion dynamics and gel dynamics.Both examples show that the present method is novel and gives new results which capture the essential dynamics in the system.Onsager principle is the variational principle proposed by Onsager in his celebrated paper on the reciprocal relation.The principle has been shown to be useful in deriving many evolution equations in soft matter physics.Here the principle is shown to be useful in solving such equations approximately.Two examples are discussed：the diffusion dynamics and gel dynamics.Both examples show that the present method is novel and gives new results which capture the essential dynamics in the system.

关 键 词：reciprocal relation dissipation function Rayleighian slow variable diffusion dynamics gel dynamics 

分 类 号：O313[理学—一般力学与力学基础]