EFFECT OF HYDRODYNAMIC MEMORY ON DIELECTRIC-RELAXATION
EFFECT OF HYDRODYNAMIC MEMORY ON DIELECTRIC-RELAXATION
复制标题
DOI：
10.1103/physreva.33.699
复制
发表时间：
1986-01-01
影响因子：
2.9
通讯作者：
SEDLAK, JE
中科院分区：
文献类型：
--
作者：
SPARLING, LC;REICHL, LE;SEDLAK, JE
流体动力学记忆是已知的诱导长时间尾巴的速度和角速度自相关函数的布朗粒子，并应影响介电响应。在本文中，我们计算校正的线性介电响应函数，由于流体动力学记忆假设只有潜在的随机过程是高斯。精确的数值结果得到了各种流体参数。得到了一个新的介电响应函数的近似表达式，它比用延迟核的Fokker-Planck方程得到的结果更好。
Hydrodynamic memory is known to induce long-time tails in the velocity and angular-velocity autocorrelation functions of Brownian particles and should affect dielectric response. In this paper we compute corrections to the linear dielectric response function due to hydrodynamic memory assuming only that the underlying stochastic process is Gaussian. Exact numerical results are obtained for a variety of fluid parameters. A new approximate expression for the dielectric response function is obtained, which gives better results than that obtained using a Fokker-Planck equation with a retarded kernel.