中国物理B ›› 2016, Vol. 25 ›› Issue (11): 110504-110504.doi: 10.1088/1674-1056/25/11/110504

• GENERAL • 上一篇    下一篇

Anomalous transport in fluid field with random waiting time depending on the preceding jump length

Hong Zhang(张红), Guo-Hua Li(李国华)   

  1. Department of Mathematics Teaching, Chengdu University of Technology, Chengdu 610059, China
  • 收稿日期:2016-06-04 修回日期:2016-07-16 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: Hong Zhang, Guo-Hua Li E-mail:math_126@126.com;ligh_0906@126.com
  • 基金资助:
    Project supported by the Foundation for Young Key Teachers of Chengdu University of Technology, China (Grant No. KYGG201414) and the Opening Foundation of Geomathematics Key Laboratory of Sichuan Province, China (Grant No. scsxdz2013009).

Anomalous transport in fluid field with random waiting time depending on the preceding jump length

Hong Zhang(张红), Guo-Hua Li(李国华)   

  1. Department of Mathematics Teaching, Chengdu University of Technology, Chengdu 610059, China
  • Received:2016-06-04 Revised:2016-07-16 Online:2016-11-05 Published:2016-11-05
  • Contact: Hong Zhang, Guo-Hua Li E-mail:math_126@126.com;ligh_0906@126.com
  • Supported by:
    Project supported by the Foundation for Young Key Teachers of Chengdu University of Technology, China (Grant No. KYGG201414) and the Opening Foundation of Geomathematics Key Laboratory of Sichuan Province, China (Grant No. scsxdz2013009).

摘要: Anomalous (or non-Fickian) transport behaviors of particles have been widely observed in complex porous media. To capture the energy-dependent characteristics of non-Fickian transport of a particle in flow fields, in the present paper a generalized continuous time random walk model whose waiting time probability distribution depends on the preceding jump length is introduced, and the corresponding master equation in Fourier-Laplace space for the distribution of particles is derived. As examples, two generalized advection-dispersion equations for Gaussian distribution and lévy flight with the probability density function of waiting time being quadratic dependent on the preceding jump length are obtained by applying the derived master equation.

关键词: non-Fickian transport, continuous time random walk, advection-dispersion equation

Abstract: Anomalous (or non-Fickian) transport behaviors of particles have been widely observed in complex porous media. To capture the energy-dependent characteristics of non-Fickian transport of a particle in flow fields, in the present paper a generalized continuous time random walk model whose waiting time probability distribution depends on the preceding jump length is introduced, and the corresponding master equation in Fourier-Laplace space for the distribution of particles is derived. As examples, two generalized advection-dispersion equations for Gaussian distribution and lévy flight with the probability density function of waiting time being quadratic dependent on the preceding jump length are obtained by applying the derived master equation.

Key words: non-Fickian transport, continuous time random walk, advection-dispersion equation

中图分类号:  (Transport processes)

  • 05.60.-k
02.50.-r (Probability theory, stochastic processes, and statistics) 47.10.A- (Mathematical formulations)