Pathlines in exclusion processes.

Pathlines in exclusion processes.
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DOI:
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发表时间:
2009
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
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通讯作者:
B. Hughes
B. Hughes
中科院分区:
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文献类型:
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作者:
M. Simpson;K. Landman;B. Hughes

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从随机行走过程的观察轨迹数据经常被用来表征宏观输运系数,并作出有关运动机制的推断。连续方程描述的平均时刻的位置的一个代理在排斥过程的推导和验证与模拟数据。与标准的非相互作用随机游动不同,排斥过程的矩方程明确表示了代理的相互作用,因为它们依赖于平均宏观代理密度。与连续方程的有效性和实验数据的解释相关的关键问题进行了讨论。
Trajectory data from observations of a random-walk process are often used to characterize macroscopic transport coefficients and to make inferences about motility mechanisms. Continuum equations describing the average moments of the position of an agent in an exclusion process are derived and validated with simulation data. Unlike standard noninteracting random walks, the moment equations for the exclusion process explicitly represent the interaction of agents since they depend on the averaged macroscopic agent density. Key issues associated with the validity of the continuum equations and interpretation of experimental data are discussed.