Extremely persistent dense active fluids

We study the dynamics of dense three-dimensional systems of active particles for large persistence times τp at constant average self-propulsion force f. These systems are fluid counterparts of previously investigated extremely persistent systems, which in the large persistence time limit relax only on the time scale of τp. We find that many dynamic properties of the systems we study, such as the mean-squared velocity, the self-intermediate scattering function, and the shear-stress correlation function, become τp-independent in the large persistence time limit. In addition, the large τp limits of many dynamic properties, such as the mean-square velocity and the relaxation times of the scattering function, and the shear-stress correlation function, depend on f as power laws with non-trivial exponents. We conjecture that these systems constitute a new class of extremely persistent active systems.

, The data was obtained from running molecular dynamics simulations of active matter systems. The trajectories were stored and then post processed to obtain the needed information. , , # Data from: Extremely persistent dense active fluids

[https://doi.org/10.5061/dryad.xsj3tx9q4](https://doi.org/10.5061/dryad.xsj3tx9q4)

We have submitted the data derived from molecular dynamics simulations of active fluids appearing in the figures of the Soft Matter paper titled \"Extremely persistent dense active fluids\" by Grzegorz Szamel and Elijah Flenner. 

## Description of the data and file structure

The data is sorted and named by the figure that they appear in the paper. If there are a different number of points along the x-axis we divided the data into separate files. All the files are text files with the data appearing in the files ending in .dat. All the files are text files and can be read with any text editor. 

figure1.dat:  This file is divided into five blocks. The first line of each block is \"f=#\" where # is the average self propulsion force. There are two columns in each block. The first column is the persistence time and the second column is the average-square-ve...

我们研究了恒定平均自推进力（self-propulsion force）f下，大持久时间（persistence time）τ_p的三维高密度活性粒子（active particles）体系的动力学行为。该体系是此前研究的极高持久体系（extremely persistent systems）的流体对应物，这类体系在大持久时间极限下仅能以τ_p为时间尺度弛豫。我们发现，所研究体系的诸多动力学性质，例如均方速度（mean-squared velocity）、自中间散射函数（self-intermediate scattering function）以及剪切应力关联函数（shear-stress correlation function），在大持久时间极限下均与τ_p无关。此外，诸多动力学性质的大τ_p极限行为，例如均方速度、散射函数弛豫时间以及剪切应力关联函数，均以非平庸指数（non-trivial exponents）的幂律（power laws）形式依赖于f。我们推测，这类体系构成了一类新型的极高持久活性体系。

本数据集通过活性物质（active matter）体系的分子动力学模拟获取，轨迹经存储后进行后处理以提取所需信息。

# 数据来源：《极高持久致密活性流体》（Extremely persistent dense active fluids）
DOI: https://doi.org/10.5061/dryad.xsj3tx9q4

我们已提交来自《Soft Matter》期刊论文《极高持久致密活性流体》（作者为Grzegorz Szamel与Elijah Flenner）各配图中所用活性流体分子动力学模拟所得的全部数据。

## 数据与文件结构说明
本数据集按照其在论文中对应的图表进行排序与命名。若x轴方向的数据点数量存在差异，我们会将数据拆分至多个独立文件中。所有文件均为文本格式，扩展名为.dat，可通过任意文本编辑器直接读取。

figure1.dat：该文件分为五个数据块。每个数据块的首行格式为"f=#"，其中#代表平均自推进力的数值。每个数据块包含两列数据：第一列为持久时间τ_p，第二列为average-square-ve...