Dataset for 'Investigation of turbulent flow over irregular rough surfaces using direct numerical simulations'

This dataset is associated with the PhD thesis: Thakkar, M. (2017) Investigation of turbulent flow over irregular rough surfaces using direct numerical simulations (PhD Thesis), University of Southampton, Southampton, UKDataset description: each of the 17 folders comprises of five .csv files containing figure data from chapter 6 in the thesis. Files in each folder have the same naming convention with only the first few characters changing depending on the sample name. For example, folder s1 contains the following files. i) s1_Fig6p1.csv - consisting of data from Figure 6.1 (mean streamwise velocity profiles for the 17 rough surface samples). ii) s1_Fig6p2.csv - consisting of data from Figure 6.2 (mean streamwise velocity defect profiles for the 17 rough surface samples). iii) s1_Figs6p5-6p8-6p11-6p14.csv - consisting of data from Figures 6.5, 6.8, 6.11 and 6.14 (Reynolds streamwise, spanwise, wall-normal and shear stress profiles for the 17 rough surface samples). iv) s1_Fig6p17.csv - consisting of data from Figure 6.17 (TKE profiles for the 17 rough surface samples). v) s1_Figs6p19-6p23-6p26-6p30.csv - consisting of data from Figures 6.19, 6.23, 6.26 and 6.30 (dispersive streamwise, spanwise, wall-normal and shear stress profiles for the 17 rough surface samples). Folder s2 contains files s2_Fig6p1.csv, s2_Fig6p2.csv, s2_Figs6p5-6p8-6p11-6p14.csv, s2_Fig6p17.csv, s2_Figs6p19-6p23-6p26-6p30.csv, and so on for the remaining folders.For files containing data from more than one figure (for example, s1_Figs6p5-6p8-6p11-6p14.csv), the x-axis values of each plot are the same and are stored in the first column (titled 'z/delta') of the data matrix. Only the y-axis values differ depending on the relevant statistic and are stored in subsequent columns with appropriate titles.Some data may contain NaN or Inf values in their first and last few rows. These occur due to small errors during spatial averaging arising from the differences between fluid and solid regions of the computational domain. These values do not have a significant impact on the results and may be ignored.

本数据集关联于博士学位论文：Thakkar, M.（2017）《基于直接数值模拟（direct numerical simulations）的不规则粗糙表面湍流流动研究》（PhD Thesis），英国南安普顿大学，南安普顿。
数据集说明：本次数据集共包含17个文件夹，每个文件夹内均存有5个.csv格式文件，均提取自该论文第6章的绘图数据。各文件夹内的文件命名规则统一，仅文件名前缀部分根据对应样本的名称有所差异。
以文件夹s1为例，其包含如下5个文件：
1. s1_Fig6p1.csv：包含图6.1的相关数据（17个粗糙表面样本的时均流向速度剖面）。
2. s1_Fig6p2.csv：包含图6.2的相关数据（17个粗糙表面样本的时均流向速度亏损剖面）。
3. s1_Figs6p5-6p8-6p11-6p14.csv：包含图6.5、6.8、6.11与6.14的相关数据（17个粗糙表面样本的雷诺流向、展向、壁面法向及剪切应力剖面）。
4. s1_Fig6p17.csv：包含图6.17的相关数据（17个粗糙表面样本的湍动能（Turbulent Kinetic Energy, TKE）剖面）。
5. s1_Figs6p19-6p23-6p26-6p30.csv：包含图6.19、6.23、6.26与6.30的相关数据（17个粗糙表面样本的弥散流向、展向、壁面法向及剪切应力剖面）。
文件夹s2包含s2_Fig6p1.csv、s2_Fig6p2.csv、s2_Figs6p5-6p8-6p11-6p14.csv、s2_Fig6p17.csv与s2_Figs6p19-6p23-6p26-6p30.csv，其余文件夹的文件命名规则与此一致。
对于包含多幅绘图数据的文件（例如s1_Figs6p5-6p8-6p11-6p14.csv），各绘图的x轴数值均相同，存储于数据矩阵的第一列（列名为'z/delta'）；仅y轴数值因对应统计量不同而存在差异，存储于后续列并配有恰当的列标题。
部分数据的首尾若干行可能包含NaN（非数值）或Inf（无穷大）值，此类异常值源于计算域内流体与固体区域差异引发的空间平均过程中的微小误差，其对最终结果无显著影响，可忽略不计。