Dataset for: LES-Based Investigation of Hydrodynamic Transitions During Gravity Flow Expansion from Submarine Canyons

This dataset is organized as a set of time-series tables that systematically document the kinematic and dynamic evolution of the gravity current/turbidity current front under different cases (Case 2/5/8/10/A–G). In each case sheet, time denotes the output time; x/L0 is the dimensionless streamwise position normalized by the characteristic length L0​; (+x) and (+y) represent the front position (or the location of the extreme front) in the positive x and y directions, respectively; Velocity (+x) and Velocity (+y) are the corresponding front velocity components in the positive x and y directions; h_x and h_y denote the characteristic flow thicknesses near the front, which are typically used for non-dimensionalization and similarity analysis; reduced g is the reduced gravity, which quantifies the buoyancy forcing associated with the density contrast; and Fr_x and Fr_y are the Froude numbers calculated in the positive x and y directions, respectively​. In addition, the worksheet entitled “Run-out distance of LES and EXP” is used to compare the run-out distances obtained from large-eddy simulation (LES) and experimental measurements (EXP). In this sheet, the column names encode the case number (e.g., case5), the measurement direction (e.g., xmax, ymax, or ymin), and the data source (LES or EXP). Some columns are labeled as Unnamed:#DIV/0!, which is most likely caused by merged headers or blank header cells in Excel

本数据集以时序表格集的形式组织，系统记录了不同工况（工况2/5/8/10/A–G）下重力流/浊流前锋的运动学与动力学演化过程。在各工况工作表中，time代表输出时刻；x/L0为以特征长度L0归一化的无量纲顺流位置；(+x)与(+y)分别表示x、y正方向上的前锋位置（或极端前锋位置）；Velocity (+x)与Velocity (+y)为x、y正方向上对应的前锋速度分量；h_x与h_y为前锋附近的特征流动厚度，通常用于无量纲化处理与相似性分析；约化重力（reduced gravity）是表征密度差相关浮力驱动的物理量；Fr_x与Fr_y分别为x、y正方向上计算得到的弗劳德数（Froude number）。此外，名为“LES与EXP的传播距离”的工作表用于对比大涡模拟（large-eddy simulation, LES）与实验测量（experimental measurements, EXP）得到的传播距离。该工作表的列名编码了工况编号（如case5）、测量方向（如xmax、ymax或ymin）以及数据源（LES或EXP）。部分列标注为Unnamed:#DIV/0!，该现象大概率由Excel中的合并表头或空白表头单元格导致。