Dataset: Coarsening dynamics of 2D subaqueous dunes

This is a readme file providing a description of the experimental data from the manuscript of Jarvis et al. submitted to Journal of Geophysical Research: Solid Earth. The data provided in this directory is the evolving height of a sedimentary bed forced by a flow of water. The experiment takes place on a rotating table whilst a radially aligned camera captures a vertically thin section at a frequency of 200 Hz. The height of the bed in each image is recorded, along with the horizontal position of that point. More details can be found in the manuscript of Jarvis et al.

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List of files:

exp_list.csv = List of experiments including their experimental parameters.

experiment*.csv = Data recording the evolution of the bed profile with time for
each experiment (1-61).

exp_list.csv ####################################################################

This contains a list of the experiments along with the experimental parameters.
More details on the experiment configuration and the parameters can be found in
the manuscript of Jarvis et al. (submitted to JGR: Earth Surface).

The definitions of the columns are:

Experiment - The label of the experiment.

h /mm - Initial thickness of the sediment bed.

H /cm - Depth of water.

omega_b /s^-1 - Angular velocity of the rotating table.

omega_t /s^-1 - Angular velocity of the paddle assembly.

Omega /s^-1 - The relative angular velocity between the rotating table and paddle
assembly (omega_b - omega_t).

U /m s^-1 - The product of the table radius (0.97 m) and Omega.

r* - The ratio of the angular velocities of the rotating table and paddle
assembly |omega_t / omega_b|.

u* /m s^{-1} - The estimated friction velocity at the base of the bed

experiment*.csv #################################################################

There is one file per experiment recording the evolution of the bed profile with
time. Each line corresponds to one measurement of sediment height in the flume.
Each file contains 5 columns:

1) Index - This is the rotation number (starting from begining of experiment).

2) Position /mm - This is the location of the point in the flume.

3) Height /mm - This is the height of the sediment bed at this location.

4) Time /s - This is the time since the start of the experiment.

5) Frame - This is the frame number (starting from the first acquired frame)
from the recording which was used to make the measurement.

本说明文件用于阐释提交至《地球物理研究杂志：固体地球》（Journal of Geophysical Research: Solid Earth）的Jarvis等人论文所附带的实验数据。本目录所提供的数据为水流作用下沉积床的动态演化高度。实验在旋转台上开展，同时采用径向对齐相机以200赫兹的频率采集垂直薄层截面图像。每张图像中沉积床的高度及其对应测点的水平位置均被记录，更多细节可参见Jarvis等人的研究论文。
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文件清单：

exp_list.csv：包含所有实验及其实验参数的清单。

experiment*.csv：对应1至61号实验的床面形态随时间演化的记录数据。

exp_list.csv ####################################################################
该文件包含实验清单与对应实验参数，实验配置及参数的更多细节可参见Jarvis等人提交至《地球物理研究杂志：地球表面》（JGR: Earth Surface）的研究论文。

各列的含义如下：

Experiment：实验编号标签。

h /mm：沉积床初始厚度，单位：毫米。

H /cm：水深，单位：厘米。

ω_b /s⁻¹：旋转台的角速度。

ω_t /s⁻¹：搅拌桨组件的角速度。

Ω /s⁻¹：旋转台与搅拌桨组件之间的相对角速度，计算公式为ω_b - ω_t。

U /m·s⁻¹：旋转台半径（0.97 m）与Ω的乘积。

r*：旋转台与搅拌桨组件的角速度绝对值比值|ω_t / ω_b|。

u* /m·s⁻¹：沉积床底部的估算摩擦速度。
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每个实验对应一个数据文件，记录床面形态随时间的演化过程。文件中每一行对应水槽内一次沉积高度的测量数据，每个文件包含5列信息，具体如下：

1) Index：实验启动后的累计转数。

2) Position /mm：测点在水槽内的水平位置，单位：毫米。

3) Height /mm：该测点处沉积床的高度，单位：毫米。

4) Time /s：自实验启动以来的累计时长，单位：秒。

5) Frame：用于本次测量的录像帧编号，从首个采集帧开始计数。