Data for: Numerical Investigation of Spatial and Temporal Structure of Annular Flow with Disturbance Waves

Entrainment and disturbance waves are simulated by VOF method. A systematic processing method is developed to accurately and efficiently calculate film thickness, which is the basis of calculation of wave parameter. By trying different values for the damping factor, B=20 is used since it could reasonably match the simulation with the experiment. This dataset shows the results obtained by B=20. Calculated film thickness is shown in two ways. One is z-t representation, which shows the result for each polar angle. These correspond to folders "z_t_raw" and "z_t_filtered", where "raw" denotes the original data, and "filtered" means a three-point median filter is used to remove fast droplets. In each folder, there are three subfolders which splits the 6s data evenly into three parts. The other way is theta-z representation where instantaneous film thickness distribution on the tube wall is shown for each saved time. A video, "B20.mp4", is made based on these figures. A FPS of 10 is used indicating that the video is 100 times slower than the real time.本研究采用流体体积法（VOF）对夹带波与扰动波开展数值模拟。为精准高效地计算作为波动参数计算核心基础的液膜厚度，本研究开发了一套系统化数据处理方法。通过对阻尼因子（damping factor）开展多组参数试算，最终选取B=20作为阻尼因子取值，该参数可使模拟结果与实验数据实现合理匹配。本数据集展示了采用B=20参数得到的全部模拟结果。计算得到的液膜厚度以两种形式呈现：其一为z-t分布图，用于展示各极角下的模拟结果，该类结果对应"z_t_raw"与"z_t_filtered"两个文件夹，其中"raw"代表原始数据，"filtered"代表采用三点中值滤波去除快速液滴后的处理后数据。上述每个文件夹下均包含3个子文件夹，将总时长6秒的原始数据均匀划分为3个分段。其二为theta-z分布图，用于展示各保存时刻下管壁表面的瞬时液膜厚度分布。基于上述theta-z分布图可生成视频文件"B20.mp4"，该视频采用10帧/秒（FPS）的帧率，播放速率较真实流动速率慢100倍。