# README ## Dataset Title Bubble dynamics data for oscillating gas flow as inlet to a quasi(pseudo) 2D fluidized beds. ## Description This dataset contains 35 comma-separated values (CSV) files, each representing a unique gas flow condition with a sinusoidal modulation around a specific mean operating velocity. The sinusoidal flow profiles use five amplitude values: 0.0, 0.25, 0.5, 0.75, and 1.0. For each amplitude, the mean gas flow velocities are set to seven discrete values: 12.8, 16.0, 19.2, 25.6, 32.0, 38.4, and 44.8 liters per minute (L/min). These values are selected as integer multiples of the experimentally determined minimum fluidization velocity, which is 12.8 L/min. Each file is named using the following format: VXX_AmpY.Y_umfZ.Z Where:- VXX indicates the video number (e.g., V01 for video 1)- AmpY.Y refers to the amplitude of the sinusoidal flow modulation (e.g., Amp0.25 for 0.25 amplitude)- umfZ.Z represents the multiple of the minimum fluidization velocity used as the mean flow rate (e.g., umf2.0 means 2.0 × 12.8 L/min) For example, the filename "V01_Amp0.0_umf1.0" refers to video 1, with an amplitude of 0.0 and a mean gas flow rate equal to 12.8 L/min. The dataset is structured so that:- The first 7 videos represent the 7 mean velocities at an amplitude of 0.0- The next 7 videos correspond to the same 7 velocities at an amplitude of 0.25- This pattern continues through all five amplitude levels This results in a total of 5 amplitudes × 7 velocities = 35 distinct flow conditions. The table table below provides the valve settings and calculated operating velocities used to produce each oscillating gas flow profile. | Video Name | Amplitude | Operating Velocity | Valve 1 & 5 | Valve 2 & 4 | Valve 3 ||------------|-----------|--------------------|-------------|-------------|---------|| V01 | 0 | 12.8 | 12.8 | 12.8 | 12.8 || V02 | 0 | 16.0 | 16.0 | 16.0 | 16.0 || V03 | 0 | 19.2 | 19.2 | 19.2 | 19.2 || V04 | 0 | 25.6 | 25.6 | 25.6 | 25.6 || V05 | 0 | 32.0 | 32.0 | 32.0 | 32.0 || V06 | 0 | 38.4 | 38.4 | 38.4 | 38.4 || V07 | 0 | 44.8 | 44.8 | 44.8 | 44.8 || V08 | 0.25 | 12.8 | 10.2 | 13.8 | 16.0 || V09 | 0.25 | 16.0 | 12.7 | 17.3 | 20.0 || V10 | 0.25 | 19.2 | 15.3 | 20.7 | 24.0 || V11 | 0.25 | 25.6 | 20.4 | 27.6 | 32.0 || V12 | 0.25 | 32.0 | 25.5 | 34.5 | 40.0 || V13 | 0.25 | 38.4 | 30.6 | 41.4 | 48.0 || V14 | 0.25 | 44.8 | 35.7 | 48.3 | 56.0 || V15 | 0.5 | 12.8 | 7.6 | 14.8 | 19.2 || V16 | 0.5 | 16.0 | 9.5 | 18.5 | 24.0 || V17 | 0.5 | 19.2 | 11.4 | 22.2 | 28.8 || V18 | 0.5 | 25.6 | 15.2 | 29.6 | 38.4 || V19 | 0.5 | 32.0 | 18.9 | 37.0 | 48.0 || V20 | 0.5 | 38.4 | 22.7 | 44.4 | 57.6 || V21 | 0.5 | 44.8 | 26.5 | 51.8 | 67.2 || V22 | 0.75 | 12.8 | 5.0 | 15.8 | 22.4 || V23 | 0.75 | 16.0 | 6.2 | 19.8 | 28.0 || V24 | 0.75 | 19.2 | 7.4 | 23.7 | 33.6 || V25 | 0.75 | 25.6 | 9.9 | 31.6 | 44.8 || V26 | 0.75 | 32.0 | 12.4 | 39.5 | 56.0 || V27 | 0.75 | 38.4 | 14.9 | 47.4 | 67.2 || V28 | 0.75 | 44.8 | 17.4 | 55.3 | 78.4 || V29 | 1.0 | 12.8 | 2.4 | 16.8 | 25.6 || V30 | 1.0 | 16.0 | 2.9 | 21.0 | 32.0 || V31 | 1.0 | 19.2 | 3.5 | 25.2 | 38.4 || V32 | 1.0 | 25.6 | 4.7 | 33.6 | 51.2 || V33 | 1.0 | 32.0 | 5.9 | 42.0 | 64.0 || V34 | 1.0 | 38.4 | 7.1 | 50.4 | 76.8 || V35 | 1.0 | 44.8 | 8.2 | 58.8 | 89.6 | Each recorded video captures one minute of operation of the fluidized bed, with a frame rate of 50 fps. The files are in CSV format. The data represented in each column is as follows: 1. video_name: Video data used to generate the numerical data 2. frame_number: Activity capture at a particular frame 3. time[sec]: Time of recording the activity in the bed 4. num_contours_per_frame: Number of bubbles detected for a particular frame 5. ID: Individual ID for each bubble at a frame 6. cx_pos[px]: Bubble position in x direction in pixels 7. cx_pos[m]: Bubble position in x direction in meters relative to the fluidized beds 8. cy_pos[px]: Bubble position in y direction in pixels 9. cy_pos[m]: Bubble position in y direction in meters relative to the fluidized beds10. size[px^2]: Bubble size in pixels11. size[m^2]: Bubble size in meters relative to the fluidized beds12. perimeter[px]: Bubble perimeter in pixels13. perimeter[m]: Bubble perimeter in meters relative to the fluidized beds14. approx_diameter[px]: Approximated diameter of bubble in pixels15. approx_diameter[m]: Approximated diameter of bubble in meters relative to the fluidized beds16. x_velocity[m/s]: Bubble velocity in x direction17. y_velcoity[m/s]: Bubble velocity in y direction 18: valve* : Last five columns represent individual valve velocities in L/min ## Data Format The data format is CSV This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), SPP 2364, project number 504548777.