Experimental data set of peristaltic flow in an annular channel

These files contain processed data from a PTV experiment of peristaltic flow in an annular channel shorter than the peristaltic wavelength, and code files for further analysis and plotting. This data is reported and presented in the paper 'Peristaltic pumping in short annular geometries: An experimental approach for studying Glymphatic flow' (https://arxiv.org/abs/2605.28350). ****************************************************************************File name: 'net_velocity_data.csv'This data set contains the processed data of particles trajectories and net velocities in a peristaltic flow through a short annular tube. The particles were tracked using a PTV method and Trackpy python library.The columns are:1 - particle: The unique particle ID.2 - x_start: The initial x coordinate of the particle in [px].3 - x_end: The final x coordinate of the particle in [px].4 - y_start: The initial y coordinate of the particle in [px].5 - y_end: The final y coordinate of the particle in [px].6 - pressure_kpa: The pressure of the pulse waves applied through the internal compliant tube in [kPa].7 - dt: The time difference between the first and last frame in which the particle was detected in [sec].8 - dx_pixel: The total distance the particle traveled in the x direction in [px].9 - dy_pixel: The total distance the particle traveled in the y direction in [px].10 - dx_pixel: The total distance the particle traveled in the x direction in [mm].11 - dy_pixel: The total distance the particle traveled in the y direction in [mm].12 - xvelocity_pixel: The net velocity of the particle in the x direction in [px/sec].13 - yvelocity_pixel: The net velocity of the particle in the y direction in [px/sec].14 - xvelocity_mm: The net velocity of the particle in the x direction in [mm/sec].15 - yvelocity_mm: The net velocity of the particle in the y direction in [mm/sec].16 - location: The section of the annular tube cross-section where the particle is located, either 'top' or 'bottom'.17 - dist_from_tube: The initial y-distance between the particle to the nearest boundary of the compliant tube in [px].18 - norm_dist: The normalized 'dist_from_tube' (\tilde(r)).19 - norm_amp: The normalized amplitude (\alpha).**************************************************************************** ****************************************************************************File name: 'instant_velocity_data.csv'This data set contains the processed data of particles trajectories and instantaneous velocities in a peristaltic flow through a short annular tube. The particles were tracked using a PTV method and Trackpy python library.The columns are:1 - particle: The unique particle ID.2 - frame: The number in which the particle was detected.3 - y: The y coordinate of the particle.4 - x: The x coordinate of the particle.5 - xvelocity_pixel: The instant velocity of the particle in the x direction in [px/sec].6 - yvelocity_pixel: The instant velocity of the particle in the y direction in [px/sec].7 - xvelocity_pixel: The instant velocity of the particle in the x direction in [mm/sec].8 - yvelocity_pixel: The instant velocity of the particle in the y direction in [mm/sec].9 - pressure_kpa: The pressure of the pulse waves applied through the internal compliant tube in [kPa].10 - norm_dist: The initial y-distance between the particle to the nearest boundary of the compliant tube (\tilde(r)).11 - location: The section of the annular tube cross-section where the particle is located, either 'top' or 'bottom'.**************************************************************************** ****************************************************************************File name: 'Velocity_Analysis.ipynb'A jupyter-notebook file with the code used to generate the graphs of the instantaneous and net velocities. File name: 'Helper_Functions.py'A Python file with helper functions for 'Velocity_Analysis.ipynb'.****************************************************************************