Partice Image Velocimetry (PIV) Measurements of the Velocity Field Behind the Truncated Cylinder

Three-dimensional, two-cameras particle image velocimetry snapshots of the velocity field behind the truncated cylinder at two horizontal sections (T,M). Instantaneous snapshots of the velocity field are saved in *.npy format which is a binary format, provided by NumPy Python library.
Naming convention:
TC25-8-SP-T - Truncated cylinder 25cm, 8m/s inflow velocity, Stereo PIV (SP), T - top section

The experiments are conducted in a windtunnel of TUHH.
The diameter d of the cylinder is 0.25m, the height of the cylinder l is 1m.
Data for three Reynolds numbers are published 6.4e+04, 1.28e+05, 2.41e+05.
The data are provided for two sections - at the middle and at the top of the cylinder


In order to read the data, following minimum example
can be used (python2.7):

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

xg,yg,ug,vg,wg = np.load(fname,allow_pickle=True)

uinf = 8
# plotting
plt.contour(yg/d,xg/d,ug/uinf,linewidths=0.5,colors='k')
plt.contourf(yg/d,xg/d,ug/uinf,15,cmap=plt.cm.jet)
plt.colorbar() # draw colorbar
plt.show()
plt.clf()

(fname is the file name, for example "1000.npy")
(xg,yg are the 2d coordinates in the measurement section)
(ug, vg, wg - velocity components from the PIV measurement)
(uinf is the inflow velocity)