The data are saved in *.npy format which is a binary format, provided by
NumPy Python library. 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)