from evtk.hl import pointsToVTK 

import numpy as np  

npoints = 100  

x = np.random.rand(npoints)  

y = np.random.rand(npoints)  

z = np.random.rand(npoints)  

pressure = np.random.rand(npoints)  

temp = np.random.rand(npoints)  

pointsToVTK("./points", x, y, z, data = {"temp" : temp, "pressure" : pressure})