else: # nothing given
print("read_parts error: Invalid commandline arguments.")
print("Usage: ")
print(" ./read_parts.py <./path/to/sim/output> <start_time>")
print(" or")
print(" ./read_parts.py <./path/to/sim/output>")
sys.exit()
# initialize the reader
times = bbparts.init(data_dir)
# visit all outputted time values
for time in times:
# open the CGNS file for this particular output time
bbparts.open(time)
# read the CGNS file
t = bbparts.read_time()
n = bbparts.read_nparts()
(x, y, z) = bbparts.read_part_position()
(u, v, w) = bbparts.read_part_velocity()
print("time = ", time, "t =", t, "n =", n)
print(u)
sys.exit()
# close the CGNS file
bbparts.close()
nparts = bbparts.read_nparts()
bbparts.close()
# Init data arays
u = np.zeros((len(times), nparts))
v = np.zeros((len(times), nparts))
w = np.zeros((len(times), nparts))
t = np.zeros(len(times))
# Loop over time and pull data
for tt, time in enumerate(times):
bbparts.open(time)
t[tt] = bbparts.read_time()
(u[tt, :], v[tt, :], w[tt, :]) = bbparts.read_part_velocity()
#print(np.mean(u[tt,:]), np.mean(v[tt,:]), np.mean(w[tt,:]))
bbparts.close()
# Plot
fig = plt.figure()
ax1 = fig.add_subplot(311)
plt.plot(t, u)
plt.plot(t, np.mean(u, 1), 'ko-')
plt.xlabel("$t$")
plt.ylabel("$u$")
ax1 = fig.add_subplot(312)
nt = round(len(timeseries)/100) + 1 # close this output bb.close() # overwrite number of time outputs to read (for testing) #nt = 10 #t_end = 21 #################################################################### # store particle position data at initial time t_init #################################################################### timeseries = bb.init(ensemble[-1] + "/output")[int(timestart/DT_out):] bb.open(timeseries[0]) # using time step 0 for now (U_init, V_init, W_init) = bb.read_part_velocity() T_init = bb.read_time() np = len(U_init) # also store particle number bb.close() # create particle lists # current particle velocity U = numpy.zeros(np) V = numpy.zeros(np) W = numpy.zeros(np) # mean square displacements uCOR = numpy.zeros((nt,np)) vCOR = numpy.zeros((nt,np)) wCOR = numpy.zeros((nt,np)) # mean for each particle umean = numpy.zeros(np)
#!/usr/bin/env python
# bluebottle_particle_reader python module example code
import sys, getopt
import numpy as np
import bluebottle_particle_reader as bb
# initialize the reader
times = bb.init("/home/asiera/bluebottle/sim/output")
# visit all outputted time values
for time in times:
# open the CGNS file for this particular output time
bb.open(time)
# read the CGNS file
t = bb.read_time()
(x,y,z) = bb.read_part_position()
(u,v,w) = bb.read_part_velocity()
print("t =", t)
# close the CGNS file
bb.close()
tind = 0 # time index
# read all time outputs in timeseries
for time in timeseries:
# tell user where we are
#print("\rrealization", rcount, "of", len(ensemble), ": time =", time, "of",
# round(t_end, 2), "(" + str(round(percent)) + "%) ", end='')
print("realization", rcount, "of", len(ensemble), ": time =", time, "of",
round(t_end, 2), "(" + str(round(percent)) + "%) ")
sys.stdout.flush()
# open and process each time step in each realization
f = bb.open(time)
if f != None:
t = bb.read_time()
if t < t_end: # only read until reach end time of shortest simulation
[u, v, w] = bb.read_part_velocity()
U[tind] = U[tind] + bb.part_mean(u)
V[tind] = V[tind] + bb.part_mean(v)
W[tind] = W[tind] + bb.part_mean(w)
T[tind] = t
tind = tind + 1
bb.close()
else:
bb.close()
break
percent = percent + dpercent
# add an extra linebreak for better stdout
print()
# finish averaging
