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-rw-r--r--ldc_3d.py37
1 files changed, 26 insertions, 11 deletions
diff --git a/ldc_3d.py b/ldc_3d.py
index a8660a3..e059b31 100644
--- a/ldc_3d.py
+++ b/ldc_3d.py
@@ -10,34 +10,48 @@ from symbolic.generator import LBM
import symbolic.D3Q19 as D3Q19
+from evtk.hl import imageToVTK
+
def MLUPS(cells, steps, time):
return cells * steps / time * 1e-6
+def export_vtk(lattice, moments):
+ for i, m in enumerate(moments):
+ print("Export VTK file %d of %d." % (i+1, len(moments)))
+
+ imageToVTK("result/ldc_3d_%03d" % i, cellData = {
+ 'velocity_x': m[1,:].reshape(lattice.geometry.size(), order = 'F'),
+ 'velocity_y': m[2,:].reshape(lattice.geometry.size(), order = 'F'),
+ 'velocity_z': m[3,:].reshape(lattice.geometry.size(), order = 'F')
+ })
+
def generate_moment_plots(lattice, moments):
for i, m in enumerate(moments):
print("Generating plot %d of %d." % (i+1, len(moments)))
velocity = numpy.ndarray(shape=tuple(reversed(lattice.geometry.inner_size())))
- # plot x-z-plane
+ # extract x-z-plane
y = lattice.geometry.size_y//2
for z, x in numpy.ndindex(lattice.geometry.size_z-2, lattice.geometry.size_x-2):
gid = lattice.gid(x+1,y,z+1)
velocity[z,y,x] = numpy.sqrt(m[1,gid]**2 + m[2,gid]**2 + m[3,gid]**2)
- plt.figure(figsize=(20, 10))
-
- plt.subplot(1, 2, 1)
- plt.imshow(velocity[:,y,:], origin='lower', vmin=0.0, vmax=0.12, cmap=plt.get_cmap('seismic'))
-
- # plot y-z-plane
+ # extract y-z-plane
x = lattice.geometry.size_x//2
for z, y in numpy.ndindex(lattice.geometry.size_z-2, lattice.geometry.size_y-2):
gid = lattice.gid(x,y+1,z+1)
velocity[z,y,x] = numpy.sqrt(m[1,gid]**2 + m[2,gid]**2 + m[3,gid]**2)
+ plt.figure(figsize=(20, 10))
+
+ # plot x-z-plane
+ plt.subplot(1, 2, 1)
+ plt.imshow(velocity[:,y,:], origin='lower', vmin=0.0, vmax=0.15, cmap=plt.get_cmap('seismic'))
+
+ # plot y-z-plane
plt.subplot(1, 2, 2)
- plt.imshow(velocity[:,:,x], origin='lower', vmin=0.0, vmax=0.175, cmap=plt.get_cmap('seismic'))
+ plt.imshow(velocity[:,:,x], origin='lower', vmin=0.0, vmax=0.15, cmap=plt.get_cmap('seismic'))
plt.savefig("result/ldc_3d_%02d.png" % i, bbox_inches='tight', pad_inches=0)
@@ -62,8 +76,8 @@ boundary = """
}
"""
-nUpdates = 40000
-nStat = 250
+nUpdates = 10000
+nStat = 1000
moments = []
@@ -76,7 +90,7 @@ lattice = Lattice(
geometry = Geometry(128, 128, 128),
moments = lbm.moments(optimize = False),
- collide = lbm.bgk(f_eq = lbm.equilibrium(), tau = 0.52),
+ collide = lbm.bgk(f_eq = lbm.equilibrium(), tau = 0.56),
boundary_src = boundary)
@@ -97,4 +111,5 @@ for i in range(1,nUpdates+1):
print("\nConcluded simulation.\n")
+#export_vtk(lattice, moments)
generate_moment_plots(lattice, moments)