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tperform relaxation without dynamic walls - sphere - GPU-based 3D discrete elem…
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---
commit 5c4f97d059e56e77b8455060aafacd54f2674c03
parent 292006e5d71f0d6cf10d53580aacf121dd0affab
Author: Anders Damsgaard <[email protected]>
Date: Thu, 19 Jun 2014 10:32:36 +0200
perform relaxation without dynamic walls
Diffstat:
M python/shortening.py | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)
---
diff --git a/python/shortening.py b/python/shortening.py
t@@ -40,7 +40,7 @@ Lx = dx*nx
Ly = dy*ny
Lz = dz*nz
-sim = sphere.sim('shortening', nw=1)
+sim = sphere.sim('shortening', nw=0)
# insert particles into each cube in 90 degree CCW rotated coordinate system
# around y
t@@ -67,34 +67,33 @@ print(sim.np[0])
## Relaxation
-# Choose the tangential contact model
-# 1) Visco-frictional (somewhat incorrect, fast computations)
-# 2) Elastic-viscous-frictional (more correct, slow computations in dense
-# packings)
-sim.contactmodel[0] = 2
# Add gravitational acceleration
# Flip geometry so the upper wall pushes downwards
+sim.g[0] = 0
sim.g[1] = -9.81
+sim.g[2] = 0
sim.periodicBoundariesX()
sim.uniaxialStrainRate(wvel = 0.0)
# Set duration of simulation, automatically determine timestep, etc.
-sim.initTemporal(total=3.0, file_dt = 0.1)
-
+sim.initTemporal(total=3.0, file_dt = 0.001)
sim.zeroKinematics()
+
sim.run(dry=True)
sim.run()
sim.writeVTKall()
+
## Shortening
+sim = sphere.sim('shortening', nw=1)
sim.readlast()
sim.initTemporal(current=0.0, total=5.0, file_dt = 0.01)
# push down upper wall
compressional_strain = 0.5
-sim.uniaxialStrainRate(wvel = compressional_strain*Lx/sim.time_total[0])
+sim.uniaxialStrainRate(wvel = -compressional_strain*Lx/sim.time_total[0])
sim.run(dry=True)
sim.run()
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