texpand shear() to setup stress-controlled shear experiments - sphere - GPU-bas… | |
git clone git://src.adamsgaard.dk/sphere | |
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--- | |
commit 51a9c589ead9a483532e430e76eae58cd49300e8 | |
parent 652a45877961f69687a5a30eb6542c7d75cd8c60 | |
Author: Anders Damsgaard <[email protected]> | |
Date: Wed, 14 Jan 2015 15:00:54 +0100 | |
expand shear() to setup stress-controlled shear experiments | |
Diffstat: | |
M python/sphere.py | 23 ++++++++++++++++------- | |
1 file changed, 16 insertions(+), 7 deletions(-) | |
--- | |
diff --git a/python/sphere.py b/python/sphere.py | |
t@@ -2704,15 +2704,19 @@ class sim: | |
for i in range(5): | |
self.adjustWall(idx=i) | |
- def shear(self, shear_strain_rate = 1.0): | |
+ def shear(self, shear_strain_rate = 1.0, shear_stress = False): | |
''' | |
- Setup shear experiment. The shear strain rate is the shear velocity | |
- divided by the initial height per second. The shear movement is along | |
- the positive x axis. The function zeroes the tangential wall viscosity | |
- (gamma_wt) and the wall friction coefficients (mu_ws, mu_wn). | |
+ Setup shear experiment either by a constant shear rate or a constant | |
+ shear stress. The shear strain rate is the shear velocity divided by | |
+ the initial height per second. The shear movement is along the positive | |
+ x axis. The function zeroes the tangential wall viscosity (gamma_wt) a… | |
+ the wall friction coefficients (mu_ws, mu_wn). | |
- :param shear_strain_rate: The shear strain rate to use. | |
+ :param shear_strain_rate: The shear strain rate [-] to use if | |
+ shear_stress isn't False. | |
:type shear_strain_rate: float | |
+ :param shear_stress: The shear stress value to use [Pa]. | |
+ :type shear_stress: float or bool | |
''' | |
self.nw[0] = 1 | |
t@@ -2754,7 +2758,12 @@ class sim: | |
self.angvel[I,0] = 0.0 | |
self.angvel[I,1] = 0.0 | |
self.angvel[I,2] = 0.0 | |
- self.vel[I,0] = (z_max-z_min)*shear_strain_rate | |
+ if shear_stress == False: | |
+ self.vel[I,0] = (z_max-z_min)*shear_strain_rate | |
+ else: | |
+ self.vel[I,0] = 0.0 | |
+ self.wmode[0] = 3 | |
+ self.w_tau_x[0] = float(shear_stress) | |
self.vel[I,1] = 0.0 # y-dim | |
self.color[I] = -1 | |