Question #230139 on Yade changed:
https://answers.launchpad.net/yade/+question/230139
Status: Answered => Open
Fu zuoguang is still having a problem:
Dear Christian Jakob and all users:
Long time no see and thanks for helping last time, I can do some
analysis with 2D clumps now buy at the same time find some problems with DOF
for those. Following my comprehension, all the centroids of spheres(particles)
should be at the same geometric surface during the entire time of simulation
but this is no in fact. So my all problems can be shown as that:
(1).After the clumps generation finishing, the state is just like that(the
beginning of my simulation):
http://i.imgur.com/ZgTCuhW.png
(2).My test simulation is compose of a large number of clumps and 4 fixed wall
and all clumps should getting a free falling since
they have contacts with the bottom wall or some other ones below them. If use
no function for DOF, the state of my finished tast is of course as that(this is
3D simulation):
http://i.imgur.com/ElBAWMJ.png
(3).After that above, I have another try for employing a function your
told me last time for DOF , which can be described as:
def DOF(): # of course, DOF condition only for 2D simulation
for b in O.bodies:
if b.isClump:
b.state.blockedDOFs = 'zXY'
and the state of my finished tast this time is of course as that:
http://i.imgur.com/h0LuITR.png
This can demonstrate obviously that this function does the positive effect for
DOF. But I also find that all the centroids of spheres are not in the same
plane by checking the status displayed by YADE just in Y-Z plane. It is as that:
http://i.imgur.com/q11ISgH.png
I think there is nothing wrong in what I just said above. But I am not
sure the reason of it and it could do harm for my simulation.
Seeking for your help!
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