>
> Thanks for the updated script, I am using it to see how it works. Give
> me a try with the TranslationEngine, I will tell you if I need your
> help.. ;)
Good. The key to simplicity is to inherit from TranslationEngine and
call its own ::action to do the work from the new engine (like
Dear all,
I am pleased to announce the official launch of www.liggghts.com /
www.cfdem.com along with the release of the Open Source Discrete Element
Particle Simulator LIGGGHTS, version 1.0.
LIGGGHTS stands for LAMMPS Improved for General Granular and Granular Heat
Transfer Simulations. As this
On 23 April 2010 16:12, chiara modenese wrote:
>
>
> 2010/4/23 Václav Šmilauer
>
>> I updated scripts/test/interpolating-force.py so that it shows something
>> meaningful.
>>
> Hi Vaclav,
> I see that in InterpolatingDirectedForceEngine we define our force as a
> function of time within _times_
Yes Bruno, this would be lovely (and perhaps simple to do). Can we
(you) do that? Do we already have a sort of DOFs for velocities
exactly as for generalized displacements?
Apparently, it is already implemented that way. NewtonIntegrator.cpp:182 :
blockTranslateDOFs(state->blockedDOFs, st
2010/4/23 Václav Šmilauer
> I updated scripts/test/interpolating-force.py so that it shows something
> meaningful.
>
Hi Vaclav,
I see that in InterpolatingDirectedForceEngine we define our force as a
function of time within _times_ variable range.
If the variable _wrap_ is set to true, I see we r
2010/4/23 Václav Šmilauer
> Hi Chia,
>
> there is
>
> https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.InterpolatingDirectedForceEnginewhich
> you might consider. Implementing analogous
> InterpolatingTranslationEngine would be trivial, you can try that; or I can
> do it if you nee
On 23 April 2010 14:06, Bruno Chareyre wrote:
> A logic I found very efficient for this problem (perhaps already possible
> in Yade?) is the one of PFC :
> You can declare some DOF's fixed for velocities/spins (say, Vx is declared
> fixed).
> After that, if you set Vx=0, the body doesn't move. If
A logic I found very efficient for this problem (perhaps already
possible in Yade?) is the one of PFC :
You can declare some DOF's fixed for velocities/spins (say, Vx is
declared fixed).
After that, if you set Vx=0, the body doesn't move. If you set
Vx=something, it will move at constant Vx.
If
> Ok, thanks a lot. But how is it that with TranslationEngine doesn't
> work? I mean it doesn't because we account for the displacement twice?
> I am looking at the code right now but I cannot find out why..
TranslationEngine will work for dynamic bodies, as it only sets
velocity, nothing else. I
2010/4/23 Václav Šmilauer
>
> >
> > Using ScGeom, being the bodies Dynamic and using JumpChangeSe3 should
> > work?
> > Well let's try again.. I will let you know..
>
> Make sure you set
>
> https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.JumpChangeSe3.setVelocitiesto
> true (it i
I updated scripts/test/interpolating-force.py so that it shows something
meaningful.
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>
> Using ScGeom, being the bodies Dynamic and using JumpChangeSe3 should
> work?
> Well let's try again.. I will let you know..
Make sure you set
https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.JumpChangeSe3.setVelocities
to true (it is false by default), then it will work. See
2010/4/23 Václav Šmilauer
>
> > Reading JumpChangeSe3 (wouldn't it be better to call it
> > StepChangeSe3,
> > or rather StepChange... something else?) code, positions are
> > updated "by
> > hand"
> >
> > if(!setVelocities || (setVelocities && !b-
> Reading JumpChangeSe3 (wouldn't it be better to call it
> StepChangeSe3,
> or rather StepChange... something else?) code, positions are
> updated "by
> hand"
>
> if(!setVelocities || (setVelocities && !b->isDynamic))
>
>
Hi Chia,
there is
https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.InterpolatingDirectedForceEngine
which you might consider. Implementing analogous
InterpolatingTranslationEngine would be trivial, you can try that; or I can do
it if you need :-)
Cheers, v.
> Hi all,
>
> how ca
2010/4/19 Václav Šmilauer
>
> >
> > Yes, I confirm (by myself :-) ) that doing so we account for the
> > applied displacement twice. Actually this fact is already documented
> > and avoid in JumpChangeSe3 class. Maybe we can add a comment also in
> > TranslationEngine so that if one wants to use
Hi all,
how can I impose a force (or better a displacement) changing over time in
the simulation (let's say increasing/decreasing)? PyPeriodicRunner? Any
examples already done in Yade?
cheers, Chiara
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