Question #704090 on Yade changed:
https://answers.launchpad.net/yade/+question/704090
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
TLTR: basically you cannot "blindly" copy-paste pieces of code and
expect them to work as you want.
please provide a MWE [1].
M = minimal, e.g. deleted commented parts of code (which is otherwise only
confusing)
basically, in [2] (please link directly related questions) the provided MWE is
the approach
- run something: O.step() or O.run(N,True)
- do something: O.cell.velGrad = ...
You are here using PyRunner. You then have to use completely different approach.
In PyRunner, first of all, do not use O.step() inside the "command" function.
Rather assign O.cell.velGrad based e.g. on O.iter or some similar condition.
E.g.
###
O.engines = [
...
PyRunner(iterPeriod=1,command="checkStress()", ...), # iterPeriod=1 (!!!)
]
def checkStress(): # checkStress name for function setting velGrad ???
if O.iter == 1000:
O.cell.velGrad = someValue1
if O.iter == 2000:
O.cell.velGrad = someValue2
...
###
Or you can use virtPeriod and use some counter, "remembering" which cycle it is
in etc.
Or ... many options
a side note: do not use realPeriod for serious simulations
Cheers
Jan
[1] https://www.yade-dem.org/wiki/Howtoask
[2] https://answers.launchpad.net/yade/+question/703791
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