Re: [Yade-users] [Question #706005]: I am trying to create a simulation within yade with different sphere radius to fall by gravity into a container
Question #706005 on Yade changed: https://answers.launchpad.net/yade/+question/706005 gdfh5 posted a new comment: Usually, the smart TVs automatically update the applications in the background. So, we don’t need to update by ourselves.But, there are times when the updates are not updating automatically, and we need manual updating of apps.https://www.displaypick.com/how-to-update-apps- on-vizio-smart-tv/ -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #706005]: I am trying to create a simulation within yade with different sphere radius to fall by gravity into a container
Question #706005 on Yade changed: https://answers.launchpad.net/yade/+question/706005 Jan Stránský posted a new comment: If you have a new problem, please open a new question Cheers Jan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #706005]: I am trying to create a simulation within yade with different sphere radius to fall by gravity into a container
Question #706005 on Yade changed: https://answers.launchpad.net/yade/+question/706005 Status: Answered => Solved Huan confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #706005]: I am trying to create a simulation within yade with different sphere radius to fall by gravity into a container
Question #706005 on Yade changed:
https://answers.launchpad.net/yade/+question/706005
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> V packing and V cylinder are calculated as 0
> Why does the calculation is calculated as 0?
it is not computed as 0, it is just printed as 0.00
Change "{:.2f}" e.g. to "{:e}" or even just "{}" to see the actual value [1,3]
:.2f rounds the number to two decimal numbers, but the actual value is much
less, so 0.00 is printed, even if the number is not zero.
> Is there any guide on how to make the sphere pack better in the
container?
See gravity deposition tutorial [2]
> the simulation doesn't fully packed
> O.run(1000)
because it runs too little time (?)
Also consider using
###
O.run(1000,wait=True)
###
or
###
O.run(1000)
O.wait()
###
If you have a python code after O.run(1000), it is executed "immediately", i.e.
at a random time w.r.t. running simulation
Or go in the [3] style with checkUnbalanced-like stop condition.
A few not important notes:
> print("Number of spheres:", "{:.2f}".format(num_spheres))
"{:d}" makes much more sense for number (integer)
Also consider using f-strings [3]
> cylinder = yade.geom.facetCylinder(..., radius=0.06, ...)
> volume_cylinder = math.pi * 0.06**2 * 0.0605
you have repeated value 0.06
It is a good practice to make it a variable then
###
radius = 0.06
cylinder = yade.geom.facetCylinder(..., radius=radius, ...)
volume_cylinder = math.pi * radius**2 * 0.0605
###
This way, if you want to change the radius, you just change it in one place
(reducing the possible error by forgetting some place in the case where the
value is at multiple places).
Same for other repeated values (e.g. height)
Cheers
Jan
[1] https://docs.python.org/3/library/string.html#formatstrings
[2] https://yade-dem.org/doc/tutorial-examples.html#gravity-deposition
[3]
https://docs.python.org/3/tutorial/inputoutput.html#formatted-string-literals
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[Yade-users] [Question #706005]: I am trying to create a simulation within yade with different sphere radius to fall by gravity into a container
New question #706005 on Yade:
https://answers.launchpad.net/yade/+question/706005
import random
import math
from yade import geom, pack, plot
# create cylindrical body with radius 6 cm and height 6.05 cm
cylinder = yade.geom.facetCylinder((0,0,0), radius=0.06, height=0.065,
segmentsNumber=80, wallMask=6)
O.bodies.append(cylinder)
# create empty sphere packing
sp = pack.SpherePack()
# specify the radii and ratios
radii_ratios = [(0.75, 0.04), (0.0006, 0.06), (0.00236, 0.05), (0.00475,
0.35), (0.0095, 0.20), (0.0125, 0.30)]
# generate spheres with specified radii and ratios
for r, ratio in radii_ratios:
num_spheres = int(ratio * 1000)
sp.makeCloud((-0.055,-0.055,0.20), (0.055,0.055,0.09), rMean=r, rRelFuzz=0,
num=num_spheres)
# add the sphere pack to the simulation
sp.toSimulation()
O.engines = [ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(), Bo1_Facet_Aabb()]),
InteractionLoop(
# handle sphere+sphere and facet+sphere collisions
[Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys()],
[Law2_ScGeom_FrictPhys_CundallStrack()]
),
NewtonIntegrator(gravity=(0,0,-9.81), damping=0.4),
]
O.dt = 2 * PWaveTimeStep()
# run the simulation for 1000 steps
O.run(1000)
# calculate the volume of the packing
volume_packing = 0
num_spheres = 0
for b in O.bodies:
if isinstance(b.shape, yade.wrapper.Sphere):
volume_packing += 4/3 * math.pi * b.shape.radius**3
num_spheres += 1
# calculate the volume of the cylinder
volume_cylinder = math.pi * 0.06**2 * 0.0605
# calculate the porosity and porosity percentage
porosity = (volume_cylinder - volume_packing) / volume_cylinder
porosity_percent = porosity * 100
print("Number of spheres:", "{:.2f}".format(num_spheres))
print("V Packing:", "{:.2f}".format(volume_packing))
print("V Cylinder:", "{:.2f}".format(volume_cylinder))
print("Porosity:", "{:.2f}".format(porosity))
print("Porosity:", "{:.2f}%".format(porosity_percent))
I was able to complete the simulation but the simulation doesn't fully packed
and V packing and V cylinder are calculated as 0
Is there any guide on how to make the sphere pack better in the container?
Why does the calculation is calculated as 0?
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