Hi Everyone
While running my program, after some timesteps, the particles tend to move away from the outer areas as shown in figures. why is it that I am not getting a good composition?
Also the particles are not settling down properly. What should I do about that?
I am attaching my input file also
Regards
Hari
| Attachment | Size |
|---|---|
 d2.png | 393.75 KB |
| d3.png | 348.16 KB |
| d4.png | 312.68 KB |
 in.insert_hundred_cycles.pdf | 27.92 KB |
Daniel Queteschiner | Mon, 08/17/2015 - 12:01
A couple of things
Looking at the scale of your setup I suggest using cgs units instead of si.
Your Young's modulus is pretty high. A lower Young's modulus (~5e7) will basically give you the same results but allows for larger time steps.
I'd rather use a discrete set of particletemplate/sphere fixes instead of the uniform radius option which has not been tested thoroughly afaik.
Last but not least you should use the
all_in yesoption for your insert/pack to avoid overlaps with the cylinder wall.dhari27 | Mon, 08/17/2015 - 16:00
Thanks Daniel for your quick
Thanks Daniel for your quick reply. I added the all_in yes condition to the insert/pack command and the particles have occupied the whole area of the region and not the center.
I have another doubt regarding young's modulus value. Will the changing of young's modulus value from the given one to ~5e7 affect the material contact or interaction and also settling inside the container other than computational accuracy?
The value which I provided in the simulation is the correct value corresponding to the material I am using. Iam currently simulating lot of time steps and the particles are not settling properly.
What amount of steps should I run to properly settle according to time step mentioned in the input file.
Regards
Hari
RAJ KASHYAP | Fri, 09/25/2015 - 14:23
HOW TO DECIDE COHESION DENSITY
Hey sir,
I am using cgs units and material youngs modulus is in the range e11 .Also the cohesion energy density for this should be in the what range.Is reducing the youngs modulus to e7 reduces our simulation accuracy.
Thanks in advance
Raj