using single and multisphere together

Submitted by RobertG on Mon, 07/25/2016 - 17:22

Hello,
for a simulation, which uses spherical and non spherical particles,
I want to use a singelesphere and a multisphere approach at the same time.
But it does not work.
Every time, when "fix multisphere" starts, all of the existing singlespheres are deleted.
When the multisphere starts first, the simulation crushes shortly after the singlespheres are inserted,
saying
ERROR on proc 0: Too many neighbor bins (../neighbor.cpp:1778)
In both cases, the singlespheres and multispheres are seperated in two different groups and
I use the fix nve/sphere solver for the singlespheres and the fix multisphere solver for the multispheres.

I hope some one can tell me, if it is possible to use the singlesphere approach and the multisphere approach at the same time.

Best regards
Robert Grandl

Forums:

ckloss's picture

ckloss | Tue, 07/26/2016 - 00:05

Hi Robert ,

you need two different integrators: a fix nve/sphere and a fix multisphere. They should operate on different groups, e.g. defined by assigning different groups to the insertion commands inserting spheres and multispheres

Christoph

RobertG | Tue, 07/26/2016 - 11:23

Thanks a lot Christoph,
in deed, I used already the method you descried. Some how the timestep was to big.
Now it works, when the multispheres are started first.
But is there a method, which allows me, to load the singlecore data, position an so on?

Best regards
RobertG

govind | Thu, 09/28/2017 - 13:25

I am working on particle simulation in which I am using multisphere and sphere both. To generate a sphere I use create atoms command and to set properties "set" command. But on run
it throws an error : set does not work with multisphere. I am using different group for both sphere and multispher as well integrators.

Govind