WARNING: Atom style hybrid defines both, per-type and per-atom masses

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1

Hello sir,
i implemented a code for many particles system, but i always have this warning.
units lj
dimension 2
boundary p p p
atom_style hybrid charge sphere
WARNING: Atom style hybrid defines both, per-type and per-atom masses; both must be set, but only per-atom masses will be used (src/atom_vec_hybrid.cpp:133)

I made changes according to the warning but the same result again. My code is running and shows effects according to changes in the mass parameter. what should i do?

region box block 0 36 0 36 0 1.0
create_box 2 box

region subtrate block 0 36 0 36 0 1.0 units box
lattice hex 0.212 origin 0.1 0.1 0.0
create_atoms 1 region subtrate
group substrate type 1
set group substrate diameter 1.0
#set group substrate density/disc 0.3

region mob block 0 36 0 36 0 1.0 units box
create_atoms 2 random 4000 12345 NULL overlap 0.3 maxtry 50
group mobile type 2
set group mobile diameter 1.0
#set group mobile density/disc 0.3

set type 2 charge 0.3
# Per Atom mass
set type 1 mass 1.0
set type 2 mass 1.0
# Per Atom Type mass
mass 1 1.0
mass 2 1.0

2

Hi @zahidk9,

Since you’re using an hybrid style of particles you’ll get the warning message no matter what since finite-size particles (here style sphere) need a per-atom mass anyway. This is in conflict with most other atom_style including charge. See the documentation on the atom_style command.

The warning message is not an error. It is just a warning telling you which masses will be used in the simulation.

1 Like
3

Thanks sir