high charged particle adsorption

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1

Hi dear lammps users
I have simulated a charged particle between tow parallel walls wich are not charged.
there is no electric fields or external forces or initial velocities in this simulation, but my charged particle has a motion towards the lower wall. I use dump custom to see my forces. There is a large negative force in the Z direction wich increases with the magnitude of the particles charge. there is similar behavior for positive or negative charge. (for example it is fz=-218 Kcal/moll.A for q=-55/+55 and -7.5 Kcal/moll.A for q=-10/+10)
So what is the reason?
Thanks alot

2

Hi dear lammps users
I have simulated a charged particle between tow parallel walls wich are not charged.
there is no electric fields or external forces or initial velocities in this simulation, but my charged particle has a motion towards the lower wall. I use dump custom to see my forces. There is a large negative force in the Z direction wich increases with the magnitude of the particles charge. there is similar behavior for positive or negative charge. (for example it is fz=-218 Kcal/moll.A for q=-55/+55 and -7.5 Kcal/moll.A for q=-10/+10)
So what is the reason?
Thanks alot

3

Could be many reasons. There is not enough
information in your post to say. Try to figure
out where the force contributions to your particles
are coming from.

Steve

4

Hi,

Does this mean that the force, -218 or -7.5, does not change sign with
opposite signs of charges? It seems you are getting a F=c*q^2, c=some
constant.

Is your system charge neutral? Which pair_style and/or kspace_style was used?