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Re: [lammps-users] Question on Coulomb potential in LAMMPS
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Re: [lammps-users] Question on Coulomb potential in LAMMPS

From: Axel Kohlmeyer <akohlmey@...24...>
Date: Tue, 17 Oct 2017 19:53:19 -0400

On Tue, Oct 17, 2017 at 3:51 PM, A. M.M <alaa.murar@...24...> wrote:
> بسم الله الرحمن الرحيم
> Hello,
> I want to ask about the constant C ( energy conversation factor ) in Coulomb
> potential, does it contain e^2/4*pi*eps0 ?

the exact value of C depends on the choice of units.

> and hence the eps in the
> potential mean relative permittivity ?

yes. as indicated in the documentation, this epsilon represents the
property, that can be set with the "dielectric" command, which is 1.0
by default (i.e. vacuum permitivity, i.e. no assumed constant implicit
solvent screening).


> Thank you.
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Dr. Axel Kohlmeyer  akohlmey@...24...
College of Science & Technology, Temple University, Philadelphia PA, USA
International Centre for Theoretical Physics, Trieste. Italy.