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Re: [ESPResSo-users] How to create a potential field?

From: Stefan Kesselheim
Subject: Re: [ESPResSo-users] How to create a potential field?
Date: Thu, 24 May 2012 07:39:21 +0200

Dear Joe,
currently this is "only" possible with the constraint command. I write only, 
just because a concept of spacial constraints and an external potential are 
different things, and should in my opinion be separated. Anyway, if you take 
the rod constraint it is the implementation of the log(r) potential that 
charged objects feel next to an infinitely long charged rod, that is 
proportional to the charge.
I although hidden behind the concept of constraint, this is what you mean.
It is not difficult to implement more "external potentials" (as I would call 
it) in a similar way. If you need assistance, just send a Mail.
Cheers and good luck,

On 24.05.2012, at 00:49, Joe wrote:

> Hi, 
> It doesn't matter what you call it, gravity, potential field or force field. 
> Is it possible to establish such a field, in which all the particles feel 
> forces which is proportional to their individual parameters, such as mass or 
> charge or something else?  
> Joe

Stefan Kesselheim
Institute for Computational Physics
University of Stuttgart

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