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Re: [lammps-users] Cant assign two boundary conditions at lower and upper faces in change box
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Re: [lammps-users] Cant assign two boundary conditions at lower and upper faces in change box


From: Axel Kohlmeyer <akohlmey@...24...>
Date: Sat, 2 Dec 2017 08:18:12 -0500



On Sat, Dec 2, 2017 at 12:04 AM, Rajesh <creativeidleminds@...24...> wrote:
Dear lammps users,

I am trying to change th p p p to ps p p conditions using change box but getting error
both sides of boundary must be periodic. Although it is written in change box doc  that two conditions can be used for lower and upper face. Any idea why this happens?

​it happens because what you are asking for makes no sense at all.
when asking for periodic boundaries it is geometrically impossible to have anything but periodic boundaries on *both* sides of the box.

axel.

 


thanks.
Rajesh 

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--
Dr. Axel Kohlmeyer  akohlmey@...12...24...  http://goo.gl/1wk0
College of Science & Technology, Temple University, Philadelphia PA, USA
International Centre for Theoretical Physics, Trieste. Italy.