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Re: [lammps-users] Calculation density of water in nanotube

# Re: [lammps-users] Calculation density of water in nanotube

 From: Julien Guénolé Date: Mon, 6 Nov 2017 15:45:12 +0100

```First of all, as you described you issues, they are not Lammps related
but rather physics/scientific problems. Your colleagues/supervisor are
better positionned to address them.

On 06/11/17 14:36, Zohreh Ahadi wrote:
> Dear all,
> I would like to calculate the  density of water in nanotubes when the
> temperature of them are changed,
> in order to calculation of density I used the (mass of water)/volume
> inside of  Nanotube, but when the water convert to ice again I reach
> to the same density!!, 1_ how can I fix this problem?
Not enough information (type and succession of simulations, exact
procedure,...) to know from where you "problem" comes.
> 2_ how I can calculate only the volume of water group in nanotubes?
If it is "inside" the NT (e.g. no interface water/vacuum), using a
Voronoi approach might be relevant.
>  3_ is it possible I calculated the radial density of water in
> nanotubes which the center of Nanotube be the origin?
yes. But keep in mind that a density is a volume averaged quantity. So a
minimum volume has to be considered to make it consistent.
>
> Regards,
>
Regards,

--
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Dr. Julien GUÉNOLÉ
Postdoctoral researcher
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