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Re: [ESPResSo-users] randomness in Langevin thermostat

From: Mohammadreza Niknam Hamidabad
Subject: Re: [ESPResSo-users] randomness in Langevin thermostat
Date: Tue, 2 Jan 2018 00:40:02 +0330

Dear Henri,

Thank you so much.
I wish you the best things in this year.


On Tue, Jan 2, 2018 at 12:21 AM, Henri <address@hidden> wrote:
Hi Reza,

The random number generator can be seeded by setting the value "system.seed".

You can find out about it in the documentation.

The samples folder also has a minimal example of its usage.

Happy new year to you too!
Kind regards,

On Mon, 2018-01-01 at 23:16 +0330, Mohammadreza Niknam Hamidabad wrote:
> Hi all,
> I've got a confusing problem. I have a Langevin thermostat in my system and I put  particles in my
> simulation box. Every time I run for a 1000 time steps and print the position of a specific
> particle, I've got exact same X Y Z for that particle in all of my runs. So how can I simulate
> movement of a drop of ink in water (Diffusion)? 
> Is there any seed for randomness in Langevin?
> " system.thermostat.set_langevin(kT=1.2, gamma=1.0) "
> By the way happy new year.
> sincere,
> Reza

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