Re: possibility of having particle with no (or minimize) interaction

[Ahmad Reza Motezakker]

Dear Rudolf,

Thank you very much for your answer.

Actually, I need the LJ repulsion to separate the particles enough (warm up). After warming up, I try to use exclusions function to remove the non-bonded interactions between the pairs but when I put system.part.exclusions in a loop I cannot remove all of them. It seems that the last index of the loop only works.

Best regards,

Ahm,ad Reza

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From: Rudolf Weeber <weeber@icp.uni-stuttgart.de>
Sent: Tuesday, May 17, 2022 5:26:05 PM
To: Ahmad Reza Motezakker
Cc: espressomd-users@nongnu.org
Subject: Re: possibility of having particle with no (or minimize) interaction

 

Hi Ahmad,
On Tue, May 17, 2022 at 02:49:29PM +0000, Ahmad Reza Motezakker wrote:
> I am wondering , is it possible to introduce particles in the system with no interaction? Or at lease setting LJ parameters in a way to minimize interactions?
Sure. Give them a type for which you have not defined any non-bonded interactions. That's all.

They still have inertia. If you don't want that, and want particles which follow the fluid motion exactly, use VirtualSitesInertialessTracers.


Regards, Rudolf

>
> I am using LBM thermostat and the aim is to have multiple free moving brownian particles without any interaction.
>
>
> Best regards,
>
> Ahmad Reza

--
Dr. Rudolf Weeber
Institute for Computational Physics
Universität Stuttgart
Allmandring 3
70569 Stuttgart
Germany
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Email: weeber@icp.uni-stuttgart.de
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