On 3/11/20 9:56 AM, Mohamed Abdelaal wrote:
I want to insert an atom with a velocity moving downwards toward the
graphene sheet in my box.
Yes I need to remove any atom moving away from my substrate or the
deposited atoms and far by 0.4 nm.
Then repeat the process until I have inserted 3000 atoms.

gmx insert-molecules has no knowledge of velocities, and atoms are not inserted with any velocity, only a position.

Removal of atoms is handled with gmx trjconv and a suitable index file generated by gmx select (in this case, since you're specifying a geometric criterion).

-Justin

Thanks for your reply.
Mohamed

On Wed, Mar 11, 2020 at 13:43 John Whittaker <
johnwhitt...@zedat.fu-berlin.de> wrote:

Write a script that calls gmx insert-molecules 3000 times and uses the
previous output as input for each call.


http://manual.gromacs.org/documentation/current/onlinehelp/gmx-insert-molecules.html

Is there something you have to do in between each insertion?

- John

Hello everybody,

I am trying to insert molecules into a box but I have to insert one
single
molecule at a time reaching 3000 molecule in total. Is there a way to
automate this process ?

Thanks
Mohamed
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