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Re: [lammps-users] output velocity of a group of particles
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Re: [lammps-users] output velocity of a group of particles

From: Stefan Paquay <stefanpaquay@...24...>
Date: Wed, 15 Nov 2017 17:21:14 -0500

That depends on whether you want the time-averaged velocity of the center of mass or not.

On Wed, Nov 15, 2017 at 5:12 PM, m n <mnnfean@...1209......> wrote:
If I use "compute chunk/atom" + "compute vcm/chunk" + "fix ave/time", is that right?

On Wednesday, November 15, 2017, 12:11:24 PM CST, Stefan Paquay <stefanpaquay@...24...> wrote:

I think using compute/chunk and fix ave/chunk will be much more handy than 20 groups for this purpose...

On Wed, Nov 15, 2017 at 12:58 PM, m n via lammps-users <> wrote:
Deas Lammps users,

I am trying to simulate a liquid flow between two parallel solid walls. I have created 20 different groups for the flow region in the y direction (normal to the flow direction). How can I output the time-averaged velocity of each group?

Many thanks in advance for any help,

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