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Re: [lammps-users] Poisuille flow
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Re: [lammps-users] Poisuille flow


From: m n <mnnfean@...16...>
Date: Wed, 4 Oct 2017 22:18:40 +0000 (UTC)

Thanks Axel. That's totally right. Is there any other way to simulate a flow between parallel plates? In other words, is it more reasonable to use the "velocity flow set V_x 0.0 0.0" command in order to prevent from the continuous increase in temperature?


On Wednesday, October 4, 2017 4:54 PM, Axel Kohlmeyer <akohlmey@...24...> wrote:




On Wed, Oct 4, 2017 at 5:47 PM, m n via lammps-users <lammps-users@lists.sourceforge.net> wrote:
Dear LAMMPS users,

I am trying to simulate argon flow between two parallel metallic plates with different constant temperatures. In order to simulate the argon flow, I use the "fix ID group-ID addforce f_x 0.0 0.0" but after applying the force, the temperature of  flow region increases dramatically. When there is no force applied on the argon particles, the temperature is reasonable.

I would really appreciate if somebody could help me to figure out this issue.

‚Äčtrivial. the stronger the force you add, the more you accelerate your flowing particles, the more they heat up. simple as that.

axel.

 

Santiago

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Dr. Axel Kohlmeyer  akohlmey@...24...  http://goo.gl/1wk0
College of Science & Technology, Temple University, Philadelphia PA, USA
International Centre for Theoretical Physics, Trieste. Italy.