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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 22:34:31 +0000 (UTC)

Hi Kasra,

Actually, I use the "fix NVT" for the metallic walls with constant temperatures in order to make the wall's temperature constant and "fix NVE" for the argon flow. Any idea? 


On Wednesday, October 4, 2017 5:27 PM, Kasra F. Hesary <kasra.fattah@...24...> wrote:


Hi Santiago,
Are you using any thermostats to control the temperature?
Kasra.

On 10/04/2017 04:54 PM, Axel Kohlmeyer wrote:


On Wed, Oct 4, 2017 at 5:47 PM, m n via lammps-users <lammps-users@...76...ts.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.


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