calculation of a temperature profile for a film of liquid

Dear All,

I was calculating the temperature profile for a liquid film.

the film is simply the a layer of atoms which is periodic in x and y direction and the layer has an empty space above and below it along z-axis.

The temperature profile (attached below) has peaks at the upper and lower surfaces of the liquid film. I do not have any external fields and directed flows (drift) of atoms. This is why the peaks at the layer boundaries seem to me artificial and unnatural.

Could you please say if the “compute temp/profile” is designed for the calculation of the temperature profiles of the surfaces?

Just in case here is my input script:

units metal
dimension 3
atom_style atomic
boundary p p p
neighbor 2.0 bin

read_data data.dd

pair_style dd 4

pair_coeff 1 1 1 1

fix 1 all nve
velocity all create 235.0 4928459 rot yes dist gaussian
fix 2 all temp/rescale 100 235.0 235.0 10.0 1.0

timestep 0.001
thermo_style custom step pe ke etotal temp

Thermolize

thermo 10
run 2000001

compute tz all temp/profile 0 0 1 z 200 out bin
fix 5 all ave/time 10 600000 8000000 c_tz mode vector file temp_prof

Run a simulation

run 6000000

Many Thanks!

Anton

temperature_T235.eps (20.5 KB)

Dear All,

I was calculating the temperature profile for a liquid film.
the film is simply the a layer of atoms which is periodic in x and y
direction and the layer has an empty space above and below it along z-axis.

The temperature profile (attached below) has peaks at the upper and lower
surfaces of the liquid film. I do not have any external fields and directed
flows (drift) of atoms. This is why the peaks at the layer boundaries seem
to me artificial and unnatural.

really? atoms at the interface *are* more mobile and also temp/rescale
will not dissipate this (on the contrary).

Could you please say if the "compute temp/profile" is designed for the
calculation of the temperature profiles of the surfaces?

temp/profile doesn't care what your system is.