From: Brian Radak (bradak_at_anl.gov)
Date: Sun May 08 2016 - 11:04:31 CDT
How did you initialize velocities? The thermostat does not control
initial conditions.
Also, it's very hard to hold most systems at such low temperature -
normal dynamics should repartition potential energy into kinetic energy
very quickly.
I stopped heating from temperatures below 250 K or so a long time ago
because the system would often naturally heat up faster than my
increment (it's hard to say if your choice of 100 steps will overcome
this). I generally only use these kinds of protocols for annealing up to
600 K or so and then ramping down the temperature afterward.
HTH,
Brian
On 05/08/2016 10:27 AM, Dhiraj Srivastava wrote:
> Hi
> I am trying to gradually heat my system after minimization and
> using the following set of commands.
>
> reassignFreq 100
> reassignTemp 5
> reassignIncr 5
> reassignHold 310
>
>
> no where else in the entire configuration file i can see number 310.
> however after starting the calculation, system is going right away to
> 310 kelvin. I looked at previous post but could not find satisfactory
> answer. How can I resolved this issue?
>
> Thanks
> Dhiraj
-- Brian Radak Postdoctoral Appointee Leadership Computing Facility Argonne National Laboratory 9700 South Cass Avenue, Bldg. 240 Argonne, IL 60439-4854 (630) 252-8643 brian.radak_at_anl.gov
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