Is the Temperature Distribution in Molecular Simulation Uniform?

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SUMMARY

The discussion centers on the temperature distribution in molecular simulations, specifically under conditions where two ends of the system are fixed at 300 K while the middle area is unconstrained. The observed temperature distribution along the X direction resembles a Gaussian distribution, raising questions about the uniformity of temperature in the middle area. Participants debate whether the temperature should indeed be uniform or if the Gaussian distribution is a natural outcome of the applied electrical field and system constraints.

PREREQUISITES
  • Molecular dynamics simulation principles
  • Understanding of temperature distribution in physical systems
  • Knowledge of Gaussian distribution in statistical mechanics
  • Familiarity with the effects of electric fields on molecular systems
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This discussion is beneficial for molecular simulation researchers, physicists studying thermodynamics, and anyone interested in the effects of external fields on temperature distribution in molecular systems.

only18922
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In molecular simulation, the two sides (X direction) of the simulating system has fixed temperature 300 k. The middle area is free to any constraint. Then we add a electrical field to the system along X direction. After some time steps,the temperature distribution along X direction looks like gauss distribution. The problem is,im my opinion,the temperature is supposed to distributed uniformly. Otherwise,we may need to make the wire we use smaller on two ends and bigger in the middle?
Anyway,can anybody explain the results?
 
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How can you have a uniform gradient when both ends are fixed at the same temperature?
 
By saying uniformly distributed, I mean the temperature in the middle area (free to MD run) is supposed to distributed uniformly. If u think it has to be Gauss type,why do u think so?
 

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