total energy for calculate melting point

I want to calculate the melting point for tip4p.with plot of energy versus time

  1. I have used this paper (The melting point of ice Ih for common water models calculated from direct coexistence of the solid-liquid interface) for comparing the results.there is a big difference between total energies. I did not see jump in energy at temp of melting or freezing . Energy decreases and becomes constant at each temperature.

can you help me with this problem?

my input was attached

inwi.in (2.37 KB)

I want to calculate the melting point for tip4p.with plot of energy
versus time
1) I have used this paper (The melting point of ice Ih for common water
models calculated from direct coexistence of the solid-liquid interface)
for comparing the results.there is a big difference between total energies.
I did not see jump in energy at temp of melting or freezing .

​yes. this is why people use other methods to determine the melting point.​
you cannot simply translate macroscopic behavior to molecular simulations.​

  Energy decreases and becomes constant at each temperature.

can you help me with this problem?

​this is a conceptual problem. ​