Validating Ionic Liquid Simulations: Error Analysis and Implications

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SUMMARY

The discussion centers on the validation of ionic liquid simulations conducted using LAMMPS. The author initially believed their simulations were accurate, as the volume (V) comparisons with experimental data showed less than 3% error. However, upon comparing pressure (P) values, discrepancies of 50% to 300% were discovered, raising concerns about the validity of the simulation results. The author seeks clarification on whether these findings undermine the reliability of their data for further calculations.

PREREQUISITES
  • Understanding of LAMMPS simulation software
  • Knowledge of ionic liquid properties and behavior
  • Familiarity with error analysis in scientific simulations
  • Basic principles of thermodynamics related to pressure, volume, and temperature
NEXT STEPS
  • Investigate LAMMPS documentation on ionic liquid simulations
  • Learn about error analysis techniques in computational chemistry
  • Research methods for validating simulation data against experimental results
  • Explore advanced statistical methods for comparing simulation and experimental data
USEFUL FOR

Researchers in computational chemistry, simulation scientists, and anyone involved in validating ionic liquid properties through computational methods.

hosein
Dear all,
I've been working on an ionic liquid that I was involved in simulating with Lammps, but when I started to write its paper, I found a mistake (or a neglect) that makes almost all the results useless. I would always compare the pVT simulation data with the corresponding experimental data with an error below 3% for the comparison of V of simulation and experimental (in P, T similar), and so I assumed my simulations are validated, but when a couple of weeks ago, I compared p of simulation and experimental (in V, T similar), I found a very weird error of in average 50, sometimes 300%. What is this mean?
I mean, can I assume that my simulation data are validated and use them for further calculation?

Best regards
 
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This is messy. You failed to give us enough information, and you ask for a detailed answer.

No way to help you based on what you wrote.
 
Borek said:
This is messy. You failed to give us enough information, and you ask for a detailed answer.

No way to help you based on what you wrote.
--------simulation--------experimental
----------T1----------------------T1
V1-------P1----------------- press1
V2 -------P2----------------press2
.-----------. ---------------------.
.-----------.----------------------.
.----------- . --------------------- .
T1=T1
E%=((P1,2,...-press1,2,...)/press1,2,...)*100=50 or sometimes >200
if I fit the press values with V1,V2, ... and produce a formula to compare them, then I use P1, P2, ... to produce the corresponding volume results( V'1, V'2, ...)
the error would be:
E%=((V1,2,...-V'1,2,...)/V1,2,...)*100= 3%<
Best regards
 

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