NSW: Difference between revisions
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:In all minimization algorithms (quasi-Newton, conjugate gradient, and damped molecular dynamics) {{TAG|NSW}} defines the maximum number of ionic steps. | :In all minimization algorithms (quasi-Newton, conjugate gradient, and damped molecular dynamics) {{TAG|NSW}} defines the maximum number of ionic steps. | ||
Within each ionic step at most {{TAG|NELM}} electronic steps are performed. It is fewer if the convergence | Within each ionic step at most {{TAG|NELM}} electronic steps are performed. It is fewer if the convergence criterion set by {{TAG|EDIFF}} is met before. Forces and stresses are calculated according to the setting of {{TAG|ISIF}} for each ionic step. | ||
==Related tags and articles== | ==Related tags and articles== | ||
Latest revision as of 11:03, 21 January 2026
NSW = [integer]
Default: NSW = 0
Description: NSW sets the maximum number of ionic steps.
IBRION = 0:
- NSW gives the number of steps in all molecular dynamics runs. It has to be supplied, otherwise VASP exits immediately after having started. We recommend splitting long MD runs containing ab-initio calculations into multiple calculations with NSW⪅20000. For ML_MODE=run larger values of NSW should be possible, but consider setting ML_OUTBLOCK.
IBRION != 0:
- In all minimization algorithms (quasi-Newton, conjugate gradient, and damped molecular dynamics) NSW defines the maximum number of ionic steps.
Within each ionic step at most NELM electronic steps are performed. It is fewer if the convergence criterion set by EDIFF is met before. Forces and stresses are calculated according to the setting of ISIF for each ionic step.