timestep command

Syntax

timestep dt

• dt = timestep size (time units)

Examples

timestep 2.0
timestep 0.003

Description

Set the timestep size for subsequent molecular dynamics simulations. See the units command for the time units associated with each choice of units that LAMMPS supports.

The default value for the timestep size also depends on the choice of units for the simulation; see the default values below.

When the run style is respa, dt is the timestep for the outer loop (largest) timestep.

Restrictions

none

Related commands

fix dt/reset, run, run_style respa, units

Default

choice of units	time units	default timestep size
lj	tau	0.005 tau
real	fmsec	1.0 fmsec
metal	psec	0.001 psec
si	sec	1.0e-8 sec (10 nsec)
cgs	sec	1.0e-8 sec (10 nsec)
electron	fmsec	0.001 fmsec
micro	usec	2.0 usec
nano	nsec	0.00045 nsec