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	fs	1.0 fs
metal	ps	0.001 ps
si	s	1.0e-8 s (10 ns)
cgs	s	1.0e-8 s (10 ns)
electron	fs	0.001 fs
micro	\(\mu\)s	2.0 \(\mu\)s
nano	ns	0.00045 ns