1 "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
3 :link(lws,http://lammps.sandia.gov)
5 :link(lc,Section_commands.html#comm)
15 dt = timestep size (time units) :ul
24 Set the timestep size for subsequent molecular dynamics simulations.
25 See the "units"_units.html command for the time units associated with
26 each choice of units that LAMMPS supports.
28 The default value for the timestep size also depends on the choice of
29 units for the simulation; see the default values below.
31 When the "run style"_run_style.html is {respa}, dt is the timestep for
32 the outer loop (largest) timestep.
38 "fix dt/reset"_fix_dt_reset.html, "run"_run.html,
39 "run_style"_run_style.html respa, "units"_units.html
43 choice of "units"_units.html : time units : default timestep size
45 real : fmsec : 1.0 fmsec
46 metal : psec : 0.001 psec
47 si : sec : 1.0e-8 sec (10 nsec)
48 cgs : sec : 1.0e-8 sec (10 nsec)
49 electron : fmsec : 0.001 fmsec
50 micro : usec : 2.0 usec
51 nano : nsec : 0.00045 nsec :tb(s=:,a=l,ea=c)