of.timestep

of.timestep *type* <string> *timestep* <Real>

Set the user defined timestep. The type can be fix, auto or creep. OpenFDEM will compute the default timestep which can result in stable results. Be careful to set the timestep yourself only when you understand explicit dynamic modelling.

OpenFDEM will print out the default timestep and give a warning to you if your defined timestep is larger than the default value.

Parameters:

type: (default auto) auto updates the mechanical timestep, fix sets a user-defined mechanical timestep, and creep reads a creep timestep value.

timestep: (optional) fixed time step

Example:

# Default
of.timestep auto
# Fixed time step
of.timestep fix 1.0e-9
# Creep time step
of.timestep creep 1.0e-6