Initialization

The following inputs must be preceded by mfix and determine how we initialize a calculation:

	Description	Type	Default
do_initial_proj	Perform an initial projection	Bool	True
initial_iterations	Number of pressure iterations to execute before time-marching	Int	3
scale_init_dt	Factor by which dt is scaled in the initial iterations and step. Must be a value <= 1.0	Real	1.0

Note

scale_init_dt is applied before dt_max when using adaptive time steps, i.e. the timestep is computed as min(max_dt, scale_init_dt * dt0) where dt0 is the step before scaling and bracketing, not scale_init_dt * min(max_dt, dt0). As a result, if max_dt is already smaller than the allowed adaptive timestep, changing scale_init_dt will have no effect.

	Description	Type	Default
restart	If set, then restart from this file rather than from scratch	String	None

	Description	Type	Default
repl_x	Replicate initial data by this factor in the x-direction	Int	1
repl_y	Replicate initial data by this factor in the y-direction	Int	1
repl_z	Replicate initial data by this factor in the z-direction	Int	1