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control_timestep_iterations_automatic index ratio_criterium maximum_timestep

After specification of this record, iterations will be performed until ratio in post_node_rhside_ratio is less then ratio_criterium. Typically, set ratio_criterium to 0.01 or 0.001.

TOCHNOG will now also adjust the time step size. If few iterations are needed the time step size is increased. If many iterations are needed the time step size is decreased.

The time step specified in control_timestep is used as initial step. The time step is not allowed to become higher then maximum_timestep. If the time step becomes very low compared to the initial step, time stepping is aborted.

The initial step as specified in control_timestep, should be sufficient small so that this automatic algorithm can fulfill the ratio_criterium in that initial step.

tochnog 2001-09-02