Dear All,
I am trying to model a dc discharge in nitrogen with plasma module.
The time dependent solver works fine to a point with time steps of 10^-8s. However, at a cetain instance in time, there is a very sharp rise (or pulse) in one of the paramteres (current). At this point the solver gets upset and starts diverging. I am guessing that I need finer time steps at this point.
Is it possible to use variable time steps so that I can 'program' to select 'finer time intervals' when the sharp rise in current occurs and use regular time steps when the parameters are mostly uniform. How?