On Tue, Oct 8, 2013 at 12:18 AM, Jed Brown <[email protected]> wrote:
> Barry Smith <[email protected]> writes: > >> - In this type of problem, which TS scheme is recommended ? TSARKIMEX ? > > > > Beats me. > > ARKIMEX should give you a decent integrator with adaptive error control. > Use '-ts_arkimex_type 1bee' to use backward Euler with an > extrapolation-based error estimator. > Good to know. I tried TSBEULER but it has constant timestep. -Is there any other TS with adaptive timestep ? -With ARKIMEX, is there a way to control the timestep ? For instance, is it possible to control the max factor between two successive timesteps (dt' = factor*dt), in order to avoid rejections ? - Is it possible to have Cranck-Nicholson with adaptive timestep ? I tried TSCN but it seems timestep is constant. - I also tried TSROSW. Seems to work quite well in some cases. How does it compare to ARKIMEX ? Christophe
