petsc-3.14.6 2021-03-30

TSRKSetMultirate

Use the interpolation-based multirate RK method

Synopsis

#include "petscts.h"   
PetscErrorCode TSRKSetMultirate(TS ts,PetscBool use_multirate)

Logically collective

Input Parameter

	ts	- timestepping context
	use_multirate	- PETSC_TRUE enables the multirate RK method, sets the basic method to be RK2A and sets the ratio between slow stepsize and fast stepsize to be 2

Options Database

-ts_rk_multirate

- <true,false>

Notes

The multirate method requires interpolation. The default interpolation works for 1st- and 2nd- order RK, but not for high-order RKs except TSRK5DP which comes with the interpolation coeffcients (binterp).

Level

intermediate

Location

src/ts/impls/explicit/rk/rk.c

Implementations

TSRKSetMultirate_RK in src/ts/impls/explicit/rk/mrk.c

Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages