petsc-3.12.5 2020-03-29
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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).

See Also

TSRKGetMultirate()

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