petsc-3.7.1 2016-05-15
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TSAlphaSetRadius

sets the desired spectral radius of the method (i.e. high-frequency numerical damping)

Synopsis

#include "petscts.h"   
PetscErrorCode TSAlphaSetRadius(TS ts,PetscReal radius)
Logically Collective on TS Many br

The algorithmic parameters \alpha_m and \alpha_f of the Many brgeneralized-\alpha method can be computed in terms of a specified Many brspectral radius \rho in [0,1] for infinite time step in order to Many br

control high-frequency numerical damping

\alpha_m = 0.5*(3-\rho)/(1+\rho) Many br\alpha_f = 1/(1+\rho) Many br

Input Parameter

ts - timestepping context Many br
radius - the desired spectral radius Many br

Options Database

-ts_alpha_radius <radius> - Many br Many br

See Also

TSAlphaSetParams(), TSAlphaGetParams()

Level:intermediate
Location:
src/ts/impls/implicit/alpha/alpha1.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages