NAME

limiter - discontinuous Galerkin slope limiter (rheolef-7.1)

SYNOPSIS

template <class T, class M>
field_basic<T,M>
limiter (


   const field_basic<T,M>& uh,


   const T&                bar_g_S = 1.0,


   const limiter_option&   opt = limiter_option());

DESCRIPTION

This function returns a slope limited field for any supplied discontinuous approximation.

    geo omega ("square");


    space Xh (omega, "P1d");


    field uh (Xh);


    ...


    field vh = limiter(uh);

It implements the minmod_TVB limiter for hyperbolic nonlinear problems approximated by discontinuous Galerkin methods. See the usersguide for details and examples.

OPTIONS

struct limiter_option {


  bool active; 


  Float theta; // > 1, see Coc-1998, P. 209


  Float M;     // M=max|u''(t=0)(x)| at x where u'(t)(x)=0 :extremas


  limiter_option() : active(true), theta(1.5), M(1) {}
};

IMPLEMENTATION

This documentation has been generated from file main/lib/limiter.h

AUTHOR

Pierre Saramito <Pierre.Saramito@imag.fr>

COPYRIGHT

Copyright (C) 2000-2018 Pierre Saramito <Pierre.Saramito@imag.fr> GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.