Mercurial > repos > public > sbplib

view +time/+rk4/rungekutta_4.m @ 969:adae8063ea2f feature/poroelastic

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Remove silly getBoundaryOperator* methods in multiblock.DiffOp and make the getBoundaryOperator and getBoundaryQuadrature methods use the scheme.getBoundaryOperator/Quadrature methods instead of properties.
author Martin Almquist <malmquist@stanford.edu>
date Tue, 25 Dec 2018 07:21:19 +0100
parents 48b6fb693025
children
line wrap: on
line source

% Takes one time step of size k using the rungekutta method
% starting from v_0 and where the function F(v,t) gives the
% time derivatives.
function v = rungekutta_4(v, t , k, F)
    k1 = F(v         ,t      );
    k2 = F(v+0.5*k*k1,t+0.5*k);
    k3 = F(v+0.5*k*k2,t+0.5*k);
    k4 = F(v+    k*k3,t+    k);
    v = v + (1/6)*(k1+2*(k2+k3)+k4)*k;
end