2.5.2 Artificial viscosity
Inserting the Lax-Friedrichs flux (
115
) into the conservative update formula (
99
) results in
(119)
The last term looks like a 2nd derivative and is called
artificial viscosity
.
In general, the flux of any scheme can be written in the form
(120)
Sometimes, the Lax-Wendroff flux is used as reference,
(121)