From: Jiaqi Zhang Date: Fri, 25 Sep 2020 23:17:48 +0000 (-0400) Subject: Update examples/step-74/doc/intro.dox X-Git-Tag: v9.3.0-rc1~687^2~7 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a61ce3e421203054474af001dbd90f448a4e2a13;p=dealii.git Update examples/step-74/doc/intro.dox Co-authored-by: Wolfgang Bangerth --- diff --git a/examples/step-74/doc/intro.dox b/examples/step-74/doc/intro.dox index 1db62e63a9..9e5c1c50a3 100644 --- a/examples/step-74/doc/intro.dox +++ b/examples/step-74/doc/intro.dox @@ -77,7 +77,7 @@ The discretization using the SIPG is given by the following weak formula

The penalty parameter

The parameter is defined as $\sigma = \gamma/h_f$, where $h_f$ a local length scale associated -with the cell face, here we choose the length of the cell in the direction normal to the face, +with the cell face; here we choose the length of the cell in the direction normal to the face, and $\gamma$ is the penalization constant. To ensure the discrete coercivity, the penalization constant has to be large enough @cite ainsworth2007posteriori. People do not really have consensus on which precise formula to choose, among what was proposed in the literature.