**process L2norm

Description

This post-processing computes the Euclidean norm \(L_2\) of a second order tensor \(\ten A\) for each element.

\[\|\ten A\|_{L^2(\Omega_e)} = \int_{\Omega_e} \ten A : \ten A \, dV\]

where \(\Omega_e\) is the elementary volume (or surface for 2D elements). It will also compute a global norm as

\[\|\ten A\|_{L^2(\Omega)}=\sqrt{\sum_e \|\ten A\|_{L^2(\Omega_e)}}\]

Syntax

**process L2norm \(~\,\) *list_var var1 var2 … varN \(~\,\) *output_field out_var [ *file_output output_file ] [ *screen_output ]

*list_var var1 var2 … varN *output_field out_var *file_output output_file *screen_output

Example

****post_processing
 ***global_post_processing
  **file integ
  **process L2norm
   *list_var
   *output_field
****return