**process volume_integrate

Description

Integrates the variable over a group of elements (elset).

Syntax

**process volume_integrate \(~\,\) *list_var var

Example

The following example (cf. Thermal_test/INP/bc_volumetric_heat.inp) compares the FE and analytical solutions, by computing the \(L^2\) norm of their difference.

****post_processing
 ***global_post_processing
  **file node
  **nset ALL
  **process coordinates

 ***local_post_processing
  **file node
  **nset ALL
  **process function
   *expression ( TP - exp(X)*sin(Y)*cos(Y+Z)*(X^2 + Z^3/125) )^2;
   *output DIFF2

 ***global_post_processing
  **file node
  **nset ALL
  **process node_interpolation
   *list_var DIFF2

 ***global_post_processing
  **file integ
  **elset ALL
  **process volume_integrate
   *list_var gpDIFF2
****return