**process spherical

Description

This process is used to compute the spherical part of a second order tensor.

\[\ten A^{spherical} = \dfrac{\it tr~{\ten A}}{3}\ten 1\]

Syntax

**process spherical \(~\,\) *var var_name

The name of the output tensor is sph_+var_name.

Example

% this will provide sph_sig
**process spherical
  *var sig