<FLOW> flow_sum

Description

This law provides a summation of different flow rates \(\dot{\lambda} = \sum_i \dot{\lambda}_i\) where the \(\dot{\lambda}_i\) are the rates given by other flow objects (other than sum_flow or flow_sum_inv).

Syntax

The syntax is the following:

*flow flow_sum \(~\,~\,\) <FLOW> \(~\,~\,\) <FLOW>

Similar kind of syntax applies to flow_sum_inv law also.

Example

A simple example is given below which uses the Norton law as one of the flow rule.

***behavior gen_evp
**elasticity isotropic
     young 260000.
     poisson 0.3
**potential gen_evp ev
 *criterion mises
 *flow flow_sum
     norton
     K 140.0
     n  5.0
 *isotropic constant
     R0 130.0