How to define eulerian region for 2D modeling of orthogonal machining using ALE adaptive mesh constraints?

HI

I am working with abaqus6.8.1. I am interesting to model orthogonal
machining by ALE adaptive remeshing IN 2D. In this way I have a problem.
For modeling of machinig inflow and outflow surfaces(eulerian) with
inflow boundary condithion type velocity(eulerian) must be defined.but
the default definition of surfaces and region or boundary type in abaqus
are lagrangian. I read on user manual that this type must be change to
eulerian.

"Set REGION TYPE=EULERIAN to create an Eulerian boundary region in an
adaptive mesh domain. This option is used to create a boundary region across which
material can flow. Mesh constraints must be used normal to an Eulerian boundary region to allow
material to flow through the region. If no mesh constraints are applied, an Eulerian boundary
region will behave in the same way as a sliding boundary region."(user manual)

how I must CHANGE THIS LAGRANGIAN TO EULERIAN? 

contact email: amir_ashrafi@hotmail.com

thank you