FEM ConstraintFlowVelocity/it

Description
Da fare

Usage

 * 1) Click on  [[Image:Fem-constraint-flow-velocity.svg|32x32px]] or choose Model → Fluid Constraints  →   from the top menu
 * 2) The task panel for constraint flow velocity appears [[File:FEM-constraint-flow-velocity task-panel.png]]
 * 3) Select the target Edges or Faces
 * 4) Click
 * 5) Untick "unspecified" to activate the necessary fields for edition
 * 6) Fill in the values in mm/s for the main cartesian components