Blood ejection from a ventricle to aorta Elmer tutorial
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Instructions for postprocessing
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* In main Elmer Post window:

math nodes0 = nodes

* In Time Step Control panel:

math u = Displacement(0:2,time($t));
math u(0:1,416:1221) = u(0:1,416:1221)*20;
math nodes = nodes0 + u


- the node indexes 416-1221 correspond the 
  the volumes which face the FSI coupling.

- integer 20 is the magnification parameter
  for the displacements 






