mp1 = maillageSain.GroupOnGeom(P1,'P1',SMESH.NODE)
mp2 = maillageSain.GroupOnGeom(P2,'P2',SMESH.NODE)
ext = maillageSain.GroupOnGeom(EXTUBE,'EXTUBE',SMESH.FACE)
mp1 = maillageSain.GroupOnGeom(P1,'P1',SMESH.NODE)
mp2 = maillageSain.GroupOnGeom(P2,'P2',SMESH.NODE)
ext = maillageSain.GroupOnGeom(EXTUBE,'EXTUBE',SMESH.FACE)