Monitoring WSS using Dynamic mesh
 

Dear all,
I am trying to monitor the variation of wall shear stress on a pipe, whose wall is continuously deforming using the dynamic meshing feature of fluent. For this case when I choose a point on the wall surface due to the motion of the wall, it gets out of the domain and surface monitor is not working, so how to make the same point constraint so that it remains on the wall every time in order to measure the temporal variation of wall shear.
Any help in this regard is highly appreciated.