How to move one surface by fixing another surface?

Hi,
     After constructing a model with two surfaces placing a fluid in middle I want to fix the bottom  surface and by applying pressure load I want to move upper surface with constant velocity. By constraining bottom surface i tried to use confined shear calculation in forcite but an error showed that the confined shear calculations are not possible with constrained surfaces. 
   I am new to materials studio and it would be great helpful to me if someones helps regarding this.