8.5 LOADSThe loads applied on the solid model should be input to the system. For the impeller, suppose the major force acts on the concave surfaces of the turbine blades. This loading can be approximated by normal pressure on all the five surfaces. Since we are not concerned about the magnitude of the load, let us take the value to be 100 lbf/in2 inch to exaggerate the deformation of the blades.