A viscous flow has Infinite shear stress throughout the flow
     A viscous flow has:  Infinite shear stress throughout the flow  Zero shear stress throughout  Finite shear stress at the solid boundary but zero shear stress elsewhere  Zero shear stress at the solid boundary but finite shear stress elsewhere  Significant shear stress in the boundary layer next to the solid boundary 
  
  Solution
d.zero at solid boundary and finite elsewhere

