Show that for incompressible flow of a Newtonian fluid, the rate of viscous work per unit volume can be simplified to =2+ where is the viscous dissipation function given by =2[()2+()2+()2]+[(+)2+(+)2+(+)2].

(The text isn't properly displayed above so refer to the Picture below for the problem statement.)

f a Newtonian fluid, the rate of viscous work per unit volume can be simplified to =v2v+ whe oy=2[(xvx)2+(yvy)2+(zvz)2]+[(yvx+xvy)2+(zvy+yvz)2+(xvz+zvx)2]