Consider the system below .An air stream flows over a thin film on the floor .Air exerts a constant shear stress on the surface of the liquid film T0.

The local film thickness h h and q , show by substitution that h=ux/T0t is a feasible solution to the partial deferential equation

1. Consider the systen below. An airstream flows oner a reay thinfilm outhe foor. Air exerts a consteint shar strees on the surface of the liquid tilu 0. In The loeal film thicknese h the gopp. Width. Assume that in the liguid there is ouly vx which varies mainh with y. Obtain the relocityprofile vx=c2y> fow rate q=2C0h2. Formulate a covsetration of mass equalion connecting h ane q, Show by subgtitu tion that h=E0tx is a feasiblesolution