1) In a gas absorption experiment a viscous fluid flows upward through a small circular tube and then downward in laminar flow on the outside. Set up a momentum balance over a shell of thickness Ar in the film, as shown in the figure. Obtain the velocity distribution and find the maximum velocity. Velocity distribution inside tube z-Momentum into shell of thickness Ar k HH Velocity distribution outside in film Ar z-Momentum out of shell of thickness Ar Gravity force acting on the volume 27rArL