Write the momentum equation for steady one- dimensional flow for the case of no external forces and explain the physical significance of its terms.

Solution 8P

The momentum equation for steady one- dimensional flow for the case of no external forces is

= 0 = .

where the left hand side is the net force acting on the control volume which is zero here.

The first term on the right hand side is the incoming momentum flux, and the second term on the right is the outgoing momentum flux by mass.