- A transition in a 30 cm diameter pipe reduces the diameter to 15 cm without any deflection of flow. The kinetic energy correction factor α in 30 cm pipe is 1.3 and in 15 cm pipe is 1.9. The pressure and mean velocity in 15 cm pipe at the end of transition are to be 15 kPa and 6 m/s. respectively. Calculate: a) The pressure in 30 cm pipe. b) The resultant force R on the transition due to flow of water. Neglect any loses in the transition.