Forces that may act in a flow situation include those due to pressure, FP; gravity, FG; viscosity, FV; elasticity, FE; surface tension, FT; and the inertia force, FI. As noted in Chapter 7, depending...

Forces that may act in a flow situation include those due to pressure, FP; gravity, FG; viscosity, FV; elasticity, FE; surface tension, FT; and the inertia force, FI. As noted in Chapter 7, depending upon the fluid flow problem, while the inertia force will always be important, some of the above-listed forces may not play a significant role. Explain why the inertia force will always be important and how it is modeled in the dynamic similarity.