# Fluid mechanic problem

given an incompressible steady flow over a converging duct, the outlet velocity can be found just by using mass continuity equation, v1A1=v2A2.

However given a time dependent inlet velocity ie. oscillating velocity, how do i get the outlet velocity? assume the flow is incompressible and inviscid. Tried looking for navier-stoke i had no clue what it does.

Gold Member
Continuity still holds even if your inlet is time-dependent.

Continuity still holds even if your inlet is time-dependent.

so, the equation, a1v1=a2v2 is applicable unless it is compressible flow? the last i remembered it is only for steady flow, and non of the books has a worked example for time-dependent inlet flow.

minger