Ideal fluids streamlines do not meet or cross velocity vector is tangent to streamline A streamline A volume of fluid follows a tube of flow bounded by streamlines Flow obeys continuity equation volume flow rate Q=Av is constant along flow tube A1V,=A2v2 follows from mass conservation if flow is compressible. Physics 121: Lecture 21, Pg 6Physics 121: Lecture 21, Pg 6 Flow obeys continuity equation volume flow rate Q = A·v is constant along flow tube. follows from mass conservation if flow is incompressible. A1 A2 v1 v2 streamline A1v1 = A2v2 Ideal Fluids streamlines do not meet or cross velocity vector is tangent to streamline volume of fluid follows a tube of flow bounded by streamlines