This quantity, dotted with its tensor derivative gives the convective term in the Navier-Stokes Equation.
This quantity, dotted with its tensor derivative gives the convective term in the Navier-Stokes Equation. A converging cone and no Vena Contracta characterize a meter for measuring this that works on an effect named for the same scientist that requires this quantity increase to satisfy the continuity equation.  Measured by the Venturi meter, this quantity, along with length of a pipe and viscosity, is used to define the Reynolds number. Vorticity is the curl of this quantity which increases and decreases along with pressure changes according to Bernoulli's principle. The ratio of this number to that of sound in the same medium is called the Mach number. FTP, name this quantity which describes how fast a liquid or gas is moving.
This quantity, dotted with its tensor derivative gives the convective term in the Navier-Stokes Equation.
velocity