chapter  6
Vorticity and Its Substantial Derivative
Pages 16

A systematic study is presented of the vorticity and its substantial derivative, both evaluated just downstream of a curved shock wave. As we know, the substantial derivative provides the rate of change of a property following a fluid particle. In  a steady flow, this becomes the rate of change of a property along a streamline. The substantial derivative of the vorticity determines whether or not its strength is increasing or decreasing in the flow region just downstream of the shock.