Question: The velocity field given in Prob. 2.4 is called vortex flow. For vortex flow, calculate: (a) The time rate of change of the volume of

The velocity field given in Prob. 2.4 is called vortex flow. For vortex flow, calculate:

(a) The time rate of change of the volume of a fluid element per unit volume

(b) The vorticity

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