Q:
In the equation, ?.V=1/ v*D (v)/Dt, the term ?.V is _________
Answer & Explanation
Answer: B) divergence of velocity
Explanation: Divergence of velocity is physically the time rate of change of the volume of a moving fluid element per unit volume where v is small volume and because of this small volume, ?.V is same throughout the volume. Moving control volume is used for the physical interpretation of the divergence of velocity.
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