question_answer

Which one of the following is satisfied if the flow is irrotational for a two-dimensional fluid element in the \[x-y\] plane?

A) \[\frac{\partial v}{\partial x}=\frac{\partial u}{\partial y}\]                        

B) \[\frac{\partial v}{\partial x}=\frac{\partial u}{\partial y}\]

C) \[\frac{\partial u}{\partial x}=\frac{\partial v}{\partial y}\]                        

D) \[\frac{\partial u}{\partial x}=\frac{\partial v}{\partial y}\]