包含以下部分：
涡量
ζ → = 2 ω → = ∇ → × V → {\displaystyle {\vec {\zeta }}=2{\vec {\omega }}{=}{{\vec {\nabla }}\times {\vec {V}}}}
1 2 ( ∂ w ∂ y − ∂ v ∂ z ) ⏟ ω x + 1 2 ( ∂ u ∂ z − ∂ w ∂ x ) ⏟ ω y + 1 2 ( ∂ v ∂ x − ∂ u ∂ y ) ⏟ ω z {\displaystyle \underbrace {{\frac {1}{2}}({\partial w \over \partial y}-{\partial v \over \partial z})} _{\omega _{x}}+\underbrace {{\frac {1}{2}}({\partial u \over \partial z}-{\partial w \over \partial x})} _{\omega _{y}}+\underbrace {{\frac {1}{2}}({\partial v \over \partial x}-{\partial u \over \partial y})} _{\omega _{z}}}
