渦度・流れ関数法
∂ u ∂ t + ( u ⋅ ∇ ) u = − 1 ρ ∇ p + ν ∇ 2 u {\displaystyle {\frac {\partial {\boldsymbol {u}}}{\partial t}}+({\boldsymbol {u}}\cdot \nabla ){\boldsymbol {u}}=-{\frac {1}{\rho }}\nabla p+\nu \nabla ^{2}{\boldsymbol {u}}}