“Hagen–Poiseuille equation”的概念、定义、翻译、参考文献-科学参考

单词	Hagen–Poiseuille equation
释义	Hagen–Poiseuille equation Chemical Engineering An equation used to determine the rate of flow of a Newtonian fluid with laminar flow expressed as: $Q = \frac{π}{8 μ} \frac{Δ p}{L} R^{4}$ where μ is the viscosity of the fluid, Δp/L is the pressure drop per unit length of pipe, and R is the pipe inner radius. It is named after G. Hagen and J. Poiseuille who independently derived this equation in 1839 and 1840, respectively.
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