压降

Nonlinear relationship of the pressure drop on velocity for the permeable media equation

∆ p = - (D μ U + \frac{1}{2} I ρ {|\begin{matrix} U \end{matrix}|}^{2}) \cdot L

Δp[Pa]	Pressure drop
μ[Pa.s]	Dynamic viscosity of the fluid
U[m/s]	Velocity of the fluid
D[1/m²]	Darcy coefficient
I[1/m]	Inertial coefficient
ρ[kg/m³]	Density of the fluid
L[m]	Permeable media length in the flow direction

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