Pressure Drop - Calculation

Calculation

Pressure Drop can be calculated using two values: the Reynolds Number, Re (determining laminar or turbulent flow), and the relative roughness of the piping, ε/D.

Where D is the diameter of the pipe, v is the velocity of the fluid, ρ is the density of the fluid, and μ is the dynamic viscosity of the fluid. The relative roughness of the piping is usually known; by cross referencing the Reynolds number with the relative roughness, the friction factor, f, is calculated.

f=\frac{\Delta P \frac{\pi R^{2}}{2\pi R \Delta L}} {\frac{1}{2}\rho v^{2}}

Where solving for ΔP will allow for the calculation of pressure drop through a pipe.

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