Ergun Packed Bed Pressure Drop Calculator

Chemical reactor engineering & filtration: Calculate total pressure drop ($\Delta P$), Blake-Kozeny laminar and Burke-Plummer turbulent components, modified friction factor ($f_p$), and minimum fluidization velocity ($u_{mf}$).

Packed Bed & Particle Geometry

Particle Diameter d_p (mm): Equivalent spherical diameter

Particle Sphericity Φ_s:

Bed Void Fraction ε (Porosity): Typical random packing: 0.38 - 0.45

Packed Bed Length L (m):

Superficial Velocity v₀ (m/s): Approach velocity (empty pipe)

Particle Density ρ_p (kg/m³):

Fluid Density ρ (kg/m³): Air = 1.204, Water = 998

Dynamic Viscosity μ (Pa·s): Air = 1.825×10⁻⁵ Pa·s

Pressure Drop & Hydrodynamic Output

Total Pressure Drop ΔP:

kPa

Pressure Gradient ΔP/L:

kPa / m

Particle Re_p:

Reynolds number

Viscous Fraction:

% laminar (Kozeny)

Min Fluidization u_mf:

m / s

Ergun Components Breakdown

Viscous Term (Blake-Kozeny): -- kPa/m

Inertial Term (Burke-Plummer): -- kPa/m

Interstitial Pore Velocity v_pore: -- m/s

Bed State: --

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Ergun Packed Bed Pressure Drop Calculator

Packed Bed & Particle Geometry

Pressure Drop & Hydrodynamic Output

Ergun Components Breakdown

Frequently Asked Questions