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Channeling in Fixed Bed Extractors

Calculation guide for assessing hydraulic performance and potential channeling in fixed-bed extractors using Ergun correlation.

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1. Define Input Parameters

2. Engineering Output

Superficial Velocity (v)
- m s⁻¹
Particle Reynolds Number (Re_p)
- -
Viscous Ergun Term (term_viscous)
- Pa m⁻¹
Inertial Ergun Term (term_inertial)
- Pa m⁻¹
Pressure Drop per Unit Length (dP_per_L)
- Pa m⁻¹
Total Pressure Drop (dP_total)
- Pa
Total Pressure Drop in Bar (dP_total_bar)
- bar
Minimum Fluidisation Velocity (v_mf)
- m s⁻¹

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Context & Assumptions

Fixed-bed extractors are widely used in various industries for processes like solid-liquid extraction. Uneven flow distribution, known as channeling, can severely reduce extraction efficiency and lead to operational problems. This tool provides a quick engineering check of the hydraulic performance to help designers predict whether operating conditions will result in uniform flow or trigger channeling.

Understand the Engineering Principles

Review the step-by-step derivations, typical industrial limits, and scale-up rules.

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