🌪️ Fluidized Bed Hydrodynamics & Minimum Fluidization
Calculate gas-solid fluidized bed hydrodynamics: minimum fluidization velocity (Umf), terminal free-fall velocity (Ut), Archimedes number, Geldart particle classification, and bed pressure drop.
⚡ Fortran 90 Engine
Double Precision (IEEE 754)
✓ ISO / ASME Validated
📊 Solver Telemetry
● ACTIVE
👁️ Consultations
38
⚡ Calculs faits
32
💾 Téléchargements
382
📦 Code Fortran
4.5 KB
📅 Mise en service
Jun 2026
⏱️ Latence
< 1 ms
🌪️ Gas-Solid Fluidized Bed Hydrodynamics & Bubble Eruption
Real-time visual simulation: Gas distributor grid, particle bed expansion, and rising void bubbles📝 Configuration & Presets
🔥 Sand Combustor (Geldart B)
⚡ FCC Regenerator (Geldart A)
🪵 Biomass Gasifier (Geldart D)
💊 Pharma Batch Dryer
Wen & Yu / Ergun Fluidization Formulation:
• Archimedes Number: Ar = dp³ · ρg · (ρp − ρg) · g / μg²
• Minimum Fluidization Reynolds: Remf = √(33.7² + 0.0408 Ar) − 33.7
• Minimum Fluidization Velocity: Umf = Remf · μg / (ρg · dp) [m/s]
• Bed Pressure Drop: ΔPbed = (1 − εmf) · (ρp − ρg) · g · H₀ [kPa].
• Archimedes Number: Ar = dp³ · ρg · (ρp − ρg) · g / μg²
• Minimum Fluidization Reynolds: Remf = √(33.7² + 0.0408 Ar) − 33.7
• Minimum Fluidization Velocity: Umf = Remf · μg / (ρg · dp) [m/s]
• Bed Pressure Drop: ΔPbed = (1 − εmf) · (ρp − ρg) · g · H₀ [kPa].
📊 Fluidization Results
Configure inputs and click Compute to view results.
📘 Calculation Methodology & Fluidization Standards
Geldart Particle Groups
Categorizes gas-solid fluidization behavior into 4 groups: Group A (aeratable catalysts), Group B (sand bubbling), Group C (cohesive fine powders), and Group D (coarse spouting grains).
Constant Pressure Drop Principle
Once fluidization begins ($U_0 \ge U_{mf}$), the total pressure drop across the bed remains constant and equals the apparent buoyant weight of the bed per unit area.
Key Engineering Assumptions
- Wen & Yu (1966) correlation for $Re_{mf}$ across broad Archimedes numbers.
- Haider & Levenspiel terminal velocity equation for non-spherical particles.
- Applicable to CFB boilers, FCC regenerators, biomass gasifiers, and drying beds.