💧 Falling Film Evaporator & Desalination Sizer
Size falling film evaporators and MED desalination plants: Chun & Seban falling film correlation, minimum wetting rate, vapor generation rate, and steam economy.
⚡ Fortran 90 Engine
Double Precision (IEEE 754)
✓ ISO / ASME Validated
📊 Solver Telemetry
● ACTIVE
👁️ Consultations
35
⚡ Calculs faits
27
💾 Téléchargements
367
📦 Code Fortran
4.1 KB
📅 Mise en service
Jun 2026
⏱️ Latence
< 1 ms
💧 Falling Wavy Liquid Film & Steam Condensation Jacket
Real-time visual simulation: Gravity falling liquid film with vapor bubbles and outer condensing steam📝 Configuration & Presets
🌊 Seawater MED Desalination
🥛 Skim Milk Concentration
🪵 Black Liquor Evaporator
🎋 Sugar Juice Evaporation
Chun & Seban Falling Film Model:
• Peripheral Wetting: Γ = ṁfeed / (Nt · π · Di) [kg/(m·s)]
• Film Reynolds: Ref = 4 Γ / μL
• Minimum Wetting Criteria: Γmin ≥ 0.04 kg/(m·s) (Prevents tube dryout & scaling)
• Evaporation Duty: Q̇ = U · A · (Tsteam − Tevap) [kW].
• Peripheral Wetting: Γ = ṁfeed / (Nt · π · Di) [kg/(m·s)]
• Film Reynolds: Ref = 4 Γ / μL
• Minimum Wetting Criteria: Γmin ≥ 0.04 kg/(m·s) (Prevents tube dryout & scaling)
• Evaporation Duty: Q̇ = U · A · (Tsteam − Tevap) [kW].
📊 Evaporation Performance Results
Configure inputs and click Compute to view results.
📘 Calculation Methodology & Falling Film Standards
Thin Wavy Liquid Film Evaporation
Falling film evaporators operate with liquid descending as a thin film along the inner wall of vertical tubes under gravity, enabling very high heat transfer coefficients and low residence times.
Minimum Wetting Rate ($\Gamma_{min}$)
Maintaining adequate liquid flow per perimeter prevents dry spots, which cause severe fouling, scaling, and tube burnout.
Key Engineering Assumptions
- Chun & Seban turbulent and laminar falling film correlation.
- Saturated steam condensation on the outer shell side.
- Widely used in multi-effect distillation (MED) seawater desalination, milk powder plants, and black liquor recovery.