🌀 Two-Phase Gas-Liquid Pipe Flow
Solve two-phase pressure drops using Friedel & Lockhart-Martinelli correlations, Rouhani-Axelsson void fraction, and identify flow regimes.
⚡ Fortran 90 Engine
Double Precision (IEEE 754)
✓ ISO / ASME Validated
📊 Solver Telemetry
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⚡ Calculs faits
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390
📦 Code Fortran
8.1 KB
📅 Mise en service
Jun 2026
⏱️ Latence
< 1 ms
🌀 Two-Phase Gas-Liquid Flow Regime Simulation
Real-time dynamic visualization of phase distribution & interfaces📝 Configuration & Presets
♨️ Steam-Water Boiler (Vertical)
🛢️ Oil-Gas Pipeline (Slug)
❄️ R134a Evaporator Tube
💨 Air-Water Transport
Key Formulations:
• Friedel Multiplier: (dP/dz)2φ = ΦL0² (dP/dz)L0
• Lockhart-Martinelli: Xtt = [(1−x)/x]0.9 (ρG/ρL)0.5 (μL/μG)0.1
• Void Fraction: α = Drift Flux (Rouhani-Axelsson)
• Total ΔP = ΔPfric + ρ2φ g L sin(θ)
• Friedel Multiplier: (dP/dz)2φ = ΦL0² (dP/dz)L0
• Lockhart-Martinelli: Xtt = [(1−x)/x]0.9 (ρG/ρL)0.5 (μL/μG)0.1
• Void Fraction: α = Drift Flux (Rouhani-Axelsson)
• Total ΔP = ΔPfric + ρ2φ g L sin(θ)
📊 Simulation Results
Configure inputs and click Compute to view results.
📘 Calculation Methodology & Engineering Theory
Friedel Two-Phase Multiplier
The Friedel (1979) correlation is widely accepted across ASME and HEI standards for turbulent liquid-gas flows in vertical and horizontal lines:
ΦL0² = E + 3.24 · F · H / (FrH0.045 · WeL0.035)
Drift-Flux Void Fraction ($\alpha$)
Accounting for the slip velocity between light vapor and dense liquid using Rouhani & Axelsson's drift-flux model:
α = (x / ρG) / [C₀ (x/ρG + (1−x)/ρL) + ugj / G]
Key Engineering Assumptions
- Adiabatic or slowly evaporating pipe flow (steady equilibrium quality).
- Newtonian liquid and gas phase behavior.
- Pipe wall friction evaluated via Churchill friction factor for both phases.
- Acceleration pressure gradient neglected for uniform diameter lines.