oil_twu_critical_properties
Calculate critical temperature, pressure, and volume for petroleum fractions using Twu correlation to support EOS fluid characterization, phase behavior modeling, and compositional simulation.
Instructions
Calculate critical properties using Twu (1984) correlation.
CRITICAL PROPERTIES ESTIMATION - Most widely used method for estimating Tc, Pc, Vc for petroleum fractions and plus fractions.
Twu Method:
More accurate than older correlations (Riazi-Daubert, Kesler-Lee)
Uses molecular weight and specific gravity
Optional boiling point for improved accuracy
Damping factor for heavy ends
Returns:
Tc: Critical temperature (°R)
Pc: Critical pressure (psia)
Vc: Critical volume (cuft/lbmol)
Also returns: SG, Tb (if not provided)
Critical for:
EOS (PR, SRK) fluid characterization
Plus fraction splitting
Compositional simulation
Phase behavior modeling
Args: request: Molecular weight, specific gravity, optional boiling point, damping
Returns: Dictionary with all critical properties
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| request | Yes |