Abstract
This paper presents a new algorithm for solving the general state function based flash problem. The algorithm uses the canonical variables to the state function to solve the equation of state. Doing so moves some of the complexity of the flash problem to the equation of state solver, effectively simplifying the phase-split problem.
A two-phase example is described and examined over a wide range of temperature and pressure conditions. A multiphase (up to four-phase) mixture is used as a demonstration of the method for solving multiphase flash problems. It is demonstrated that the solution algorithm takes a similar CPU-time to that used for solving conventional flash problems. The proposed algorithm will help to robustly solve general, difficult flash problems commonly encountered in modern process and reservoir simulations.
A two-phase example is described and examined over a wide range of temperature and pressure conditions. A multiphase (up to four-phase) mixture is used as a demonstration of the method for solving multiphase flash problems. It is demonstrated that the solution algorithm takes a similar CPU-time to that used for solving conventional flash problems. The proposed algorithm will help to robustly solve general, difficult flash problems commonly encountered in modern process and reservoir simulations.
| Original language | English |
|---|---|
| Article number | 113795 |
| Journal | Fluid Phase Equilibria |
| Volume | 571 |
| Number of pages | 12 |
| ISSN | 0378-3812 |
| DOIs | |
| Publication status | Published - 2023 |
Keywords
- Algorithm
- Equation of state
- Flash calculation
- Phase equilibrium
- State function