Multiphase dissolution flows
Analytical models have been developed to calculate steady and unsteady one-dimensional nonhomogeneous multiphase dissolution flows in variable area inclined channels. The models are based on conservation of mass and momentum of each of the phases for a liquid containing dissolved gas which tends to come out of solution in a supersaturated pressure field. The steady-state system of nonlinear initial value differential equations is solved numerically by a iterative variable step-size predictor-corrector algorithm for the presssure, void fraction and velocity profiles. This method incorporates the capability of predicting choked flow. The method of calculating transient multiphase flow is presented based on a modified implicit multifield (IMF) method for the field variables using a drift-flux model. The unsteady finite difference method incorporates the flexibility for variabel advanced timing of convective terms from a fully implicit to purely explicit form. This numerical method incorporates spatial coupling of pressure and incremental pressure terms which results in order-of-magnitude gains in computation time. Steady and unsteady numerical calculations are presented to demonstrate the validity and accuracy of each code for a wide range of multiphase flows. These problems include the numerical calculation of steady full dissolution and single-phase flows and unsteady calculations of pressure pulse propagation, blowout phenomena, flow oscillation and asumptotic behavior. The immediate application of the present work was to analyze multiphase dissolution flows for compressed air energy storage (CAES) systems.
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, NY (USA)
- OSTI ID:
- 6346103
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multi-phasing CFD
Numerical calculation of flashing from long pipes using a two-field model
Related Subjects
250200 -- Energy Storage-- Compressed & Liquified Gas
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
640420 -- Fluid Physics-- Properties & Structure of Fluids-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPRESSED AIR ENERGY STORAGE
DIFFERENTIAL EQUATIONS
ENERGY STORAGE
EQUATIONS
FLUID FLOW
FLUIDS
GASES
LIQUIDS
MATHEMATICAL MODELS
MULTIPHASE FLOW
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
STORAGE