A discrete particle model for bubble-slug two-phase flows

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Journal of Computational Physics; (United States)

DOI:https://doi.org/10.1006/jcph.1993.1151· OSTI ID:5546156

Trapp, J A ^[1]; Mortensen, G A ^[2]

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1. Univ. of Colorado, Denver (United States) Colorado and Idaho National Engineering Lab., Idaho Falls (United States)
2. Idaho National Engineering Lab., Idaho Falls (United States)

Most two-phase flow models are based on the fully averaged two-fluid concept. This paper describes a new discrete particle model that is intermediate between the numerically intractable local instant description and the fully averaged two-fluid model, thereby providing a more detailed but still tractable description of dynamical two-phase flow phenomena. The new model uses a Lagrangian description for a single dispersed bubble phase and a one-dimensional Eulerian description for a single continuous liquid phase. In contrast to many other particle simulation models, the present model includes compressible phases and large bubbles whose size may be comparable to the computational cell size. The discrete Lagrangian description of the dispersed phase allows the particles to have a distribution of sizes, shapes, etc., thereby capturing the important statistical aspects of dispersed two-phase flow. In contrast to the two-fluid models, the discrete particle model allows the use of more mechanistic models for dispersed phase coalescence and breakup, wakes, etc., thereby allowing the dynamic prediction of flow regime evolution and transitions without the use of flow regime maps inherent in two-fluid models. Numerical simulation for two test problems are presented. Agreement with experimental data is generally satisfactory. Extensions of the model to heat transfer and to two discrete and two continuous phases will be described elsewhere. 16 refs., 7 figs.

• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5546156
• Journal Information: Journal of Computational Physics; (United States), Journal Name: Journal of Computational Physics; (United States) Vol. 107:2; ISSN JCTPAH; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALGORITHMS
BUBBLES
COMPUTER CODES
COMPUTERIZED SIMULATION
D CODES
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FLOW MODELS
FLUID FLOW
HEAT TRANSFER
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION
TWO-PHASE FLOW