Particle-fluid two-phase flow modeling

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:6098708

Trapp, J A ^[1]; Mortensen, G A ^[2]; Ransom, V H ^[3]

---

1. Colorado Univ., Denver, CO (USA)
2. EG and G Idaho, Inc., Idaho Falls, ID (USA)
3. Purdue Univ., Lafayette, IN (USA)

The present state-of-the-art models in two-phase flow (e.g., RELAP5, TRAC, etc.) are based on the fully-averaged two-fluid concept. This paper describes a new particle-fluid model that is intermediate between the numerically intractable local instant description and the fully-averaged two-fluid model. This new model uses a Lagrangian description for the dispersed phases, bubbles and droplets, and an Eulerian description for the continuous phases, liquid and vapor. The model described in this paper is limited to dispersed bubbles in a continuous phase. Plans are to expand the model to include two dispersed phases and two continuous phases. Interaction between each dispersed phase and its surrounding continuous phase takes place through void fraction coupling as well as interface mass, momentum, and energy transfer. Fully-averaged two-fluid models use correlations for determining flow regime transitions. One motivation for this particle-fluid model is to be able to predict these flow regime transitions as well as being able to use more mechanistic models for dispersed phase coalescence, breakup, wakes, etc. Graphical results from a subcooled boiling stream-water simulation using the particle-fluid model are shown. Currently, this subcooled boiling simulation as well as air-water and liquid-vapor Freon simulations are being compared with experimental data. 8 refs., 1 fig.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6098708
• Report Number(s): EGG-M-90413; CONF-910414--29; ON: DE91010102
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
BUBBLES
DIFFERENTIAL EQUATIONS
EQUATIONS
FLOW MODELS
FLUID FLOW
FLUIDS
GASES
LAGRANGE EQUATIONS
LIQUIDS
MASS TRANSFER
MATHEMATICAL MODELS
MOMENTUM TRANSFER
NAVIER-STOKES EQUATIONS
PARTIAL DIFFERENTIAL EQUATIONS
TWO-PHASE FLOW
VAPORS