Pressure forces in disperse two-phase flow

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Int. J. Multiphase Flow; (United States)

DOI:https://doi.org/10.1016/0301-9322(84)90054-5· OSTI ID:5101829

Prosperetti, A; Jones, A V

A mathematical model for the description of pressure forces in averaged two-phase flow equations for disperse fluid-fluid and solid-fluid flows is obtained. The currently used engineering treatment is compared with this model and is found to be adequate when the pressure near the particles, bubbles or droplets is not very different from the volume-average pressure. In the case where large velocity differences exist between the phases or, in bubbly flow, when the bubbles undergo rapid growth or collapse, the engineering treatment is insufficient. The role of the pressure field of the continuous phase in the momentum equation of the disperse phase is also clarified. Finally, the model is extended to include viscous forces.)

• Research Organization: Istituto di Fisica, Universita di Milano, Milan
• OSTI ID: 5101829
• Journal Information: Int. J. Multiphase Flow; (United States), Journal Name: Int. J. Multiphase Flow; (United States) Vol. 10:4; ISSN IJMFB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BUBBLE GROWTH
BUBBLES
COMPRESSIBLE FLOW
DIFFERENTIAL EQUATIONS
DISPERSIONS
DROPLETS
EQUATIONS
EQUATIONS OF MOTION
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
HYDRAULICS
MATHEMATICAL MODELS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLES
PRESSURE EFFECTS
TWO-PHASE FLOW
VISCOUS FLOW