Numerical and physical modelling of bubbly flow phenomena

Technical Report · Wed Feb 28 23:00:00 EST 1990

DOI:https://doi.org/10.2172/7200325· OSTI ID:7200325

Prosperetti, A ^[1]; Sangani, A S ^[2]

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1. Johns Hopkins Univ., Baltimore, MD (USA)
2. Syracuse Univ. Research Inst., NY (USA). Dept. of Chemical Engineering

The ulitmate purpose of this study is to put the widely used engineering averaged-equations models of multi-phase flows on a firmer footing by comparing their results with those of direct numerical multi-particle simulations and rigorously-derived averaged equations. Since the averaged-equations models are comparatively well developed, in the first year of this project we have focused on the multi-particle simulation and ensemble averaging techniques. This report describes the progress to date on the several problems that are being studied. The first problem addresses the derivation of ensemble-averaged equations for the propagation of pressure waves in bubbly liquids. The result is in the form of an expansion for small gas volume fraction. Previously known results are recovered at first order and in certain limits at higher order. However, a new insight into the structure of the expansion and the role of bubble-bubble interaction and surface deformations is obtained from this work. 10 refs., 2 figs.

• Research Organization: Johns Hopkins Univ., Baltimore, MD (USA); Syracuse Univ. Research Inst., NY (USA). Dept. of Chemical Engineering
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-89ER14043
• OSTI ID: 7200325
• Report Number(s): DOE/ER/14043-1; ON: DE90009837
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACCELERATION
ADIABATIC PROCESSES
BUBBLES
COMPARATIVE EVALUATIONS
DEFORMATION
DRAG
FLOW MODELS
FLUID FLOW
INTERACTIONS
MASS TRANSFER
MATHEMATICAL MODELS
MULTIPHASE FLOW
NOZZLES
OSCILLATIONS
PRESSURE EFFECTS
RANDOMNESS
RESONANCE
SOUND WAVES
SURFACE PROPERTIES
SURFACE TENSION
TEMPERATURE EFFECTS
TESTING
VALIDATION
VISCOSITY
VOLUME
WAVE PROPAGATION
WAVELENGTHS