NDLI: A Particle-Center-Averaged Two-Fluid Model for Wall-Bounded Bubbly Flows

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Axel, E. Larreteguy Donald, A. Drew Richard, T. Lahey
Copyright Year	2002
Abstract	The accurate prediction of void fraction profiles near solid walls using the two-fluid model is still an unresolved issue. These profiles result from the combination of two factors: a) forces acting on the bubbles, and, b) geometric constraints imposed by their shape. We propose herein a two-fluid model that involves a particle-center-averaging procedure for the disperse phase, and a reinterpretation and postprocessing of the results obtained. This center-averaged approach averages the disperse phase (bubbles) based on a particle center indicator function, while using the standard phase indicator averaging for the continuous phase (liquid). The solution fields obtained are then postprocessed to introduce the geometry of the bubbles in order to recover the values that should be representative of measured fields. The key idea here is to separate the geometric aspect from the dynamic aspect of the problem into two independent, successive steps. The new model may be easily incorporated into existing two-fluid model codes. Results obtained with the new model showing agreement with experimental data (Moursali et al, 1995) are also presented.
Sponsorship	Fluids Engineering Division
Starting Page	303
Ending Page	318
Page Count	16
File Format	PDF
ISBN	0791836169
DOI	10.1115/FEDSM2002-31212
e-ISBN	0791836002
Volume Number	Volume 2: Symposia and General Papers, Parts A and B
Conference Proceedings	ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
Language	English
Publisher Date	2002-07-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Geometry Fluids Bubbles Bubbly flow Particulate matter Porosity Shapes
Content Type	Text
Resource Type	Article

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