Effects of confinement on bubble dynamics in a square duct

Research output: Contribution to journalArticle

Abstract

In this paper, we simulate the effects of confinement on three-dimensional bubble dynamics in a square duct. A systematic study of three confinement ratios, four Bond numbers and two Morton numbers has been conducted. A GPU implemented VOF numerical algorithm on a Cartesian collocated grid with an improved method to handle the surface tension force has been developed. A three-dimensional geometry construction method with a piecewise linear interpolation scheme for approximating the interface segments is used to compute the interface shape and liquid volume flux from the cell faces. The Navier-Stokes equations are solved with a space-time second-order accurate fractional step numerical scheme. The surface tension force is treated as a pressure gradient and an additional Poisson equation is solved. Transient and steady state bubble deformations, rise velocities and aspect ratios are presented.

Original language English (US) 32-47 16 International Journal of Multiphase Flow 77 https://doi.org/10.1016/j.ijmultiphaseflow.2015.06.014 Published - Dec 1 2015

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ducts
Ducts
Surface tension
interfacial tension
bubbles
Bond number
Poisson equation
Navier-Stokes equation
Navier Stokes equations
Interfaces (computer)
interpolation
aspect ratio
Aspect ratio
Interpolation
grids
Fluxes
Geometry
Liquids

Keywords

• Bubble dynamics
• Confinement
• Gas-liquid flows
• Square duct
• VOF

ASJC Scopus subject areas

• Mechanical Engineering
• Physics and Astronomy(all)
• Fluid Flow and Transfer Processes

Cite this

In: International Journal of Multiphase Flow, Vol. 77, 01.12.2015, p. 32-47.

Research output: Contribution to journalArticle

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