Journal ArticleDOI
Gas bubbles bursting at a free surface
J. M. Boulton-Stone,John Blake +1 more
TLDR
In this article, the free-surface motion following a small air bubble burst at an equilibrium position at an air/water interface is modelled numerically using a boundary integral method.Abstract:
When a small air bubble bursts from an equilibrium position at an air/water interface, a complex motion ensues resulting in the production of a high-speed liquid jet. This free-surface motion following the burst is modelled numerically using a boundary integral method. Jet formation and liquid entrainment rates from jet breakup into drops are calculated and compared with existing experimental evidence. In order to investigate viscous effects, a boundary layer is included in the calculations by employing a time-stepping technique which allows the boundary mesh to remain orthogonal to the surface. This allows an approximation of the vorticity development in the region of boundary-layer separation during jet formation. Calculated values of pressure and energy dissipation rates in the fluid indicate a violent motion, particularly for smaller bubbles. This has important implications for the biological industry where animal cells in bioreactors have been found to be killed by the presence of small bubbles.read more
Citations
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Journal ArticleDOI
Direct numerical simulation of free-surface and interfacial flow
TL;DR: In this paper, the authors consider the formation of droplet clouds or sprays that subsequently burn in combustion chambers, which is caused by interfacial instabilities, such as the Kelvin-Helmholtz instability.
Journal ArticleDOI
A Coupled Level Set and Volume-of-Fluid Method for Computing 3D and Axisymmetric Incompressible Two-Phase Flows
TL;DR: In this article, a coupled level set/volume-of-fluid (CLSVOF) method was proposed for computing 3D and axisymmetric incompressible two-phase flows.
Journal ArticleDOI
An improved level set method for incompressible two-phase flows
TL;DR: A level set method for capturing the interface between two fluids is combined with a variable density projection method to allow for computation of a two-phase flow where the interface can merge/break and the flow can have a high Reynolds number.
Journal ArticleDOI
An Adaptive Level Set Approach for Incompressible Two-Phase Flows
TL;DR: This work couple the level set scheme to an adaptive projection method for the incompressible Navier?Stokes equations, in order to achieve higher resolution of the free surface with a minimum of additional expense.
Book
Sea Salt Aerosol Production: Mechanisms, Methods, Measurements, and Models - A Critical Review
TL;DR: In this paper, Sea salt aerosol (SSA) particles interact with other atmospheric gaseous and aerosol constituents by acting as sinks for condensable gases and suppressing new particle formation, thus influencing the size distribution of other aerosols and more broadly influencing the geochemical cycles of substances with which they interact.
References
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Journal ArticleDOI
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The boundary layer on a spherical gas bubble
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Comments on a Ruptured Soap Film
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Journal ArticleDOI
Damage mechanisms of suspended animal cells in agitated bioreactors with and without bubble entrainment.
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