Journal ArticleDOI
Liquid volume flux in a weak bubble plume
A. M. Leitch,W. D. Baines +1 more
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In this paper, a method for measuring the volume flux in a bubble plume in a homogeneous liquid has been devised, where the flux is proportional to the square root of air flow and increases linearly with height.Abstract:
A method has been devised for measuring the volume flux in a bubble plume in a homogeneous liquid. Laboratory experiments on weak bubble plumes using the method determined the flux as a function of height and gas flow rate for air flow rates between 0.41 and 6.25 cc/s. It was found that volume flux was proportional to the square-root of air flow and increased linearly with height. From measurement of bubble velocity it is concluded that the individual bubble wakes make an important contribution to the entrainment.read more
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Bubble Plume Modeling for Lake Restoration
TL;DR: In this paper, a steady bubble plume model is developed to describe a weak air (or oxygen) bubble injection system used for the restoration of deep stratified lakes, where the model is designed for two modes of operation, i.e., oxygenation and artificial mixing.
Journal ArticleDOI
Multi-phase plumes in uniform and stratified crossflow
TL;DR: In this article, an empirical relationship for multiphase plumes in uniform and stratified crossflows is presented, where the entrained fluid separates from the dominant dispersed phase, and the bubble column follows the trajectory of the vector sum of u s and u ∞.
Journal ArticleDOI
Modeling the release of CO2 in the deep ocean
TL;DR: In this paper, a comprehensive plume model was developed to simulate the dynamic, near-field behavior of CO2 released in the water column as either a buoyant liquid or vapor.
Journal ArticleDOI
Role of Slip Velocity in the Behavior of Stratified Multiphase Plumes
TL;DR: In this paper, the authors present direct measurements of multiphase plumes in stratification and correlate characteristic plume properties with the non-dimensional slip velocity UN, defined as the ratio of the bubble slip velocity us to a characteristic plumes fluid rise velocity (BN) 1∕4 ; B is the total kinematic buoyancy flux, and N is the buoyancy frequency.
Journal ArticleDOI
Similarity considerations for non-Boussinesq plumes in an unstratified environment
G. G. Rooney,Paul Linden +1 more
TL;DR: In this article, the similarity form of a non-Boussinesq gaseous plume was developed by obtaining the equation for the conservation of enthalpy flux, and using it and the continuity equation to demonstrate that the flux of density deficiency is conserved, and not the flux flux of buoyancy as is the case for Boussineq plumes.
References
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Journal ArticleDOI
Turbulent gravitational convection from maintained and instantaneous sources
TL;DR: In this article, the authors developed a theory of convection from maintained and instantaneous sources of buoyancy, using methods which are applicable to stratified body fluids with any variation of density with height; detailed solutions have been presented for the case of a stably stratified fluid with a linear density gradient.
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Turbulent entrainment: the development of the entrainment assumption, and its application to geophysical flows
TL;DR: The entrainment assumption, relating the inflow velocity to the local mean velocity of a turbulent flow, has been used successfully to describe natural phenomena over a wide range of scales as mentioned in this paper.
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Diffusion of Submerged Jets
TL;DR: As the direct result of turbulence generated at the borders of a submerged jet, the fluid within the jet will undergo both lateral diffusion and deceleration, and at the same time fluid from the su...
Journal ArticleDOI
Turbulent buoyant convection from a source in a confined region
W. D. Baines,J. S. Turner +1 more
TL;DR: In this article, the effect of continuous convection from small sources of buoyancy on the properties of the environment when the region of interest is bounded is considered, assuming that the entrainment into the turbulent buoyant region is at a rate proportional to the local mean upward velocity, and that the buoyant elements spread out at the top of the region and become part of the non-turbulent environment at that level.