While the processes taking place in a bubble reactor are simple to describe in a few sentences it is much more difficult to give a physical description that is useful for engineering purposes. A better understanding of a cluster of bubbles dissolving in a liquid where the species transferred reacts with other dissolved species is an interesting engineering challenge that could result in simplif...

At plunging breakers, air bubbles are entrained at the impingement of the water jet, formed at the top of the wave, with the water free surface in front. During the present study, air bubble entrainment at a pseudo-plunging breaker was investigated at near full-scale and further experimental work studied the bubble detrainment process. Experimental observations included the generation and propa...

The rapid increase in home prices over the past several years has raised concerns about the existence of a speculative bubble in this asset market. A closely related concern—irrespective of any existing bubble—is whether home prices are susceptible to a steep decline that could have a severe impact on the broader economy. Indeed, home prices have been rising rapidly. Since 1995, real home price...

This work presents a numerical study of the simulation bi-phasic flow for bubble rising in viscous liquid. A 2D model is employed via Smoothed Particle Hydrodynamics (SPH). The liquid/bubble capillary interaction must be taken into account, implementing adequate properties density, viscosity, and surface tension at interface. Likewise, results are evaluated with experimental measurements from l...

People have long been fascinated by bubbles and foams dynamics, and since the pioneer work of Leonardo da Vinci in the early 16th century, this subject has generated a huge bibliography. However, only very recently, much interest was devoted to bubbles in champagne wines [1]. Small bubbles rising through the liquid, as well as a bubble ring (the so-called collar) at the periphery of a flute pou...

An Eulerian-Lagrangian approach is developed for the simulation of turbulent bubbly flows in complex systems. The liquid phase is treated as a continuum and the Navier-Stokes equations are solved in an unstructured grid, finite volume framework for turbulent flows. The dynamics of the disperse phase is modeled in a Lagrangian frame and includes models for motion of each individual bubble, bubbl...

Alkaline water electrolysis has the advantage of scalability for industrial-scale mass production hydrogen; however, it is operated under a lower current density than other methods because high overpotential resulting from ion transport limitations will occur at density. Bubble dynamics can both prevent by its existence and accelerate bubble-induced flow. In this study, we conduct three-dimensi...

The amount of methane bubbles rising from the bottom of Lake Kinneret was quantified by using a dual-beam echo sounder. Both echo-counting (EC) and echo integration (EI) techniques were implemented. Bubbles can confound the identification of fish targets because their acoustic sizes strongly overlap. Analysis of vertical changes in densities in the anoxic hypolimnion (with no fish) indicated th...

We investigate how the walls of cylindrical capillaries affect velocity rising gas bubbles various diameters. Of course, as capillary diameter increases, bubble will approach case free rising. Such systematic experiments on rise in capillaries, which ratio and is varied from one towards smaller values, can hardly be found literature. Experiments within system water/air have been conducted stagn...