We study the topology and geometry of two-dimensional coarsening foam with an arbitrary liquid fraction. To interpolate between the dry limit described by von Neumann's law and the wet limit described by Marqusee's equation, the relevant bubble characteristics are the Plateau border radius and a new variable: the effective number of sides. We propose an equation for the individual bubble growth...

Based on the volume of fluid method (VOF), rising characteristics bubbles in near-wall static water are studied. In this study, influence wall motion bubble was studied by changing distance wall, diameter bubble, arrangement and size ratio, etc. The is expressed as average swing amplitude “Z”-shaped when rises. study found that case a single surface has certain rise its degree affected diameter...

Knowledge of the kinetics of gas bubble formation and evolution under cavitation conditions in molten alloys is important for the control casting defects such as porosity and dissolved hydrogen. Using in situ synchrotron X-ray radiography, we studied the dynamic behaviour of ultrasonic cavitation gas bubbles in a molten Al-10 wt%Cu alloy. The size distribution, average radius and growth rate of...

In this paper, modelling gas–liquid bubbly flows is achieved by the introduction of a population balance equation combined with the three-dimensional two-fluid model. For gas–liquid bubbly flows without heat and mass transfer, an average bubble number density transport equation has been incorporated in the commercial code CFX5.7 to better describe the temporal and spatial evolution of the geome...

The hydrodynamics, viz. the solids circulation patterns and bubble behavior, of a freely bubbling gas-solid fluidized bed has been investigated experimentally using Particle Image Velocimetry (PIV) combined with Digital Image Analysis (DIA). Coupling of these non-invasive measuring techniques allows us to obtain information on both the bubble behavior and emulsion phase circulation patterns sim...

Abstract This paper investigates the growth dynamics of a vapor-gas bubble pressed against heating plate by buoyancy force. The shadow method was used to capture images, which were then automatically processed calculate size bubble. As expected, significantly depends on power. It found that ratio diameter height increases as it grows.