Average Bubble Diameter, Slip Velocity and Gas Hold. up of Bubble Swarms

Investigation of Gas Hold-up and Bubble Behavior in a Split-Cylinder Airlift Reactor: Pseudo-Plastic Non-Newtonian Fluids

Gas hold-up and bubble diameters in a gassed oscillatory ba'ed column

In this paper attempts are made to address how bubble behaviour in a batch oscillatory ba'ed column (OBC) contributes to the overall measured enhancement in mass transfer. A CCD camera is used to measure the bubble size distribution and the gas hold-up in the OBC. The experimental results of Sauter mean diameter and gas hold-up are correlated as a function of the power dissipation and super5cia...

Velocity of Electroweak Bubble Walls

We study the velocity of bubble walls in the electroweak phase transition. For several extensions of the Standard Model, we estimate the friction and calculate the wall velocity, taking into account the hydrodynamics. We find that deflagrations are generally more likely than detonations. Nevertheless, for models with extra bosons, which give a strongly first-order phase transition, the deflagra...

Collapse and Rebound of a Gas Bubble

In this paper, we study the collapse and rebound of a gas bubble. Our goals are twofold: (1) we want to stress that different mathematical models may lead to extremely different results and (2) we introduce a new class of simplified reliable models. We accomplish our first goal by showing that the results obtained from two of the simplest and most widely used models (the isothermal and adiabati...

CFD-DEM Investigation on van der Waals Force in Gas-Solid Bubbling Fluidized Beds

Effect of interparticle force on the hydrodynamics of gas-solid fluidized beds was investigated using the combined method of computational fluid dynamics and discrete element method (CFD-DEM). The cohesive force between particles was considered to follow the van der Waals equation form. The model was validated by experimental results from literature in terms of bed voidage distribution and Eule...