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...

Abstract The present study aims at characterizing the atomization of a water jet which is injected at high velocity into still air thanks to an industrial nozzle particularly used in irrigation. The nozzle diameter is 4.36 mm and exit velocity is about 25 m/s. The droplet size and velocity are analyzed by a double-pulsed shadowgraph imaging technique using a Droplet Tracking Velocimetry (DTV) m...

Effervescent atomizer produced sprays were studied for application to rotary kiln incinerators. The sprays were characterized by their number averaged droplet velocity profiles, Sauter mean diameter (SMD) profiles, and size-velocity correlations. Spray mass flow rates ranged from 30 to 120 g/s. Air-liquid-ratios by mass (ALRs) were between 2% and 10%. Data were obtained at seven to ten radial p...

This study focusses on investigating the effect of flow orientation global and local two-phase parameters under conditions. Flow visualization, pressure measurement, conductivity probe measurements are performed in a test facility made 50.8 mm inner diameter acrylic pipes with measurement. Characteristics regimes interfacial structures, frictional drop prediction vertical upward downward flows ...

On Demand print-head (SOD) is performed. This work leads us to study (i) fluid structure/interaction with a vibrating tube conveying fluid, assimilated to a cantilever beam excited by a pointwise piezoactuator (PZA) (ii) fluid film instability with spray generation. After establishing a more general equation of the motion of a vibrating tube filled with fluid using Hamilton's modified principle...

Recently, a newly designed type of energy-input extraction column, agitated-pulsed column (APC), has been achieved high mass-transfer efficiency due to the small-size droplets and dispersed-phase holdup. In view lack feasible population-balance-model (PBM) kernel functions in APC, parameter optimization is conducted by simplified PBM method. Then optimized are implemented computational fluid-dy...

We study the flapping instability observed when a liquid jet is incompletely atomized by a fast parallel gas stream: the remaining liquid jet is destabilized over a scale large compared with its radius, and breaks into liquid fragments. We characterize the symmetry of this instability and its frequency. The intact liquid length is measured as a function of gas and liquid velocity, and turns out...