Numerical Simulation of Two-Phase Flow in an Effervescent.

The main concern of atomization is to have a controllable and uniform spray. In suspension plasma spraying technique, there is a vital demand to produce a uniform and non-pulsating spray. Effervescent atomizers, in which a gas is bubbled into the bulk liquid through an aerator, have shown to be a technological alternative to the conventional atomizers when atomization of liquids with large variety of viscosity and density is required. Thus, understanding the behavior of gas and liquid flow through the nozzle is crucial to predict the condition of outcoming spray. In this study, the two-phase flow inside the effervescent atomizers is numerically modeled. The behavior of liquid film in the discharge passage is investigated using different Gas to Liquid mass flow Ratios (GLR). These numerical results are compared with the experimental data available in literature. The effect of nano-sized solid particles concentration on the liquid film thickness at the exit of the atomizer is studied through the change in liquid bulk density and viscosity.

Sanaz is a research assistant and PhD student at University of Toronto,collaborating with Université de Sherbrooke on modeling large-scale carbon nanotube production.She pursued her MSc studies in the CFD lab at Concordia University_ Montréal. Her M.Sc studies involved the numerical investigation of two-phase flow inside the effervescent atomizers.