Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 57: Posters - Turbulence

DY 57.2: Poster

Donnerstag, 23. März 2017, 17:00–19:30, P1A

Experimental modeling of gas-liquid horizontal jet flows — •Oleksii Barybin — Donetsk National University, 600-Richchya Str., 21, Vinnytsia, 21021, Ukraine

The behavior of gas-liquid turbulent two-phase jets has been substantially studied over many years, due to their fundamental importance in many multiphase systems. Understanding jet performance is crucial for modeling many effects of practical importance. I discuss some specific non-equilibrium processes in two-phase horizontal jets (dispersion of bubbles, development stages, etc.) as well as possibility to apply single-phase buoyant flow models in order to determine geometrical characteristics of the aeration zone in jet aerators. It has been found that for the high initial gas content above 30% the bubbles dispersion is within 2 mm and thus, the device can be considered middle-size bubbled. Growth of the initial gas content in the gas-liquid jet above 30-35% results in the formation of very large bubbles with diameter above 5 cm. I have compared the proposed and experimentally verified physical model of the horizontal gas-liquid jet with those for buoyant single-phase jets with low (less than 10 %) gas content, obtained an additional stage of the process development, the stage of a single-phase flow with a residual fluid movement without bubbles, and defined specific similarity number.