Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL STUDIES ON AIR BUBBLE PLUMES IN CROSSFLOW
Submission Author:
Douglas de Almeida Garcia , RJ
Co-Authors:
Maria Helena Farias, Alessandra Santos, Samuel Araújo, Lucas Factor , Phillype de Lima Massari
Presenter: Douglas de Almeida Garcia
doi://10.26678/ABCM.ENCIT2016.CIT2016-0684
Abstract
Air bubble plumes and jets often are found in several industrial, technological and natural processes. Mixing of buoyancy, momentum and meandering effects are present in such flows. Due to the complexity of this flows, both experimental and theoretical investigations on the entrainment process are needed for improving the phenomena comprehension. In the present work, the hydrodynamics of air bubble plumes in crossflow inside an open water channel is discussed. Experimental studies were performed in the Circulating Water Channel of the Brazilian National Institute of Metrology, Quality and Technology-Inmetro. Single and multiple air injection nozzles were placed tangent to the water channel bottom surface, crossing the channel longitudinal axis. Particle Image Velocimetry technique was used for flow visualization and velocity field measurement. Velocity profile disturbances within the boundary layer, due to air injection, were analized. Furthermore, it was evaluated the plume bending and the fluid velocity behavior in different zones of the flow which is affected by the plume.
Keywords
Air bubble plumes, Plumes and jets in crossflow, Particle image velocimetry
