Characterizing jetting in an acoustic fluidized bed using X-ray computed tomography

David R. Escudero, Theodore J. Heindel

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

Understanding the jetting phenomena near the gas distributor plate in a fluidized bed is important to gas-solids mixing, heat and mass transfer, and erosion on any bed internals, which can all affect the performance of the bed. Moreover, acoustic vibration in a fluidized bed can be used to enhance the fluidization quality of particulate matter. Characterizing the jetting structure using X-ray computed tomography in a 3D fluidized bed, with and without acoustic intervention, is completed in this study. A 10.2 cm ID fluidized bed filled with glass beads, with material density of 2500 kg/m3 and particles sizes ranging between 212-600 μm, is used in these experiments. X-ray computed tomography (CT) imaging is used to determine local time-average gas holdup. From this information, qualitative characteristics of the hydrodynamic structure of the multiphase flow system are determined. Local time-average gas holdup images of the fluidized bed under acoustic intervention at a high superficial gas velocity show that jets produced near the aeration plate merge with other jets at a higher axial position of the bed compared to the no acoustic condition. Acoustic fluidized beds also have a fewer number of active jets than the no acoustic fluidized bed, which allowed for a more homogeneous gas holdup region deep into the bed. Hence, the acoustic presence has a significant effect on the jetting phenomena near the distributor plate of the fluidized bed.

Idioma originalInglés
Título de la publicación alojadaSymposia
Subtítulo de la publicación alojadaFundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes
EditorialAmerican Society of Mechanical Engineers (ASME)
ISBN (versión digital)9780791846230
DOI
EstadoPublicada - 2014
Publicado de forma externa
EventoASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels - Chicago, Estados Unidos
Duración: 3 ago. 20147 ago. 2014

Serie de la publicación

NombreAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
Volumen1C
ISSN (versión impresa)0888-8116

Conferencia

ConferenciaASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels
País/TerritorioEstados Unidos
CiudadChicago
Período3/08/147/08/14

Huella

Profundice en los temas de investigación de 'Characterizing jetting in an acoustic fluidized bed using X-ray computed tomography'. En conjunto forman una huella única.

Citar esto