Heat transfer and void fraction profiles around a horizontal cylinder immersed in a bubbling fluidised bed

The local void fraction profile around a surface immersed in a fluidised bed has a great importance for the estimation of transport phenomena and chemical reaction rates in these units but it is rarely reported in literature. The scope of this work is to demonstrate that heat transfer measurements c...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2010-08, Vol.53 (17), p.3525-3532
Main Authors: Di Natale, Francesco, Bareschino, Piero, Nigro, Roberto
Format: Article
Language:English
Subjects:
Applied sciences
Bubbling
Chemical engineering
Cylinders
Exact sciences and technology
Fluidised bed
Fluidization
Heat and mass transfer. Packings, plates
Heat transfer
Heat transfer coefficients
Horizontal
Horizontal cylinder
Mass transfer
Mathematical models
Surface void fraction
Void fraction
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Summary:The local void fraction profile around a surface immersed in a fluidised bed has a great importance for the estimation of transport phenomena and chemical reaction rates in these units but it is rarely reported in literature. The scope of this work is to demonstrate that heat transfer measurements can be reliably used to derive the void fraction profile once a proper correlation model is available. To this aim, measurements of local heat transfer coefficient around a horizontal cylinder were performed and the angular void fraction profile was reconstructed with a new heat transfer model. The modeled void fraction profile resulted coherent with experimental and numerical evidences available in literature.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2010.04.013