Digital image analysis measurements of bed expansion and segregation dynamics in dense gas-fluidized beds
Goldschmidt, M.J.V. and Link, J.M. and Mellema, S. and Kuipers, J.A.M. (2003) Digital image analysis measurements of bed expansion and segregation dynamics in dense gas-fluidized beds. Powder Technology, 138 (2-3). pp. 135-159. ISSN 0032-5910
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|Abstract:||One of the most crucial steps in the development of fundamental hydrodynamic models is the validation of these models with accurate, detailed experimental data. Therefore a whole-field, non-intrusive digital image analysis technique has been developed which enables measurement of bed expansion and segregation dynamics of coloured particles in dense gas-fluidised beds. The development, calibration and accuracy of the technique are discussed in detail. The image analysis technique traces bubbles and voidage waves accurately, whereas the mixture composition in a fluidised bed could be determined within 10%.
Experiments have been carried out with 1.5 and 2.5 mm coloured glass beads, for which particle¿particle and particle¿wall collision parameters were accurately known. They were performed in pseudo two-dimensional laboratory scale fluidised beds with a simple rectangular geometry and well-defined gas inflow conditions. An extensive set of results obtained with both mono-disperse systems and binary mixtures, suitable for validation of fundamental hydrodynamic models, is presented.
|Copyright:||© 2003 Elsevier B.V.|
|Link to this item:||http://purl.utwente.nl/publications/40854|
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