Settling/rising of a foreign particle in solid-liquid fluidized beds: Application of dynamic mesh technique

Show simple item record Ghatage, Swapnil V. Khan, Md. Shakhaoath Peng, Zhengbiao Doroodchi, Elham Moghtaderi, Behdad Padhiyar, Nitin Joshi, Jyeshtharaj B. Evans, Geoffrey M. 2017-03-07T07:00:23Z 2017-03-07T07:00:23Z 2017-10
dc.identifier.citation Ghatage, Swapnil V.; Khan, Md. Shakhaoath; Peng, Zhengbiao; Doroodchi, Elham; Moghtaderi, Behdad; Padhiyar, Nitin; Joshi, Jyeshtharaj B. and Evans, G. M., “Settling/rising of a foreign particle in solid-liquid fluidized beds: Application of dynamic mesh technique”, Chemical Engineering Science, DOI: 10.1016/j.ces.2017.01.064, Oct. 2017. en_US
dc.identifier.issn 0009-2509
dc.identifier.issn 1873-4405
dc.description.abstract The modeling of moving objects has been the focus of many studies and has succeeded to attract sufficient attention by researchers. However, commonly used modeling approaches such as discrete element modeling (DEM), direct numerical simulations (DNS) lack simplicity and have been computationally intensive. In the present work, simple method of dynamic mesh in the framework of computational fluid dynamics has been employed. Eulerian-Eulerian simulations of a monodisperse solid-liquid fluidized bed (SLFB) have been carried out. A foreign particle (settling particle or rising bubble) was inserted in the system to study the effect of turbulence in SLFB on the motion of settling particle. The operating and geometrical parameters have been chosen based on the experiments performed by Ghatage et al. (2013). The results showed that the model can satisfactorily predict the settling velocity for low voidage fluidization in 2D as well as 3D simulations. Computational fluid dynamics (CFD) simulations at higher values of superficial liquid velocity showed liquid bubbles confirming the transition to heterogeneous regime. These liquid bubbles directed the settling particle to move zig-zag resulting in lower settling velocity. The size and number of the bubbles increase with an increase in the liquids velocity indicating increased heterogeneity. However, CFD predicted larger and higher number of bubbles than experimentally noted. This resulted in an increase in the deviation of predicted settling velocities from experimentally observed with an increase in superficial liquid velocity. In case of bubbles, it was observed that the dynamic mesh method is greatly dependent on the regime of operation in the column and works only in the range of low voidage when the fluidized bed is homogeneous and does not contain liquid bubbles. en_US
dc.description.statementofresponsibility by Swapnil V. Ghatage, Md. Shakhaoath Khan, Zhengbiao Peng, Elham Doroodchi, Behdad Moghtaderi, Nitin Padhiyar, Jyeshtharaj B. Joshi and G. M. Evans
dc.format.extent Vol. 170, issue 12, pp. 139-153
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Fluidization en_US
dc.subject Moving object en_US
dc.subject Settling en_US
dc.subject Rising bubble en_US
dc.subject Classification velocity en_US
dc.subject Dynamic mesh en_US
dc.title Settling/rising of a foreign particle in solid-liquid fluidized beds: Application of dynamic mesh technique en_US
dc.type Article en_US
dc.relation.journal Chemical Engineering Science

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


My Account