کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
239249 465807 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A modified Richardson–Zaki equation for fluidization of Geldart B magnetic particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A modified Richardson–Zaki equation for fluidization of Geldart B magnetic particles
چکیده انگلیسی

Gas bubbles are suppressed in fluidized beds of Geldart B magnetic particles when a homogenous magnetic field is applied due to the formation of straight-chain aggregates. Expansion of the non-bubbling bed depends on the orientation of the applied field with respect to gas flow. Hindered bed expansion is reported for axial fields, whereas enhanced expansion is observed for transversal fields. In the present paper we propose a modified Richardson–Zaki equation that takes into account aggregation and chain orientation to describe bed expansion as the gas flow is increased. The only free parameter in this equation is the chain length, that is directly related to the field intensity through a magnetic granular Bond number, defined as the ratio of magnetic to gravitational energy per unit volume. Results from the proposed model are successfully compared with published data in the literature.

Gas bubbles are suppressed in fluidized beds of magnetic particles when a strong magnetic field is externally applied. We propose a Richardson–Zaki equation that takes into account particle aggregation and chain orientation. The only free parameter is chain length N, which is related to field intensity through a magnetic Bond number. Results are compared with published data in the literature.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 181, Issue 3, 12 February 2008, Pages 347–350
نویسندگان
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