کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10385272 | 882589 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Torque Measurements in Aerated Powders Using a Mechanically Stirred Fluidized Bed Rheometer (msFBR)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This paper reports on a study of the flow properties of two aerated/fluidized granular materials by means of torque measurements using a mechanically stirred fluidized bed rheometer (msFBR). The paper presents the experimental procedures developed to test two different materials below the minimum fluidization condition and when the powders are just fluidized. The dependency of the torque measurements upon impeller speed and stirring time was analysed. The effect of changing rate of aeration and impeller depth in the bed was also systematically investigated. Results reported here were obtained on an alumina powder and on ballotini belonging to Geldart group A and B respectively. Below minimum fluidization, the torque profiles obtained for both powders were independent of impeller speed. With increasing impeller depth the torque profiles resembled the normal stress profiles in silos. At minimum fluidization condition, the torque was found to be dependent on the impeller speed and found to increase linearly with increasing impeller depth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 83, Issue 11, November 2005, Pages 1311-1318
Journal: Chemical Engineering Research and Design - Volume 83, Issue 11, November 2005, Pages 1311-1318
نویسندگان
G. Bruni, A. Colafigli, P. Lettieri, T. Elson,