کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
239236 465807 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vane rheology of cohesionless glass beads
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Vane rheology of cohesionless glass beads
چکیده انگلیسی

The rheology of a single coarse granular powder has been studied with shear vane rotational viscometry. The torque required to maintain constant rotation of a vane tool in a loose bed of glass beads (with a mean particle size of 203 μm) is measured as a function of vane immersion depth and rotational speed. The resulting torque profiles exhibit both Coulombic behavior at low rotational rates and fluid-like, collisional behavior at high rotational rates. Analyzing vane shaft and end effects allows the flow dynamics at the cylindrical and top and bottom disk surfaces of vane rotation to be determined. Disk surfaces show a uniform torque profile consistent with Coulombic friction over most of the rotational rates studied. In contrast, cylindrical surfaces show both frictional and collisional torque contributions, with significant dynamic torque increases at deep immersion depths and fast vane rotation.

The rheology of a single coarse granular powder has been studied with shear vane rotational viscometry. Analysis of vane shaft and end effects allows determination the flow dynamics at the cylindrical, top, and bottom surfaces of vane rotation.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 181, Issue 3, 12 February 2008, Pages 237–248
نویسندگان
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