کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
650580 | 1457290 | 2012 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experiments on the two-dimensional flow of a grain-water mixture past a circular cylinder
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present experiments with a mixture of grains and water around a circular cylinder. Flow is driven by the internal cylinder of a Taylor-Couette cell. Velocity measurements of the mixture at the external surface are carried out using a commercial particle image velocimeter. The flow regime is in the macroviscous range and the flow field is similar to that generated by a Newtonian fluid around a circular cylinder, with a wake and a recirculation zone. Like in other granular flows, the velocity covariance tensor and the rate of deformation tensor are not collinear; they have principal axes rotated nearly 45°. Near the body, the velocity scale of the wake decays linearly at high Reynolds numbers and logarithmically at low Reynolds numbers. The transverse length scale increases as xâ²n (xâ² measured along the axis of symmetry with the origin at the boundary of the body) with n<0.5 (or nearly zero in some flow conditions).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 36, NovemberâDecember 2012, Pages 139-151
Journal: European Journal of Mechanics - B/Fluids - Volume 36, NovemberâDecember 2012, Pages 139-151
نویسندگان
Sandro Longo, Alessandro Valiani, Luisfilippo Lanza,