کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10374011 | 878612 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental Analysis of Hydrodynamics in a Jar-test
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Experimental Analysis of Hydrodynamics in a Jar-test Experimental Analysis of Hydrodynamics in a Jar-test](/preview/png/10374011.png)
چکیده انگلیسی
Jar-tests are widely used in industry, in particular in water treatment, for flocculation. They are used to determine the optimal dose of coagulant required to perform flocculation. However, mixing mechanisms in a jar-test are unknown. Different types of motion coexist in the tank: the mean flow (or global circulation), the periodic fluctuations (or trailing vortices) induced by the blade rotation in the impeller region and the turbulent fluctuations (that dissipate the kinetic energy). These three kinds of motion can be estimated by experiments by means of a triple decomposition of the velocity. The dissipation rate of kinetic energy which is the key parameter in flocculation can thus be estimated. The local distribution of dissipation rates around the impeller are discussed and compared with the global power dissipated in the jar. The characteristics of turbulence are analysed and discussed. In particular, the Kolmogorov scale that calibrates the size of the flocs is determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 83, Issue 1, January 2005, Pages 22-30
Journal: Process Safety and Environmental Protection - Volume 83, Issue 1, January 2005, Pages 22-30
نویسندگان
D. Bouyer, R. Escudié, A. Liné,