کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
659959 1458106 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of macro- and micromixing in confined flows of reactive fluids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Development of macro- and micromixing in confined flows of reactive fluids
چکیده انگلیسی
Simultaneous development of macro- and micromixing in confined axis-symmetric reacting flows has been determined experimentally. Mixing of aqueous solutions of acid (internal jet) and base (coflow) with the coflow-to-jet flow rate ratio Q=V˙c/V˙j=5.0, at which the velocity at the jet exit was higher than the co-flow one, was examined in a co-axial jet mixer. The two-color PLIF method was used: the dyes - sodium fluorescein and rhodamin B - were premixed to the jet. The reaction product concentration or molecular mixing was determined by measuring the radiated light intensity of sodium fluorescein. The fluorescence of rhodamin B highlighted turbulent transfer by vortices or mixture fraction development. Variations of reactant concentrations were calculated using the mass conservation equation and the simultaneously measured distributions of mixture fraction and chemical reaction product concentration. The analysis of mixing parameters showed a significant difference in the dynamics of turbulent and molecular mixing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 54, Issues 15–16, July 2011, Pages 3245-3255
نویسندگان
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