کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
621901 882587 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A study on the two-phase flow in a stirred tank reactor agitated by a gas-inducing turbine
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
A study on the two-phase flow in a stirred tank reactor agitated by a gas-inducing turbine
چکیده انگلیسی

Experimental and numerical studies of a gas–liquid two-phase flow have been applied to a non-baffled laboratory-scale stirred tank reactor, mechanically agitated by a gas-inducing turbine. The dispersion of air as gas phase into isopropanol as liquid phase at room temperature under different stirrer speeds was investigated. The X-ray cone beam computed tomography (CBCT) measurements have been taken at five different stirrer speeds starting from 1000 rpm at which the gas inducement occurs for the given operating conditions. The considerable difficulties in acquiring the phase distribution due to beam hardening and radiation scattering effects have been overcome by developing a suitable measurement setup as well as by calibration and software correction methods to achieve high accuracy. The computational fluid dynamics analyses of the stirred tank reactor have been performed in 3D with CFX 10.0 numerical software. The simplified numerical setup of mono-dispersed bubbles, constant drag coefficient and the k–ɛ turbulence model was able to capture both the bubble induction and dispersion and the free surface vortex formation. Despite the assumed simplifications, the numerical predictions exhibit a good agreement with the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 86, Issue 1, January 2008, Pages 75–81
نویسندگان
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