کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8050664 1519359 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Análisis numérico de la hidrodinámica y la transferencia de calor del flujo gas-sólidos en dos configuraciones de salida de un riser industrial usando la teoría meso-escala para predecir el arrastre interfacial
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Análisis numérico de la hidrodinámica y la transferencia de calor del flujo gas-sólidos en dos configuraciones de salida de un riser industrial usando la teoría meso-escala para predecir el arrastre interfacial
چکیده انگلیسی
In the FCC process two configurations riser are numerically analyzed varying the upper outlet orientation using a 2 D CFD model which includes the Two Fluid Model (TFM), Kinetic Theory of Granular Flow (KTGF), and Energy Minimization Multi-Scale (EMMS) theory as drag model. This model is solved using the ANSYS Fluent® 14.5 software, solving the governing equations of mass, momentum, and energy balance; and the constitutive equations to calculate interfacial interaction, wall-solid phase interaction, and granular phase properties. The model proposed in this work properly predicts the gas-solid flow behavior, predicting different solid flow patterns in radial and axial riser directions, as well as concentrated and diluted zones at riser's top and bottom respectively. The radial and axial solids concentration and velocities profiles fluctuations observed are produced by the high radial solid mix which is higher near the riser walls due to drag force considered by the model used. On the other hand, a rapid radial and axial thermal stabilization is observed reaching the steady state rapidly. The profiles obtained from riser configurations analyzed are very similar, so in future works other riser outlets configurations will be analyzed to try to improve the solid concentration and velocity profiles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería - Volume 33, Issues 3–4, July–December 2017, Pages 155-163
نویسندگان
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