مهندسی شیمی ایران

مهندسی شیمی ایران

کاربرد روش شبیه سازی گردابه های بزرگ در بررسی عددی جریان متلاطم در تانک های همزن دار

نوع مقاله : مقاله مروری

نویسندگان
دانشکده مهندسی شیمی، دانشگاه صنعتی امیرکبیر
چکیده
فرایند اختلاط، با هدف تولید محصولات باکیفیت و یکنواخت یکیاز فرایندهای مهم مهندسی شیمی محسوبمی ­شود. فرایند اختلاط، معمولاً در تانک­ های همزن­ دار انجاممی ­شود. حرکت همزن در تانک­ های همزندار جریان متلاطم پیچیده ­ای ایجادمی­ کند. شبیه ­سازی چنین جریانی بسیار دشوار و چالشبرانگیز است. به ­طور کلی، بررسی و مطالعۀ عددی جریان­ های متلاطم بااستفادهاز سه روش شبیه‌سازی عددی مستقیم، شبیهسازی گردابه ­های بزرگ و متوسط­ گیری رینولدز معادلات نویر- استوکس انجاممی­ شود.
روش شبیه ­سازی گردابه­ های بزرگ ازنظر دقت و هزینۀ محاسباتی، بین دو روش دیگر قرارگرفته
و با پیشرفت توان محاسباتی در سال­های اخیر بسیار جلب توجه کرده‌است. در این مقاله، به مرور پژوهش­های انجامشده بر تانک­ های همزن­ دار بااستفادهاز روش شبیه ­سازی گردابه ­های بزرگ پرداختهشدهاست. مدل های مختلف استفادهشده، مقایسه و مناسب ­ترین مدل برای شبیه­ سازی گردابه ­های بزرگ جریان در تانک ­های همزن­ دار پیشنهادمی­ شود.
 
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Application of the Large Eddy Simulation Method in Numerical Study of Turbulent Flows in Stirred Tanks

نویسندگان English

Sara Jafari Tadi
Leila Nasr Azadani
Department of Chemical Engineering, Amirkabir University of Technology
چکیده English

Mixing with the aim of producing high-quality and homogeneous products is one of the important processes in chemical engineering. Mixing is usually performed in stirred tanks. The rotation of the stirrer in the stirred tank creates complex turbulent flows. Numerical simulation of such flows is challenging. In general, the numerical study of turbulent flows is performed using three methods, including the Direct numerical simulation, Large eddy simulation and Reynolds averaged Navier-Stokes equations. Large eddy simulation is placed between the other two methods in terms of accuracy and computational cost, and with the increased computing power, large eddy simulation has received much attention in recent years. In this article, the research papers conducted on stirred tanks using the large eddy simulation method has been reviewed. Different models are compared and the most suitable models in large eddy simulation of turbulent flow in stirred tanks is presented.

کلیدواژه‌ها English

Mixing
Stirred Tank
Computational Fluid Dynamics
Large Eddy Simulation
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