CIVILICA We Respect the Science
(ناشر تخصصی کنفرانسهای کشور / شماره مجوز انتشارات از وزارت فرهنگ و ارشاد اسلامی: ۸۹۷۱)

گواهی نمایه سازی مقاله Hydraulic Analysis of Two Phase Flow in Helical Pipes: Turbulence and Population Balance Modeling

عنوان مقاله: Hydraulic Analysis of Two Phase Flow in Helical Pipes: Turbulence and Population Balance Modeling
شناسه (COI) مقاله: ICHEC07_287
منتشر شده در هفتمین کنگره ملی مهندسی شیمی در سال ۱۳۹۰
مشخصات نویسندگان مقاله:

Mahmood Reza Rahimi - Chemical engineering department, School of engineering,Yasouj University, Yasouj 75918-74831, Iran
Mehdi Ghanbari - Chemical engineering department, School of engineering,Yasouj University, Yasouj 75918-74831, Iran
Aboalfazl Askari - Chemical engineering department, School of engineering,Yasouj University, Yasouj 75918-74831, Iran

خلاصه مقاله:
Hydraulic analysis of air-water tow phase flow in helical pipes is investigated using computational fluid dynamics. The main attention of this work focuses on comparison of the results of the k-ε turbulence model and Shear Stress Transport (SST) turbulence model, by applying Multiple Size Group (MUSIG) model for size distribution coupled with models for coalescence and breakup of bubble groups. For comparison purposes, the pressure drop results of flow along the length of the helical pipes of those models are compared with the correlated experimental data. The results of the SST-MUSIG combined model are more accurate than the other situations. The detailed analysis of the flow in the helical pipes has been carried out by plotting of contour plots of velocity, pressure and air void fraction . After pouring the two phase flow of dispersed air in water, the air bubbles are immediately aggregated and concentrated to the inner side of the pipe wall while the mean bubbles diameter along the flow are nearly constant. The secondary flows inhibits the bubbles aggregation, conversely, the buoyancy forces in turbulence flow are the main causes of collision of bubbles in helical pipes. On the other side, the centrifugal forces lead to the higher concentration region of water lies at the outer side of the pipe walls.

کلمات کلیدی:
Helical Pipes, Air-water two Phase Flow, Multiple Size Group Model, Shear Stress Transport Model

صفحه اختصاصی مقاله و دریافت فایل کامل: https://www.civilica.com/Paper-ICHEC07-ICHEC07_287.html