Theoretical investigation of a stream; Case study
Publish place: First Gas,Technology & Development Conference
Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
FGTDC01_034
تاریخ نمایه سازی: 27 فروردین 1393
Abstract:
Calculations have been carried out using the "PHOENICS" for two-phase flow in a concentric annulus with a rotating inner cylinder. The flow in such system for the single-phase flow is well known as the Taylor-vortex flow. The two-phase Taylor-vortex flow has quite interesting characteristics in experiments. With increasing of the rotating inner cylinder, bubbles agglomerate and make spirals or rings owing to the Taylor-vortex. According to the flow visualization of a cross section in the annulus, the bubbles of spirals or rings locate at very close to the rotating inner cylinder and at out-flow region. Calculations carried out to confirm these characteristics and investigate in detail. Two-phase Taylor-vortex flow was calculated in two dimensional cylindrical coordinate with IPSA method. The original k- and k- RNG models are used as the turbulent model. It is confirmed that the Taylor-vortex is obtained in this calculation by the vector of liquid phase. From the void fraction distribution, bubbles exist close to the inner cylinder and locate at out-flow region as same as the experimental results. The calculated results agree with the experimental results qualitatively but we do not obtain the quantitative agreements.
Authors
Farshad Farahbod
Department of Chemistry, Firoozabad branch, Islamic Azad University, Firoozabad, Fars, Iran
Alireza Pakdel
National Iranian Oil Products Distribution Company -Fars regions-Firouzabad zone
Sara Farahmand
School of Chemical and Petroleum Engineering, Shiraz, Iran
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