Numerical investigation of upward air-water annular, slug and bubbly flow regimes

Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_JCARME-9-2_014

تاریخ نمایه سازی: 17 فروردین 1399

Abstract:

In this paper, numerical investigation of upward two phase flow of air-water has been studied. Different conditions of flow regimes including annular, wispy annular, slug, churn and bubbly are simulated based on Hewitt and Roberts map, and a good agreement between the experimental data of the map and the numerical simulation has been observed. Accordingly, a proper CFD model in CFD software of Fluent with the required User Defined Function (UDF) has been obtained to simulate two phase flows of fluids with large density ratio in vertical tubes. The simulation is carried out with the volume of fluid (VOF) method and piecewise interface calculation (PLIC) algorithm for tracking the interface for the annular, wispy annular, churn and slug flow regimes and drift flux model for bubbly with proper selection of computational cell and time step sizes. Furthermore, water and air momentum fluxes have been changed and the changes to the flow patterns are studied.

Keywords:

Numerical simulation , two phase flow regimes , volume of fluid method , annular , slug , bubbly

Authors

Maryam Hassani

Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran

Mohammad Bagheri Motlagh

Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran

Ramin Kouhikamali

Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran

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