Abstract
The main purpose of this study is to compare two-dimensional (2D) and three-dimensional (3D) two-phase models for both stratified and slug flows. These two flow regimes interest mainly the petroleum and chemical industries. The volume of fluid (VOF) approach is used to predict the interface between the two-phase flows. The stratified turbulent flow corresponds to the oil-water phases through a cylindrical pipe. To simulate the turbulent stratified flow, the k − ω turbulence model is used. The slug laminar flow concerns the kerosene-water phases through a rectangular microchannel. The simulated results are validated using the previous experimental results available in the literature. For the stratified flow, the axial velocity and the water volume fraction profiles obtained by 2D and 3D models approximate the measurement profiles at the same test section. Also, the T-junction in a 2D model affects only the inlet vicinity. For downstream, the 2D and 3D models lead to the same axial velocity and water volume distribution. For the slug flow, the simulated results show that the 3D model predicts the thin film wall contrary to the 2D model. Moreover, the 2D model underestimates the slug length.
Highlights
Academic Editor: Sundarapandian Vaidyanathan e main purpose of this study is to compare two-dimensional (2D) and three-dimensional (3D) two-phase models for both stratified and slug flows. ese two flow regimes interest mainly the petroleum and chemical industries. e volume of fluid (VOF) approach is used to predict the interface between the two-phase flows. e stratified turbulent flow corresponds to the oil-water phases through a cylindrical pipe
Based on the experimental study conducted by Elseth in [6], the stratified flow occurs under low mixture velocity, and when the mixture velocity increases, the dispersed regime is observed. e contribution of the wall film associated with the slug flow on the mass transfer was demonstrated experimentally by Arsenjuk et al in [7]. e available analytical solution is limited to a particular flow pattern
The k − ω turbulence model was adopted. 3D Reynolds Average Navier–Stokes (RANS) equations combined with the VOF method were used by Al-Yaari and Abu-Sharkh in [14] to simulate the oil and water stratified flow. e oil enters perpendicular to the water inlet along a T-junction configuration
Summary
Academic Editor: Sundarapandian Vaidyanathan e main purpose of this study is to compare two-dimensional (2D) and three-dimensional (3D) two-phase models for both stratified and slug flows. ese two flow regimes interest mainly the petroleum and chemical industries. e volume of fluid (VOF) approach is used to predict the interface between the two-phase flows. e stratified turbulent flow corresponds to the oil-water phases through a cylindrical pipe. Senapati and Dewangan in [13] used a 2D T-junction model to study the stratified flow with three different approaches to capture the interface between the oil and water phase. E coupled level set and volume of fluid (CLSVOF) can better reproduce the flow characteristics For all these simulations, the k − ω turbulence model was adopted. E pressure drop associated to the slug flow was investigated experimentally by Kashid and Agar in [15] using a Y-junction as inlet configuration of the oil and water fluids. Based on 2D Tjunction inlet configuration, the different transition flow patterns were validated. e RANS coupled with the VOF model and the k − ε turbulence model were used
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