Review
Energy & Fuels
Yilin Fan, Auzan Soedarmo, Eduardo Pereyra, Cem Sarica
Summary: Pseudo-slug flow, a common flow pattern in oil and gas production operations, has recently gained significant attention due to its distinct characteristics from traditional slug flow. Studies have shown that pseudo-slugs are more dominant under certain conditions, and their presence is influenced by factors such as pressure, liquid viscosity, pipe diameter, and inclination angle.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Yu Lei, Zhenghua Wu, Wei Wang, Jian Wu, Bin Ma
Summary: In this study, a new model for flow pattern transition in inclined annulus pipe was proposed, which exhibited higher accuracy compared to existing correlations. Through experiments and verification, the accuracy of the new model reached 83%, indicating its effectiveness in predicting the transition of flow patterns in gas-liquid two-phase flow.
Article
Engineering, Petroleum
Archibong Archibong-Eso, Yahaya Baba, Aliyu Aliyu, Joseph Ribeiro, Fidelis Abam, Hoi Yeung
Summary: This study investigates sand transport in heavy-oil/water multiphase flow, analyzing various factors impacting the sand-transport mechanism in pipelines. An improved predictive correlation for multiphase heavy-oil/water/sand flow is proposed based on experimental data.
Article
Thermodynamics
Mariana M. Grigoleto, Carlos L. Bassani, Marco G. Conte, Cristiane Cozin, Fausto A. Barbuto, Rigoberto E. M. Morales
Summary: A new set of equations for predicting the temperature distribution of gas-liquid slug flows is proposed, avoiding non-physical oscillations found in previous equations. The temperature is now assigned to the whole unit cell instead of each structure individually. Comparison with experimental data showed deviations of +/- 25% for temperature and pressure gradients.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Electrical & Electronic
Lusheng Zhai, Haiyan Xia, Hailin Xie, Jie Yang
Summary: In this study, a combined ultrasonic and conductance sensing system was designed for measuring slug flows in experiments. The results showed that the reflection ultrasonic transducer was more effective in detecting local gas-liquid interface structures, and the slug lengths in gas-liquid flows could be calculated using the conductance sensor.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Chemistry, Multidisciplinary
Shuzhe Shi, Guoqing Han, Ziyao Zhong, Zhun Li
Summary: This study focused on two-phase slug flow in curved pipes, with experimental results showing that slug length is influenced by pipe curvature, inflow angle, and gas-liquid velocity ratio. A dynamic slug flow model was used to simulate well completion and throttle cases, demonstrating that large-scale segregated completion and reduced throttle opening lead to decreased flow instability.
Article
Engineering, Marine
Yeqi Cao, Qiang Xu, Tianyu Liu, Haiyang Yu, Bo Huang, Liejin Guo
Summary: This study obtained data on long hydrodynamic slugs at high liquid velocity and low gas velocity through experimental observations, and found that slug flow can occur at a lower superficial gas velocity in long pipelines.
Article
Mechanics
Chuanshuai Dong, Ronghui Qi, Lizhi Zhang
Summary: This paper develops a novel mechanistic model for flow and heat transfer in two-phase slug flow in horizontal pipes. The model is validated by experimental results and comprehensively investigates the dependence of heat transfer performance on overall and local flow parameters.
Article
Mechanics
Pan Zhang, Xuewen Cao, Sisi Qin, Pengbo Yin, Dan Guo, Chao Wu
Summary: The new pigging approach using SDS surfactant improves the flow pattern of gas-liquid two-phase flow, facilitates liquid discharge, reduces slug frequency, and increases slug length under slug flow conditions in wet-gas gathering pipelines.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Mechanical
Hong-Cheol Shin, Santhosh Senguttuvan, Sung-Min Kim
Summary: This study investigates the stable and unstable slug flow in micro-channels through experiments and measurements, and identifies the fundamental characteristics of different types of slug flow. The analysis of pressure data reveals a correlation between pressure fluctuation and morphological characteristics of the slug flow.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Energy & Fuels
Keigo Shimizu, Kairi Kato, Tomoyuki Kobayashi, Yoshiyuki Komoda, Naoto Ohmura
Summary: This study experimentally investigated the flow characteristics and mixing properties of two-phase flow in a continuous Taylor-Couette flow reactor (CTCR) with a narrow gap width. The study revealed the occurrence of slug flows with alternating gas and liquid phases, similar to what is observed in microchannels, in a certain flow regime of the CTCR with a gap width of 0.5 mm, which is the narrowest ever studied. The non-dimensional effective diffusion coefficient Deff/uL of the slug flow was measured and it was found that ideal plug flow mixing characteristics could be achieved under this flow condition.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Thermodynamics
Hedilberto A. A. Barros, Romulo L. P. Rodrigues, Rafael F. Alves, Cristiane Cozin, Hendy T. Rodrigues, Roberto da Fonseca Jr, Marco J. da Silva, Moises A. Marcelino Neto, Rigoberto E. M. Morales
Summary: This study presents experimental research on gas-liquid two-phase slug flow pattern in pipes with slight direction change. The study found that slug flow tends to modify itself by changing its features or transitioning to another flow pattern. Three different phenomena of slug dissipation were observed: gas plug, stratification, and wave flooding.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2022)
Article
Engineering, Chemical
Jiawei Zhou, Linjian Shangguan, Kuidong Gao, Yanhua Wang, Yongxing Hao
Summary: The study numerically investigated the slug characteristics of dense phase pneumatic conveying of coarse particles based on experimental verification, introducing a light medium mixed flow pneumatic conveying to improve slug formation. The study highlighted the continuous updating and rolling forward of slugs with particle exchange, the increasing slug velocity throughout the conveying process, and the segregated distribution of rear angles for formed and collapsed slugs.
Article
Engineering, Mechanical
Weikai Ren, Jiachen Zhang, Ningde Jin
Summary: The rescaled range permutation entropy is found to be more appropriate for characterizing the extreme volatility of systems. Its significant discernibility for flow structure sudden changes in experimental signal analysis of gas-liquid two-phase slug flow opens up a new way for investigating the dynamic complexity of slug flow.
NONLINEAR DYNAMICS
(2021)
Article
Mechanics
Junchao Huang, Yandan Jiang, Haifeng Ji, Baoliang Wang, Zhiyao Huang
Summary: This study focuses on the electrical impedance characteristics of slug flow in small channels and its potential for void fraction estimation. Experimental results show the existence of scale effect in small channels, and the velocity of the slug has a significant influence on the relationship between impedance characteristics and void fraction. With these characteristics, effective void fraction estimation models can be developed.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)