Article
Thermodynamics
Carlos A. Dorao, Maria Fernandino
Summary: The heat transfer mechanisms during flow condensation of binary mixtures inside pipes have been extensively studied, and it has been found that the heat transfer coefficient follows a similar scaling law for single and binary component fluids. This discovery reduces the complexity of the model and suggests that the dominant heat transfer resistance is located in the conductive sublayer, unaffected by the flow pattern, liquid film thickness, or mass transfer resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Zongqi Guo, Dylan Boylan, Li Shan, Xianming Dai
Summary: Researchers report a flow-separation condensation mode on a hydrophilic reentrant slippery liquid-infused porous surface (SLIPS) that can rapidly remove droplets with diameters above 50μm and achieve high frequency droplet collection. This new approach significantly increases the water harvesting rate compared to traditional hydrophilic flat SLIPS.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Thermodynamics
Lin Ding, Yue Sun, Zuomei Yang
Summary: The present study numerically investigated the flow-induced vibration and heat exchange interaction between two circular cylinders in staggered arrangement. The results showed that the spacing and staggered angle of the cylinders have significant influences on the vortex pattern, amplitude, and Nusselt number.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Wei Li
Summary: Developing novel enhanced surface tubes is an important approach to improve two-phase flow heat transfer. However, accurately predicting the heat transfer correlations in enhanced tubes has been a challenging task. This paper presents a method to directly develop two-phase heat transfer correlations in enhanced tubes based on existing smooth tube models, by introducing modifying factors and dimensionless numbers. The method is supported by theoretical analysis and experimental studies, and new correlations are successfully developed in an enhanced heat transfer tube as an example.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yongnam Lee, Myeonggi Cha, Hyungrae Kim, HangJin Jo
Summary: This study experimentally investigated the film condensation heat transfer of low-mass-flux high-pressure steam in inclined tubes, and analyzed the effects of different parameters on the heat transfer coefficient. The study also discussed the local heat transfer variations due to different flow patterns.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Xiaojing Ma, Jinliang Xu, Jian Xie
Summary: This article reviews the principle of phase separation in phase change heat transfer, discussing its design and operation in evaporators, condensers, and heat pipes, as well as its impact on pool boiling performance and flow instability in micro-evaporators.
Article
Thermodynamics
Feng Nie, Haocheng Wang, Yanxing Zhao, Qinglu Song, Shiqi Yan, Maoqiong Gong
Summary: This study presents machine learning methods for predicting flow condensing heat transfer coefficients inside horizontal tubes based on an assembled database, and demonstrates excellent predictive performances of the designed ML models. A new universal correlation is developed, showing reliable predictions for all data points in the database.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Peixun Yang, Hui Wang, Jiabao Liu, Shuhang Zhou, Xiaxin Cao
Summary: The experimental investigation studied the condensation heat transfer characteristics of steam in a horizontal tube under rolling motion. The results showed that the condensation flow patterns were more complex under rolling conditions due to the influence of rolling period and amplitude. The instantaneous heat transfer coefficient (IHTC) changed periodically with the rolling motion, and its pulsation amplitude increased with rolling amplitude but weakened as vapor quality increased. The findings provide important insights for improving the design and operation of in-tube condensation heat transfer systems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Lianxiang Ma, Xiangzeng Liu, Yu Gao, Wei Li, Zan Wu, Xing Luo, Zhi Tao, Stephan Kabelac
Summary: Micro-fin tube and 3-D enhanced tube have higher heat transfer coefficients compared to smooth tube. The micro-fin tube thins the condensate thickness and reduces thermal resistance. The 3-D enhanced tube promotes turbulence generation and droplet entrainment, improving heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yongxin Zhang, Li Jia, Chao Dang, Yong Ding, Qi Peng
Summary: An experimental study on flow condensation of binary mixture in a horizontal rectangular channel was conducted, analyzing flow patterns, heat transfer characteristics, and frictional pressure gradients based on parametric studies. The impacts of mass flux, saturation temperature, and wall subcooled temperature on flow condensation were discussed, and a new prediction method for heat transfer coefficient and frictional pressure gradient for R134a/R245fa mixtures was developed with satisfactory accuracy.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Linlin Wang, Chaobin Dang, Eiji Hihara, Baomin Dai
Summary: The use of minichannel heat exchangers in refrigeration and other industries has been increasing due to their high heat transfer efficiency, lightweight, and low carbon emissions. R1234yf/R32, a zeotropic mixture with low GWP, shows promise as a substitute for R410A in commercial refrigeration. This study investigates the condensation heat and mass transfer characteristics of R1234yf/R32 in minichannel test tubes with an inner diameter of 2 mm. The influencing factors on mass transfer and heat transfer coefficient are discussed, and the effects on heat transfer and mass transfer during condensation are analyzed based on the flow pattern and thermophysical properties.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Shulei Li, Shibo Zhang, Boyu Qian, Kan Qin, Kai Luo
Summary: This study proposes two types of wave-structured pipes for heat exchangers and investigates their condensation pressure drop and heat transfer performances. The results show that different wave parameters have a significant impact on heat transfer and pressure drop, and the wave pipes exhibit enhanced overall thermal performance.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yoshitada Aono, Noriyuki Watanabe, Ai Ueno, Hosei Nagano
Summary: This paper presents the design, fabrication, and heat transfer characteristics of a kW-class loop heat pipe (LHP). Experimental investigations were carried out under different cooling conditions to study the influence of the two-phase flow pattern at the condenser on the performance of the LHP.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Kaifen Yan, Nanxi Li, Runze Zhao, Yinong Wu, Rongjian Xie
Summary: The study evaluated the heat transfer performance of a loop heat pipe using a test system, indicating significant changes in flow patterns and heat transfer characteristics at different condenser temperatures, further affecting the performance of the CLHP.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Wenjie Zhang, Linfei Yue, Huanguang Wang, Lin Liang, Cong Qi
Summary: This study establishes superhydrophobic surfaces with different diameters, heights, angles, and spacings through simulations and examines their effects on condensation heat transfer and flow in gravity heat pipes. The results show that superhydrophobic structures can still maintain a small contact angle hysteresis and a short liquid film renewal period under certain conditions, leading to higher wall surface temperatures compared to ordinary surfaces. The fixation of the liquid film and factors such as the diameter and height of the superhydrophobic structures also affect the temperature.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Physical
Wei Zhang, Yongzhi Chai, Jinliang Xu, Guanglin Liu, Yuanzhi Sun
APPLIED SURFACE SCIENCE
(2018)
Article
Thermodynamics
Jinliang Xu, Yuanyuan Chen, Jian Xie
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Jian Xie, Jinliang Xu, Wei Shang, Kai Zhang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Jian Xie, Jinliang Xu, Xiang Li, Huan Liu
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Bingguo Zhu, Jinliang Xu, Xinming Wu, Jian Xie, Mingjia Li
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Chemistry, Physical
Jinliang Xu, Xin Yan, Guohua Liu, Jian Xie
Article
Thermodynamics
Jian Xie, Jinhang Xu, Cong Liang, Qingting She, Mingjia Li
Article
Thermodynamics
Jindou Yuan, Yanbo Wang, Jinliang Xu, Xianbing Ji, Jian Xie
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Editorial Material
Thermodynamics
Jinliang Xu, Yinshi Li, Jian Xie, Gongnan Xie
JOURNAL OF THERMAL SCIENCE
(2019)
Article
Thermodynamics
Jinliang Xu, Chao Liu, Enhui Sun, Jian Xie, Mingjia Li, Yongping Yang, Jizhen Liu
Article
Thermodynamics
Bingguo Zhu, Jinliang Xu, Chenshuai Yan, Jian Xie
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Chemistry, Multidisciplinary
Xin Yan, Jinliang Xu, Zhijun Meng, Jian Xie, Guohua Liu
Article
Energy & Fuels
Jinliang Xu, Haisong Zhang, Bingguo Zhu, Jian Xie
Article
Thermodynamics
Jian Xie, Qingting She, Jinliang Xu, Cong Liang, Wenxiao Li
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Proceedings Paper
Energy & Fuels
Enhui Sun, Jinliang Xu, Han Hu, Bingguo Zhu, Jian Xie, Yawen Zheng
INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS
(2019)
Article
Mechanics
Nicolas Bouvet, Savannah S. Wessies, Eric D. Link, Stephen A. Fink
Summary: This study presents a framework to characterize firebrand flows and compare exposure through the use of a measurement device and data processing methods. The ability to perform exposure comparisons and recognize combustion states is demonstrated.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
P. Botticini, G. Lavalle, D. Picchi, P. Poesio
Summary: This study investigates the gravity-driven liquid layer problem on an inclined plate, taking into account the variable density of the fluid. The study examines the influence of density variation on the formulation of a depth-averaged model and the role of compressibility in long-wave interfacial instability.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Jean-Paul Caltagirone
Summary: This article introduces a method for modeling capillary flows on a surface or at the interface of two fluids. The method involves handling the two components of capillary acceleration using the divergence and curl of surface normal. The proposed formulation is characterized by directional curvature based on dihedral angle, intrinsic anisotropic surface tension per unit mass, and introduction of capillary potential.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Qi-Teng Zheng, Chun-Bai-Xue Yang, Shi-Jin Feng, Yu-Chen Song, Yong Zhao, Yu-Lin Wu
Summary: This paper proposes a new two-phase partitioning boundary model to accurately predict the drying process of a porous medium from saturated to unsaturated conditions. The model is validated through laboratory soil drying tests and the study also investigates the effects of air-water interfacial area and water retention parameters on the drying process.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Alexandra Metallinou Log, Morten Hammer, Svend Tollak Munkejord
Summary: Flashing flow is commonly found in industrial systems and accurate flashing models are essential for the design of safe and efficient CO2 transportation systems. We propose a homogeneous flashing model that takes into account the physical phenomena of phase change. The model is fitted using CO2 pipe depressurization data and we find that the same model parameters can be applied for different cases.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Q. Tan, S. A. Hosseini, A. Seidel-Morgenstern, D. Thevenin, H. Lorenz
Summary: The possible impact of temperature differences during crystal growth is investigated in this study. A numerical model is developed to simulate the crystallization dynamics of (S)-mandelic acid, taking into account temperature effects. The study shows that the heat generation at the crystal interface has only a small effect on the surrounding temperature field.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Hideki Murakawa, Sana Maeda, Sven Eckert
Summary: This study investigates the behavior of bubbles in a liquid metal under the influence of a magnetic field, particularly bubble chains. The results show that increasing the magnetic field strength suppresses the oscillations of the bubbles and concentrates their crossing positions in a specific area. Applying these findings to numerical models can further optimize continuous casting processes.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Johanna Potyka, Kathrin Schulte
Summary: This paper presents an advanced Volume of Fluid (VOF) method for performing three-dimensional Direct Numerical Simulations (DNS) of the interaction of two immiscible fluids in a gaseous environment with large topology changes. The method includes efficient reconstruction of phase boundaries near the triple line using a Piecewise Linear Interface Calculation (PLIC) method and enhanced surface force modeling with the Continuous Surface Stress (CSS) model. Implementation of these methods in the multi-phase flow solver Free Surface 3D (FS3D) yielded successful validation. The simulations provide valuable insights into the collision process and can support future modeling of immiscible liquid interaction.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Martin Rohde, Sebastian Burgmann, Uwe Janoske
Summary: This study investigates the effect of superimposing an incident flow and two-dimensional vibration on the critical air flow velocity required for the detachment of a droplet. The results show that oscillatory excitation at specific frequencies can significantly reduce the critical velocity for droplet detachment.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Tea-Woo Kim, Baehyun Min
Summary: Liquid-gas two-phase slug flow is a complex flow pattern in energy systems, and accurately predicting slug liquid holdup is crucial for system design and operation. Existing HLLS models have limited applicability due to a lack of physical basis. This study proposes a new dimensionless number SP and correlates it with HLLS data, resulting in a unified HLLS correlation that agrees closely with experimental data.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Christian Lieber, Stephan Autenrieth, Kai-Yannic Schoenewolf, Amy Lebanoff, Rainer Koch, Sterling Smith, Paul Schlinger, Hans-Joerg Bauer
Summary: The observation of acoustically levitated droplets offers great potential for studying their evaporation characteristics. The main objective of this study is to present an experimental setup that minimizes the disturbing effects of the levitation technique in order to investigate convective heat and mass transfer during droplet evaporation.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Facundo Cabrera-Booman, Nicolas Plihon, Mickael Bourgoin
Summary: The settling behavior of individual spheres in a quiescent fluid was experimentally studied. The mean trajectory angle with the vertical showed complex behavior as the parameters Gamma and Ga varied. The transition from planar to non-planar trajectories and the emergence of semi-helical trajectories were observed, especially for denser spheres.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Hongbin Wang, Hanwen Luo, Jinbiao Xiong
Summary: This article introduces an iterative screening method for closure models in nucleate boiling flow simulation, and demonstrates its accuracy through experiments.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Alexandra Metallinou Log, Morten Hammer, Han Deng, Anders Austegard, Armin Hafner, Svend Tollak Munkejord
Summary: This study investigates the rapid depressurization of liquid CO2 and compares the predictions of different models. It is found that higher temperatures result in shorter relaxation times.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
Article
Mechanics
Rizwan Zahoor, Sasa Bajt, Bozidar Sarler
Summary: This numerical study evaluates the jet characteristics of non-Newtonian power-law fluids in a gas dynamic virtual nozzle. The results show that shear-thinning fluids result in thicker, longer, and slower jets compared to shear-thickening fluids. Additionally, a dripping-jetting phase diagram of the nozzle is obtained by varying the power law index, gas, and liquid flow rates.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2024)
