Article
Thermodynamics
Fernando G. de Souza, Luis H. R. Cisterna, Fernando H. Milanez, Marcia B. H. Mantelli
Summary: This paper presents an experimental study on the Geyser Boiling phenomenon in two-phase thermosyphons operating with two working fluids simultaneously. The influence of various parameters on the amplitude and frequency of the Geyser Boiling phenomenon is investigated, and it is concluded that the phenomenon can be characterized by Reynolds, Jakob and Bond numbers. Two extreme low and high performance conditions are observed in the Geyser Boiling regime operation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Zeeshan Ahmad Khan, Naseem Ahmad, Mariyam Sattar, Mohd Anul Haq, Ilyas Khan, Abdul Hamid Ganie
Summary: This study proposes an algorithm for accurately simulating bubble growth and addresses the issue of interface deformation in the Volume of Fluid (VOF) interface tracking method. The proposed method is validated through comparisons with theoretical and experimental results, showing good predictive accuracy and parameter consistency. Additionally, the simulation provides insights into temperature and velocity fields that cannot be directly obtained through experiments.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Abolfazl Maleknezhad, Amirreza Ghahremani, Mohammad Behshad Shafii
Summary: This study introduces a novel method of generating electrical power using a thermosyphon heat pipe. The electricity generation module was optimized to achieve high electrical and thermal performance. The results show that the thermal performance is unaffected by the installation of the electricity generation module. A new thermal-electric index was developed to determine the optimal operating conditions.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Luis H. R. Cisterna, Fernando H. Milanez, Marcia B. H. Mantelli
Summary: This work presents an analytical model to predict the Geyser Boiling limit for high temperature two-phase thermosyphons, introducing a new dimensionless bubble release number as an indicator for ideal operation. Experimental observations show that thermosyphons operate in ideal regime when the bubble release number is below 0.01, surpassing the Geyser Boiling phenomenon.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Chia -Wei Lin, Yu -Chen Lin, Ranjith Kumar, Ming-Chieh Lin, Hua-Yi Hsu
Summary: This study numerically investigates the geometry effect on microtube flow boiling and pressure drop. The results show that the total pressure drop is lowest in the divergent microtube, and a larger inflow mass flux can delay vapor bubble formation and increase heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Huicong Yao, Lingfeng Guo, Hao Liu, Xiaoyuan Wang, Haijun Chen, Yinfeng Wang, Yuezhao Zhu
Summary: This study investigates the phase-change flow inside a two-phase loop thermosyphon (TPLT) through a combined three-dimensional computational fluid dynamics (CFD) simulation and experimental investigation. The results show that the vertical evaporator heating mode at a filling ratio of 23.3% has the lowest thermal resistance, while the horizontal evaporator heating mode has better thermal performance. Additionally, the use of a porous media can increase flow stability in the horizontal evaporator.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Myeongjin Kim, Joo Hyun Moon
Summary: This study investigates the heat transfer characteristics of a two-phase thermosyphon under different conditions using computational fluid dynamics, and reveals that thermal resistance decreases with increasing water amount, heat pipe diameter, and heater power.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Diogenes Oliveira de Souza, Pedro Leineker Ochoski Machado, Conrado Chiarello, Eduardo Nunes dos Santos, Marco Jose da Silva, Paulo Henrique Dias dos Santos, Thiago Antonini Alves
Summary: The thermosyphon is a widely used heat exchanger, particularly in solar collectors and industrial activities. The study focused on the geyser-boiling phenomena inside the thermosyphon, and the experimental analysis of parameters related to the two-phase flow was conducted using wire mesh sensors. The results showed that the heat load had an impact on bubble translation velocity, while void fraction and liquid film thickness remained constant.
Article
Thermodynamics
Jeongmin Lee, Issam Mudawar, Mohammad M. Hasan, Henry K. Nahra, Jeffrey R. Mackey
Summary: This study investigates the near-saturated flow boiling of FC-72 in microgravity using Computational Fluid Dynamics (CFD) and validates the results against experimental data. The study reveals different flow mechanisms such as bubble nucleation, growth, and vapor blankets, while also noting the uniformity of wall temperature along the heated length.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Thavamani Jeyaraj, Kumar Pankaj
Summary: The study focuses on the prediction of vapour fraction in horizontal microchannels during flow boiling using numerical simulation with different boiling models. Results showed that the mixture model performed best in estimating vapour fraction compared to other models. The findings can provide design guidelines for selecting proper models in simulation work.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Zhenyu Tan, Xunfeng Li, Junlin Chen, Keyong Cheng, Xiulan Huai
Summary: Two-dimensional computational fluid dynamics simulations were performed to study the flow boiling process of water-based microencapsulated phase change material suspension in a gas-liquid-solid flow system. The results show that the microencapsulated phase change material can enhance the boiling heat transfer ability of the base liquid, and the best enhancement effect is achieved when the core phase change temperature is higher than the boiling temperature of the base fluid. This research lays a foundation for further explorations on gas-liquid-solid flows and possible industry applications.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Energy & Fuels
Zhao Wang, Ali Turan, Timothy Craft
Summary: This study investigates the effect of non-uniform heat-input profiles on a vertical two-phase closed thermosyphon (TPCT) using computational fluid dynamics (CFD) simulation. The results show that the non-uniform heat flux profiles can impact the thermal performance depending on the overall heat loading and the heat flux profile.
Article
Engineering, Multidisciplinary
Kuldeep Singh, Stephen Ambrose, Richard Jefferson-Loveday, Andrew Nicoli, Sandeep Mouvanal
Summary: A computational methodology based on CFD is developed to investigate free surface film flow and its subsequent disintegration on a rotary disk atomizer. The study provides insight into modeling liquid film formation and disintegration. The influence of disk speed, liquid flow, and feed arrangement on the rotating disk are investigated, and different phenomena are observed at different speeds and feeding methods.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2023)
Article
Thermodynamics
Zhoutuo Tan, Zehan Cao, Wenxiao Chu, Qiuwang Wang
Summary: This paper proposes a dynamic correction model based on temperature deviation to define the evaporation mass transfer relaxation coefficient. It saves manpower and computational resources and improves prediction accuracy.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Ankit Kumar, Rajneesh Bhardwaj, Suhas S. Joshi
Summary: Researchers propose a computational fluid dynamics (CFD) based model to investigate the temperature distribution and flow characteristics of cutting fluids in drilling titanium alloys. The model predicts that the temperature of the drill can be significantly reduced under different cooling conditions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Construction & Building Technology
Hao Liu, Xiaoyuan Wang, Kai Wang, Yalu Zhu, Yuezhao Zhu
Summary: Groundwater advection plays a significant role in soil temperature variation, while the study on ground source heat pump systems equipped with super-long flexible heat pipes provides a theoretical basis for design and installation optimization.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Huicong Yao, Chaoyu Yue, Yinfeng Wang, Haijun Chen, Yuezhao Zhu
Summary: An improved CFD model was developed and verified by experiments to study the heat and mass transfer performance of a two-phase closed thermosiphon. The results showed that the model could accurately predict the heat and mass transfer behaviors of TPCT.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Ying Wu, Xiaoping Chen, Ying Dai, Daoyin Liu, Jiliang Ma, Weiyi Xie, Haijun Chen, Lei Wang, Yuezhao Zhu, Xiaotao Bi
Summary: The new energy-saving scheme for combined heat and power (CHP) retrofitting in coal-fired power plants combines high back-pressure (HBP), absorption heat pump (AHP) and absorption heat exchanger (AHE) to reduce exergy losses and waste heat, resulting in increased power output and efficiency. By effectively applying this scheme in dual unit systems, additional power loss due to off-design conditions can be reduced or eliminated, leading to overall performance improvement. Thermodynamic, exergy, and techno-economic analyses show a 3.55% increase in power efficiency with a dynamic payback period of 1.59 years and a net present value increase of 48,805 thousand USD over a 25-year lifespan.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Jianbiao Chen, Shuaifei Gao, Fang Xu, Wenhao Xu, Yuanjiang Yang, Depeng Kong, Yinfeng Wang, Huicong Yao, Haijun Chen, Yuezhao Zhu, Lin Mu
Summary: Pyrolysis tests were conducted on sludge obtained from a steel production enterprise under different conditions. The results showed that the initial weight and heating rate had an impact on the pyrolysis process, and the natural dehydration rate of wet sludge increased as pore canals and crannies formed on the surface.
Article
Thermodynamics
Ying Wu, Ying Dai, Weiyi Xie, Haijun Chen, Yuezhao Zhu
Summary: A new integration scheme for combined heat and power (CHP) plant with post-combustion CO2 capture is proposed in this study. By optimizing parameter matching and recovering waste heat, the system's heating capacity and overall efficiency are increased, leading to a reduction in the cost of electricity and CO2 avoidance cost.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Yanlong Jiang, Jiawei Pan, Danran Li, Ni Zhang, Bingbing Zhu, Yichen Jiang, Haijun Chen, Yuezhao Zhu
Summary: Oil washing for tar removal has been successful, but little research has focused on mass transfer in the tar absorber, especially due to viscosity. This study simulated mass transfer performance using phenol as a simulant and silicone oil as the absorbent. The results showed that viscosity has a significant influence on the mass transfer coefficient, and the actual liquid-gas ratio affects separation performance. Optimizing the spraying angle and mass transfer layer height can improve removal efficiency.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Jinqiang Zhang, Xiaoli Zhao, Lin Chen, Shuli Li, Haijun Chen, Yuezhao Zhu, Shuaijun Wang, Yang Liu, Huayang Zhang, Xiaoguang Duan, Mingbo Wu, Shaobin Wang, Hongqi Sun
Summary: A 2D/2D van der Waals heterojunction of carbon-rich carbon nitride was successfully fabricated using a top-down strategy, resulting in improved photocatalytic performance for the water splitting reaction. The created semiconducting channel in the heterojunction exhibited enhanced electric field exposure and radiation absorption, leading to better charge carrier separation and mobility. Finite element method analysis confirmed the contribution of the heterojunction formation to the enhanced photocatalysis.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Jinqiang Zhang, Yunguo Li, Jiaming Sun, Haijun Chen, Yuezhao Zhu, Xiaoli Zhao, Lai-Chang Zhang, Shuaijun Wang, Huayang Zhang, Xiaoguang Duan, Lei Shi, Shu Zhang, Peng Zhang, Guosheng Shao, Mingbo Wu, Shaobin Wang, Hongqi Sun
Summary: This study systematically investigates the promotion effects of external heat on energetic hot carriers (EHC) in photothermal catalysis. The onset reaction temperature is found to be the key in controlling the energy synergy. Rational regulation of EHC and thermal energy can lead to optimum quantum efficiencies at a medium temperature level.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Thermodynamics
Xinxin Xing, Hongyu Zhao, Lili Zhou, Yangang Wang, Haijun Chen, Ying Gao, Yinfeng Wang, Yuezhao Zhu
Summary: This study evaluated the pyrolysis kinetics and thermodynamics of PTA sludge, and conducted a cyclic in-situ catalytic pyrolysis experiment. The results showed that pyrolysis char could promote tar cracking, leading to increased yield of pyrolysis syngas and carbon conversion rate.
Article
Thermodynamics
Hao Liu, Xiaoyuan Wang, Liying Zheng, Huicong Yao, Yuezhao Zhu, Yingfeng Wang
Summary: A super-long flexible thermosyphon (SFTS) was field-tested in drilling to evaluate its potential for shallow geothermal utilization, showing effective heat transfer and temperature recovery characteristics. The underground temperature was found to play a crucial role in the overall thermal performance of SFTS.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Siqian Zhang, Xiaan Xiang, Zhangfeng Shen, Yinfeng Wang, Xi Li, Xuhui Zou, Haiyang Xu, Yongyong Cao, Haijun Chen, Yangang Wang
Summary: In this study, a NiCe-MOF derived catalyst/wood carbon (NiCe-MDC/WC) was prepared by in-situ growth of layered NiCe-MOF on the surface of raw wood microchannels, and it was used for the steam reforming of biomass tar. The results showed that NiCe-MDC/WC exhibited high catalytic activity and stability, which were attributed to the multilevel structure, metal-support interactions, and the presence of Ce.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Huicong Yao, Lingfeng Guo, Hao Liu, Xiaoyuan Wang, Haijun Chen, Yinfeng Wang, Yuezhao Zhu
Summary: This study investigates the phase-change flow inside a two-phase loop thermosyphon (TPLT) through a combined three-dimensional computational fluid dynamics (CFD) simulation and experimental investigation. The results show that the vertical evaporator heating mode at a filling ratio of 23.3% has the lowest thermal resistance, while the horizontal evaporator heating mode has better thermal performance. Additionally, the use of a porous media can increase flow stability in the horizontal evaporator.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Xiaoyuan Wang, Yuwen Shi, Tiancheng Liu, Shuai Wang, Kai Wang, Haijun Chen, Yifeng Wang, Yuezhao Zhu
Summary: This study develops a comprehensive CFD model to visually reveal the effects of hydrogen permeation on heat transfer in liquid metal heat pipes (LMHPs). Experimental validation confirms the reliability of the model and demonstrates the negative impacts of hydrogen-buffer formation and hydrogen migration on heat transfer.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yuwen Shi, Shuai Wang, Yanshan Feng, Xiaoyuan Wang, Yuezhao Zhu, Jianbiao Chen, Lin Zhu
Summary: This study experimentally investigates the reactivation characteristics of liquid-metal heat pipes (LMHPs) after hydrogen inactivation and optimizes the reactivation operations using theoretical and sensitivity analysis. The results demonstrate that a slope-shaped distribution of hydrogen buffer enables faster reactivation compared to a near-column shape. A sweep-gas flow rate of 200 mL/min is the preferred option under test conditions, considering both reactivation time and pure N2 consumption rate. The working temperature significantly affects the reactivation time, while pressure and preheating temperature of sweep gas have little influence.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Liqiu Li, Huicong Yao, Yinfeng Wang, Haijun Chen, Yuezhao Zhu
Summary: The study shows that coating the surface of copper foam with zinc oxide nanoparticles using magnetron sputtering can directly enhance the boiling heat transfer performance of metal foam wicks, especially for low PPI copper foams. After 12 hours of magnetron sputtering, the heat and mass transfer performance of the 30 PPI copper foam wick improves significantly.
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
(2021)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
