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Retraction notice to “Exploration over combined impacts of modified piston bowl geometry and tert-butyl hydroquinone additive-included biodiesel/diesel blend on” [FUEL 322C (2002) 124206]

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Fuel 2025年 384卷

作者： Krupakaran Radhakrishnan Lawrence Zuohua Huang Xuan Phuong Nguyen Dhinesh Balasubramanian Vidyasagar Reddy Gangula Raghurami Reddy Doddipalli Van Vang Le Sachuthananthan Bharathy Anh Tuan Hoang Department of Mechanical Engineering Sree Vidyanikethan Engineering College Tirupati Andhra Pradesh India State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an 710049 China PATET Research Group Ho Chi Minh City University of Transport Ho Chi Minh City Viet Nam Department of Mechanical Engineering Mepco Schlenk Engineering College Sivakasi India Mechanical Engineering Faculty of Engineering Khon Kaen University Khon Kaen Thailand Center for Alternative Energy Research and Development Khon Kaen University Khon Kaen Thailand Institute of Maritime Ho Chi Minh City University of Transport Ho Chi Minh City Viet Nam Institute of Engineering HUTECH University Ho Chi Minh City Viet Nam

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Pore-Scale Modeling of Coupled CO2flow and Dissolution in 3D Porous Media for Geological Carbon Storage

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Water Resources Research 2023年第10期59卷 e2023WR035402-e2023WR035402页

作者： Yongfei Yang Jinlei Wang Jianzhong Wang Yingwen Li Hai Sun Lei Zhang Junjie Zhong Kai Zhang Jun Yao National Key Laboratory of Deep Oil and Gas China University of Petroleum (East China) Qingdao P. R. China Research Center of Multiphase Flow in Porous Media School of Petroleum Engineering China University of Petroleum (East China) Qingdao P. R. China Y. Yang

Dissolution trapping is one of the crucial trapping mechanisms for geological carbon storage in deep saline aquifers. The injected supercritical CO 2 (scCO 2 ) flow and dissolution processes are coupled and interact with each other. Therefore, we performed direct numerical simulations in three-dimensional micro-CT images of sandstones using the volume of fluid and continuous species transfer method. We investigated the coupled scCO 2 flow and dissolution processes at pore-scale under different rock structures, capillary numbers, and rock wettability conditions. The dynamic evolution of the scCO 2 /brine phase distribution and scCO 2 concentration distribution occurring during the injection period were presented and analyzed. Complicated coupling mechanisms between scCO 2 -brine two-phase flow and interphase mass transfer were also revealed. Our results showed that the scCO 2 dissolution was highly dependent on the local distribution of scCO 2 clusters. The rock with relatively high porosity and permeability would have more capacity for scCO 2 injection resulting in a faster and greater dissolution of scCO 2 in brine. The effect of capillary number on the scCO 2 dissolution process was related to the range of capillary number. The effective upscaled (macro-scale) mass transfer coefficient ( k A ) during scCO 2 dissolution was evaluated, and the power-law relationship between k A and Péclet number was obtained. Rock wettability was found to be another factor controlling the scCO 2 dissolution process by affecting the scCO 2 -brine interfacial area. Our pore-scale study provides a deep understanding of the scCO 2 dissolution trapping mechanism, which is important to enhance the prediction of sequestration risk and improve sequestration efficiency. Pore-scale modeling of coupled CO 2 -brine two-phase flow and interphase mass transfer processes in 3D real rocks Examined the dynamic evolution of CO 2 /brine phase distribution and CO 2 concentration distribution during the

关键词： geological carbon storage pore-scale modeling CO2 dissolution multiphase flow mass transfer

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Heat absorption performance of ultrasonic-assisted phase change thermal management units: A numerical study

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International Journal of Heat and Mass Transfer 2025年 251卷

作者： Junfei Guo Yuanji Li Xinyu Huang Bin Xiao Jiantao Xia Xiaohu Yang Bengt Sundén Institute of the Building Environment & Sustainability Technology School of Human Settlements and Civil Engineering Xi’an Jiaotong University Xi’an 710049 China Northwest Engineering Corporation Limited PowerChina Xi'an 710065 China Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China BS Heat Transfer and Fluid Flow Professor Emeritus of Lund University Angelholm 26253 Sweden

The demand for more efficient thermal management increased due to their key impact on safety and reliability, especially in electronic devices. Phase-change-based devices were emerging as effective heat sinks because they could absorb significant heat during phase change. Meanwhile, ultrasonic could be adopt to overcome poor thermal properties of phase change materials (PCM). In present study, ultrasonic-assisted PCMs were proposed, whose numerical model was developed by adding a momentum source and an equivalent thermal conductivity and validated by experiments. The melting performance, thermal response, flow, heat transfer and heat absorbing characteristics of non-ultrasonic and ultrasonic-assisted PCM units were performed. The influence mechanism of ultrasonic power was also investigated. Resulted that ultrasonic led to faster melting in all directions, with a significant effectiveness of solving the difficult bottom melting. The integral-average thermal response rate of ultrasonic-assisted PCM units at 120 W reached a 354.74% enhancement compared with the non-ultrasonic. The ultrasonic-assisted PCM units could achieve a 372.00% enhancement ratio of heat absorption rate per unit mass, maintaining high-efficiency heat absorption performance during the whole phase change process, showing rapid heat absorption, compact size, and lighter weight, exhibiting the attractive potential and wide application prospects, particularly for managing heat in electronic devices requiring precise temperature control within limited spaces. Ultrasonic-assisted PCM shown significantly higher heat flux of heat source walls, enabling electronic devices to handle greater thermal fluctuations while maintaining safe operation at a constant temperature.

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Elucidating Confinement and Microenvironment of Ru Clusters Stably Confined in MFI Zeolite for Efficient Propane Oxidation

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Angewandte Chemie 2024年第5期137卷

作者： Jingjing Wang Dr. Zeyu Jiang Hengyue Xu Prof. Xinzhe Li Dr. Yanfei Jian Dr. Lianghui Xia Dr. Pei Su Qiyuan Liu Prof. Shouning Chai Dr. Mudi Ma Dr. Abdallah Amedlous Dr. Mathias Barreau Prof. Zhengping Hao Prof. Jiaguo Yu Prof. Chi He State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 Shaanxi P.R. China Laboratoire Catalyse & Spectrochimie Normandie Univ ENSICAEN UNICAEN CNRS Caen 14000 France Department of Chemistry Tsinghua University Beijing 100084 P.R. China College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 P.R. China National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing 101408 P.R. China Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430078 P.R. China

Achieving active and stable heterogeneous catalysts by encapsulating noble metal species within zeolites is highly promising for high utilization and cost efficiency in thermal and environmental catalytic reactions. Ru, considered an economical noble metal alternative with comparable performance, faces great challenges within MFI-type microporous zeolites due to its high cohesive energy and mobility. Herein, an innovative strategy was explored that couples hydrothermal in situ ligand protection with stepwise calcination in a flowing atmosphere to embed ultrasmall Ru clusters anchored at K + -healed silanol sites (≡Si−Ru δ+ −O−K complexes) within 10-membered ring sinusoidal channels of MFI. Comprehensive experiments and theoretical calculations unveiled that the interplay between confined Ru clusters and MFI induces local strain in MFI, creating a unique catalytic microenvironment around the Ru clusters. This synergy interaction enhances alkane deep oxidation as the confined Ru clusters and the MFI microenvironment collectively pre-activate C 3 H 8 and O 2 , facilitate the cleavage of C−H and C−C bonds at low temperatures. Notably, the stable geometric and electronic properties of the confined Ru show exceptional thermal stability up to 1000 °C, rivaling fresh catalysts. These findings shed vital methodological and mechanistic insights for developing efficacious heterogeneous catalysts for thermal catalysis.

关键词： heterogeneous catalysis microenvironment Ruthenium strain zeolite

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Revealing the unexpected promotion effect of EuO_x on Pt/CeO_2 catalysts for catalytic combustion of toluene

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Chinese Journal of Catalysis 2019年第4期40卷 543-552,M0003页

作者： Baoming Zhao Yanfei Jian Zeyu Jiang Chi He Xi’an Modern Chemistry Research Institute Xi’an 710065ShaanxiChina State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Chemistry College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam 31441Saudi Arabia National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of SciencesBeijing 101408China

Pt/Eu2O3-CeO2 materials with different Eu concentrations were prepared and applied to toluene destruction,and the remarkable promotion impact of EuOx on Pt/CeO2 can be *** characterization results reveal that the presence of EuOx significantly enhances the redox property,lattice O concentration,and Ce3+ ratio of the Pt/CeO2 material,which facilitates the dispersion and activity of Pt active sites and thus accelerates the decomposition process of *** all catalysts,a sample with an Eu content of 2.5 at.%(Pt/EC-2.5)possesses the best catalytic activity with 0.09 vol% of toluene completely destructed at 200 ℃ under a relatively high GHSV of 50000 h^-*** possible reaction pathway and mechanism of toluene combustion over Pt/Eu2O3-CeO2 samples are presented according to in-situ DRIFTS,which confirms that the toluene oxidation process obeys the Mars-van Krevelen mechanism with aldehydes and ketones as primary organic intermediates.

关键词： Pt/Eu2O3-CeO2 material Promotion effect Toluene Catalytic oxidation In-situ DRIFTS Reaction mechanism

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A study of a computational BVP for heat transfer and friction drag in magnetohydrodynamics viscous flow of a nanofluid subject to the curved surface

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Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical engineering 2021年

作者： Khan, M Riaz Saleel, C Ahamed Saeed, Tareq Allehiany, F.M. El-Refaey, Adel M Jing, Dengwei Mahmoud, Emad E LSEC and ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences China School of Mathematical Science University of Chinese Academy of Sciences China Department of Mechanical Engineering College of Engineering King Khalid University Saudi Arabia -Research Group Department of Mathematics Faculty of Science King Abdulaziz University Saudi Arabia Department of Mathematical Sciences College of Applied Sciences Umm Al-Qura University Saudi Arabia Department of Basic and Applied Science College of Engineering and Technology Arab Academy for Science Technology Maritime Transport Smart Village Campus Egypt State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University China Department of Mathematics and Statistics College of Science Taif University Taif Saudi Arabia

The ongoing work investigates the features of Joule heating and convective condition over a magnetohydrodynamic stagnation point flow of (Formula presented.) nanofluid moving across a curved surface. Moreover, mass suction is supposed through the stretching/shrinking surface. The initially developed model of partial differential equations is transformed into the ordinary ones assisted by suitable similarity variables. Subsequently, the ultimate nonlinear model of ordinary differential equations is solved with the help of a built-in function bvp4c package in MATLAB. Several graphical results are plotted to see the influence of various dimensionless parameters over the velocity, temperature, heat transfer, and friction drag. We found that there exists an escalation in temperature with increasing values of curvature, Eckert number, Hartmann number, and Biot number;however, the velocity profile declines with large curvature, ratio parameter, and high concentration of nanoparticles. It is also important to note that the friction drag rises with the mass suction, and reduces with vast curvature, whereas the rate of heat transfer improves with suction and Biot number but lowers with Eckert number and Hartmann number. © IMechE 2021.

关键词： Magnetohydrodynamics

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Experimental Study on Deliquification with Atomizing Nozzle in Gas Well

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IOP Conference Series: Earth and Environmental Science 2020年第1期555卷

作者： Yutang Gao Xiaobai Li Peng Chang Lei Liu State Key Laboratory of Multiphase Flow in Power Engineering Xi'an 710049 Shaanxi P.R. China

Gas is a clean energy resource in comparison with oil and coal. Liquid-loading problem is frequently encountered in the process of gas production. It would directly cause the production of gas wells decreasing, even off production. A number of deliquification techniques have been suggested for solving this kind of problem, but the available techniques are not yet widely applicable. Based on the analysis, the method of deliquification with atomizing nozzle in gas wells was put forward. The test bench was designed for studying the atomization of nozzles and the liquid entrainment of gas flow. The size distribution of atomized droplets was measured by Malvern laser grain size analyzer. The Sauter mean diameters of atomized droplets were analysed under different two-phase flow conditions. The results indicate that the designed nozzles have good atomization performances and show potential application for reducing liquid loading in gas wells.

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Vapor condensation with low air mass fraction inside water seal branch tube under free convection

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Nuclear engineering and Design 2021年 379卷

作者： Bing Tan Xi Wang Y.W. Wu W.X. Tian S.Z. Qiu G.H. Su School of Nuclear Science and Technology State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University 28 Xianning West Road Xi an 710049 China School of Electric Power South China University of Technology Guangzhou 510640 China

The pressure vessel has used a newly designed water seal structure, and the sealed water is from condensation at low hydrogen concentration. To get the condensation capacity of the water seal branch tube under the pressure vessel normal operation, the experimental loop named WASETEL was constructed, which is aimed at studying the heat transfer during the process of air-steam mixture condensation inside the inclined branch tube at the condition of low air mass fraction. The inner tube is diameter 0.134 m with length 0.68 m which is connected with diameter 1.4 m, high 2.5 m pressure vessel. A canon camera was set to record the images and videos of the condensate height through glass tube in communicating vessel liquidometer. The experiment was conducted under the pressure ranged from 0.2 to 0.6 MPa, air mass concentration ranged from 0.49 to 6.42% and wall subcooling ranged from 11 to 40 K. The test showed HTC (heat transfer coefficient) would sharply deteriorate with the small air fraction, compared with pure steam condensation, about 0.49% mass fraction of the air will reduce heat transfer coefficient by 70–80%. When air concentration is relatively small, those widely used relations can not predict the condensation well, therefore, a new heat transfer empirical correlation with air mass fraction, pressure and subcooling is proposed, covered all the experimental data within the error band ±13%.

关键词： Natural condensation New empirical correlation Water seal

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Permeability prediction of considering organic matter distribution based on deep learning

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Physics of Fluids 2023年第3期35卷

作者： Hai Sun (孙海) Liang Zhou (周亮) Dongyan Fan (樊冬艳) Lei Zhang (张磊) Yongfei Yang (杨永飞) Kai Zhang (张凯) Jun Yao (姚军) 1Key Laboratory of Unconventional Oil and Gas Development China University of Petroleum (East China) Ministry of Education Qingdao 266580 People's Republic of China 2Research Center of Multiphase Flow in Porous Media School of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 People's Republic of China

At present, researchers predict permeability through core experiments that require specific experimental conditions and methods, which are difficult and time-consuming. Conventional simulation methods for predicting permeability require considerable computational resources. Therefore, deep learning can be used as a pore-scale simulation prediction method. In this study, we established a workflow for directly predicting permeability from images. Considering that the mineral properties of the nanopore wall of shale oil have a large influence on the flow, a core dataset with organic distribution was constructed with random circles, and the slip influence of organic pores was considered. From our dataset, we found that the average permeability with organic distribution was 32.3% higher than that without organic distribution. Therefore, to simulate the microscopic flow and predict the permeability of shale oil, considering the differences in the pore flow mechanisms of different minerals is necessary. We designed a convolutional network for the dataset, adopted the structure of SE-ResNet, added the squeeze-and-excitation (SE) module to the double-layer residual module of ResNet18, and combined the characteristics of the SE block with the attention mechanism and ResNet to effectively obtain the information between channels and avoid the problem of gradient disappearance or explosion. Using SE-ResNet for directly predicting the apparent permeability from images, the accuracy of the test set reached 88.5%. The model had strong generalization ability, and the SE-ResNet could map the image of the core to the apparent permeability, which was approximately 100 times faster than the direct flow simulation.

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Photocatalytic water oxidation over BiVO_4 with interface energetics engineered by Co and Ni-metallated dicyanamides

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Chinese Journal of Catalysis 2018年第3期39卷 502-509页

作者： Yi Shang Fujun Niu Shaohua Shen International Research Centre for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049 Shaanxi China

Photocatalytic water oxidation based on semiconductors usually suffers from poor charge transfer from the bulk to the interface,which is necessary for oxygen ***,we construct a hybrid artificial photosynthesis system for photocatalytic water *** system consists of BiVO4as the light harvester,a transitional metal complex(M(dca)2,M=Co,Ni,dca:dicyanamide)as the water oxidation catalyst,and S2O82?as a sacrificial electron *** system exhibits enhanced oxygen evolution activity when M(dca)2is *** BiVO4/Co(dca)2and Bi‐VO4/Ni(dca)2systems exhibit excellent oxygen evolution rates of508.1and297.7μmol/(h·g)compared to the pure BiVO4which shows a photocatalytic oxygen evolution rate of252.2μmol/(h·g)during6h of photocatalytic ***(dca)2is found to be more effective than Ni(dca)2as a water oxidation *** enhanced photocatalytic performance is ascribed to the M(dca)2‐engineered BiVO4/electrolyte interface energetics,and to the M(dca)2‐catalyzed surface water *** two factors lead to a decrease in the energy barrier for hole transfer from the bulk to the surface of BiVO4,which promotes the water oxidation kinetics.

关键词： Metal complex BiVO4 Water oxidation Photocatalysis Interfacial kinetics

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