Article
Mathematics, Applied
Yousef Kazemian, Saman Rashidi, Javad Abolfazli Esfahani, Omid Samimi-Abianeh
Summary: The Lattice Boltzmann method was used to simulate propane-air mixture combustion in porous media with different grain shapes. The effects of these shapes on flow fields, temperature fields, and flame characteristics were investigated. It was found that grains with sharp corners in the porous media provided the highest reverse flow, while rectangular and triangular grains provided the highest and least pressure drop, respectively.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Thermodynamics
Mou Wang, Hui Wang, Ying Yin, Susanto Rahardja, Zhiguo Qu
Summary: In this study, a supervised convolutional neural network (CNN) was used to predict the temperature field and effective thermal conductivity of porous media under various boundary conditions. The CNN achieved accurate and fast predictions, showing promise for the prediction of heat transport properties in porous media.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Timan Lei, Kai H. Luo
Summary: This study develops a sophisticated lattice Boltzmann model for simulating reactive flows in porous media on the pore scale, capturing pore-scale information of compressible/incompressible fluid motions, homogeneous reaction between miscible fluids, and heterogeneous reaction at the fluid-solid interface. The model also introduces correction terms for temperature-dependent density and investigates scenarios of density fingering with homogeneous reaction. Additionally, solid coke combustion in porous media is modeled, with effects of viscosity contrast on unstable combustion fronts being clarified.
FRONTIERS IN PHYSICS
(2021)
Article
Thermodynamics
Xiaofei Zhu, Sen Wang, Qihong Feng, Lei Zhang, Li Chen, Wenquan Tao
Summary: This study employed a lattice Boltzmann model to validate the flow of three immiscible fluids in three-dimensional porous media, and analyzed the effects of wettability, viscosity ratio, and capillary number on relative permeability curves in detail.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Wendong Wang, Han Wang, Yuliang Su, Meirong Tang, Jilong Xu, Qi Zhang
Summary: This paper comprehensively studies confined water flow in shale porous media, considering nanoscale effects and coupling transport mechanisms in different media. The research reveals that nanoscale effects greatly impact water flow behaviors, and confined water flow is sensitive to heterogeneous wettability and pore size.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Energy & Fuels
Rodrigo Michels, Diogo Nardelli Siebert, Luis Orlando Emerich dos Santos
Summary: This study investigates the impact of capillary number on wetting and nonwetting phase saturation in porous rocks, demonstrating that different capillary numbers lead to various patterns of fluid invasion and redistribution. Pore-scale events play a crucial role in trapping wetting fluid, with low capillary numbers showing higher nonwetting fluid saturation in 2D models and more trapped wetting fluid in 3D models. Heterogeneity in 3D models has a significant effect on sweeping effectiveness compared to porosity or intrinsic permeability.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Andre F. V. Matias, Rodrigo C. V. Coelho, Jose S. Andrade Jr, Nuno A. M. Araujo
Summary: The flow through a porous medium is significantly affected by boundary conditions, which are often assumed to be static. Changes in the medium due to swelling and erosion have been considered in extending existing lattice-Boltzmann models. The competition between swelling and erosion determines the steady state, with a transition between regimes where either swelling or erosion dominates.
JOURNAL OF COMPUTATIONAL SCIENCE
(2021)
Article
Thermodynamics
Sheng Chen, Wenhao Li, Hayder Mohammed
Summary: This study investigates the heat transfer characteristics of natural convection of large Prandtl number fluids in porous media using a novel lattice Boltzmann approach. It reveals significant differences between large and small Prandtl number fluids, with the former more easily transitioning from a convection-dominated process to a conduction-dominated one in porous media.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Computer Science, Interdisciplinary Applications
Mohammad Kazemi, Ali Takbiri-Borujeni, Sam Takbiri, Arefeh Kazemi
Summary: A physics-informed machine learning model is developed to replace numerical simulations of porous media. The model accurately predicts flow fields by learning the communications among grid cells. Generalization of permeability with high accuracy is challenging due to the random arrangements of particles, and building a comprehensive database for different grain/pore arrangements is expensive. The developed model uses deep learning to represent porous media and combines neural network architectures to avoid gradient issues, with the continuity and momentum conservation equations embedded in the loss function.
COMPUTERS & FLUIDS
(2023)
Article
Engineering, Environmental
Zhijun Li, Fangchao Yan, Xiangjin Kong, Boxi Shen, Zhiyang Li, Yan Wang
Summary: The importance of the bridge structure in diesel particulate filter functionality was investigated through simulation of its formation process. The results showed that the interception, inertia, and diffusion mechanisms are important in early particle filtration stages, but the bridge structure capture mechanism gradually dominates the capture of particles. Additionally, the flow velocity and particle size were found to affect the formation of bridge structure in DPF filtration.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Physics, Fluids & Plasmas
Dario Maggiolo, Francesco Picano, Federico Toschi
Summary: Through pore-scale numerical simulations, it has been shown that directional-dependent two-phase flow behavior can be achieved in anisotropic porous media with controlled design. The results demonstrate distinct invasion dynamics based on the direction of fluid injection relative to the medium orientation.
Article
Environmental Sciences
Eric A. Chadwick, Lucas H. Hammen, Volker P. Schulz, Aimy Bazylak, Marios A. Ioannidis, Jeff T. Gostick
Summary: A new image-based technique that considers the effect of gravity during drainage process was developed and validated in this study. The results showed favorable comparisons with capillary rise and micromodel experiments, and also generated a contour map of expected error to determine when gravitational effects cannot be ignored.
WATER RESOURCES RESEARCH
(2022)
Article
Thermodynamics
Ping Wang, Ganggang Sun, Bo Dong, Lele Chen, Xuan Zhang, Boyuan Gong
Summary: In this study, the phase-change lattice Boltzmann method was used to simulate evaporation on a porous medium surface. A new wetting boundary scheme was proposed to consider surface wettability. The effect of surface wettability on evaporation in the porous medium was investigated, and it was found that reducing the contact angle of the porous media skeleton can increase the surface evaporation rate when the porous medium is hydrophilic. However, the benefit of decreasing the contact angle to improve the evaporation rate decreases as the contact angle of the skeleton decreases.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Computer Science, Interdisciplinary Applications
Xinyue Liu, Lei Wang, Jiangxu Huang, Xuguang Yang
Summary: In this study, a lattice Boltzmann method for thermal flows in porous media is proposed and validated using the Maxwell iteration. The method is found to be more concise and applicable compared to previous models. The results of the tests demonstrate its accuracy and capability in simulating thermal flows in porous media.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Chemistry, Physical
Dong Hyup Jeon, Sangwon Kim, MinJoong Kim, Changsoo Lee, Hyun-Seok Cho
Summary: This study investigates the dynamic behavior of oxygen bubbles in a porous transport layer (PTL) using a free surface model in a lattice Boltzmann framework. The goal is to gain a fundamental understanding of bubble transport phenomena and improve bubble removal efficiency in high current density operations. The impact of PTL properties on bubble transport behavior is examined through analysis of bubble volume fraction and distribution. Oxygen bubble transport characteristics that determine bubble removal time are extensively studied.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Chemical
Yuequn Tao, Jun Cai, Xiulan Huai, Bin Liu
CHEMICAL ENGINEERING & TECHNOLOGY
(2018)
Article
Thermodynamics
Jun Cai, Xiulan Huai, Wenxuan Xi
Article
Thermodynamics
Wenxuan Xi, Jun Cai, Xiulan Huai
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Jun Cai, Xiulan Huai, Bin Liu, Zhendong Cui
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Acoustics
Yuequn Tao, Jun Cai, Xiulan Huai, Bin Liu
ULTRASONICS SONOCHEMISTRY
(2018)
Article
Chemistry, Applied
Jun Cai, Huixing Wu, Qiangqiang Ren, Li Lin, Tuo Zhou, Qinggang Lyu
FUEL PROCESSING TECHNOLOGY
(2020)
Article
Chemistry, Applied
Huixing Wu, Jun Cai, Qiangqiang Ren, Chaoting Shi, Angran Zhao, Qinggang Lyu
FUEL PROCESSING TECHNOLOGY
(2020)
Article
Thermodynamics
Wu Huixing, Cai Jun, Ren Qiangqiang, Cao Xiaoyang, Lyu Qinggang
Summary: A fuel pretreatment method based on coal preheating concept was proposed to reduce NOx emission from cement kilns in this research. Experimental results showed that the method could achieve high combustion efficiency, steady operation, and low NOx emission. Key parameters such as primary and secondary air ratios significantly affected NOx emission and primary NOx reduction efficiency.
JOURNAL OF THERMAL SCIENCE
(2021)
Article
Energy & Fuels
Rui Chen, Jun Cai, Xiaofang Wang, Weijian Song, Xinli Li, Qinggang Lyu
Summary: A novel Complementation-Distributed Activation Energy Model (C-DAEM) has been proposed in this study, which demonstrates better performance in predicting pyrolysis process of fuels and provides useful insight for the design of industrial pyrolysis reactor.
Article
Thermodynamics
Chaoting Shi, Jun Cai, Qiangqiang Ren, Huixing Wu
Summary: The nitrogen oxides (NOx) emitted from the cement industry have garnered increasing attention, and current denitrification technologies are unable to meet China's increasingly strict emission requirements. Our previous work proposed the fuel in-situ reduction (FISR) method to reduce cement NOx emissions. The FISR method was optimized using the computational fluid dynamics (CFD) method with a pilot-scale precalciner as the object of study. The results showed a 69.86% decrease in NOx emissions after implementing the FISR method. The effects of initial concentrations of NO and O2 in kiln gas, as well as the feeding locations of the first-stage tertiary air and cement raw meal, were further investigated. The study's findings provide strong support for the practical application of the FISR method in the cement industry.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Thermodynamics
Rui Chen, Jun Cai, Xinli Li, Qinggang Lyu, Xiaobin Qi
Summary: Using large-size fuel particles with thermal resistance, a comprehensive study on volatile evolution and temperature distribution history was conducted. The results showed that the C-DAEM method was better than the traditional DAEM method. Both particle size and heating temperature had an influence on overall temperature, but through different ways.
Article
Green & Sustainable Science & Technology
Huixing Wu, Jun Cai, Qiangqiang Ren, Jing Xu, Fuhao Chu, Qinggang Lyu
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Energy & Fuels
Huixing Wu, Qiangqiang Ren, Jun Cai, Qinggang Lyu
JOURNAL OF THE ENERGY INSTITUTE
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Xinghui Li, Deng Luo, Guodong Bai, Hanyan Li, Yinfu Hu, Jun Cai, Wei Liu, Jinshu Wang, Jinjun Feng, Fujiang Liao
2017 EIGHTEENTH INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Ye Tang, Hanyan Li, Lin Zhang, Tianyi Li, Shishuo Liu, Jun Cai, Xianping Wu, Jinjun Feng
2017 EIGHTEENTH INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC)
(2017)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
