Thermal Science and Engineering Progress最新文献

{"title":"Experimental study of magnetic field effect on transient Fe3O4 ferrofluid pool boiling at saturated conditions","authors":"Ahmadreza Ayoobi ,&nbsp;Ahmadreza Faghih Khorasani","doi":"10.1016/j.tsep.2025.103476","DOIUrl":"10.1016/j.tsep.2025.103476","url":null,"abstract":"<div><div>To meet the demand for coolants with higher heat transfer coefficients, a new fluid known as nanofluid was developed. As research progressed, various nanoparticles were incorporated into nanofluids to enhance their thermophysical and heat transfer properties. Among these, ferrofluids were created by adding ferromagnetic nanoparticles to a base fluid. Due to the unique properties of ferrofluids, one research focus is the impact of magnetic fields on their thermal and heat transfer characteristics. Additionally, transient pool boiling—an essential condition with industrial relevance—has been less studied. This research explores both the effects of magnetic fields and the transient nature of pool boiling. This study compares the outcomes of transient Fe3O4 ferrofluid pool boiling under magnetic field presence and absence conditions. Two circuits were designed and built to test periods of 1, 5, 10, 100, 1000, and 5000 s by controlling the heat flux input to a wire heater. Fe3O4 ferrofluid, a working fluid created using a two-step process, had a volume concentration of 0.01 %. The effect of a magnetic field on transient ferrofluid pool boiling characteristics was studied with two permanent magnets made of ceramic materials. The wire superheat temperatures in the presence of the magnetic field dropped by 1.13, 1.05, and 1.27 times, respectively, throughout periods of 1 s, 100 s, and 5000 s. When compared with situations in which a magnetic field wasn’t there, the existence of a magnetic field showed higher heat transfer coefficient. Nanoparticle deposition was accelerated by a magnetic field and settled with particular behaviour at the wire’s surface.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103476"},"PeriodicalIF":5.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The secondary deterioration phenomenon of heat transfer performance of supercritical CO2 in horizontal tube under different gravity conditions","authors":"Ping Yuan ,&nbsp;Hua Tian ,&nbsp;Xuan Wang ,&nbsp;Xuanang Zhang ,&nbsp;Yuanxun Ding ,&nbsp;Zhi Ling ,&nbsp;Gequn Shu","doi":"10.1016/j.tsep.2025.103472","DOIUrl":"10.1016/j.tsep.2025.103472","url":null,"abstract":"<div><div>Supercritical CO₂ (SCO₂) is a promising aerospace coolant. However, spacecraft often operate under abnormal gravity. Quantifying SCO₂ heat transfer characteristics under different gravity is crucial for enhancing aviation thermal control system precision and stability. Therefore, this study employs simulation methods to explore the influence mechanisms of gravity on the heat transfer performance in macrochannel and microchannel. Furthermore, an evaluation system is constructed to quantify the degree (<em>P_up</em>) and range (<em>D</em>) of localized heat transfer deterioration caused by gravity. Finally, the variations in evaluation factors under different gravity (<em>G</em>) and operational conditions are investigated. The results show that in both channels, near-wall high-temperature SCO₂ gas flows upward under gravity, forming blocking film near the top baseline. This self-circulation phenomenon deteriorates the heat transfer performance near the top baseline, while enhancing it along the rest of the channel wall. For the macrochannel, as the fluid advances, localized reverse-circulation occurs near the top baseline, further worsening heat transfer in this region, defined as the secondary deterioration phenomenon. However, in microchannel, the top and bottom baselines heat transfer gradually converges, and no secondary deterioration is observed. As <em>G</em> increases, <em>P_up</em> increases, <em>D</em> first decreases and then increases. The novelty of this work is the construction of the evaluation system and the comprehensive assessment of the SCO₂ heat transfer characteristics in horizontal tubes under anomalous gravity. The paper provides scientific basis for designing aerospace thermal control system. Additionally, it offers reference for heat transfer characteristics of other supercritical fluids in horizontal tubes under abnormal gravity.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103472"},"PeriodicalIF":5.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal radiation imaging and optical imaging detection Application in real-time monitoring of physiological status of long-distance runners: Real-time thermal imaging monitoring","authors":"Xin Liu ,&nbsp;Xueyuan Liu ,&nbsp;Shouxue Li ,&nbsp;Binquan Leng","doi":"10.1016/j.tsep.2025.103474","DOIUrl":"10.1016/j.tsep.2025.103474","url":null,"abstract":"<div><div>Long-distance running, as a sport with high demands on cardiopulmonary function and endurance, puts forward higher demands on athletes’ physical fitness and physiological state. This paper discusses the application potential of thermal radiation image and optical imaging technology in the real-time monitoring of long-distance runners physiological state, especially the real-time thermal imaging monitoring technology. The study uses high-precision thermal imaging camera and optical imaging equipment to acquire real-time thermal radiation images and optical images during the training and competition of long-distance runners. The thermal radiation image is preprocessed to improve the image quality. Then image analysis technology was used to extract key physiological parameters, and combined with athletes’ training intensity, ambient temperature, humidity and other data, the rule of body temperature changes reflected in thermal radiation images was analyzed, as well as the relationship between these changes and athletes’ physiological state. Based on the above analysis results, a real-time thermal imaging monitoring system is developed. The system can display the temperature distribution map of athletes in real time and give early warning to the physiological state of athletes according to the set threshold. The study found that in the process of long-distance running, the athlete’s body temperature will rise with the increase of exercise intensity, especially in the stage of greater cardiopulmonary function load, the temperature rise is more obvious. Through the analysis of thermal radiation images, the hot spots on the athlete’s body surface are successfully identified. These areas usually correspond to the active parts of blood circulation, and can be used as an important indicator to evaluate the physiological state of athletes.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103474"},"PeriodicalIF":5.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative performance analysis of finned and metal foam metal hydride reactors for efficient heating and cooling operations","authors":"Akshini More ,&nbsp;Abhishek Parida ,&nbsp;P. Muthukumar ,&nbsp;Pankaj Kalita ,&nbsp;Amaresh Dalal","doi":"10.1016/j.tsep.2025.103473","DOIUrl":"10.1016/j.tsep.2025.103473","url":null,"abstract":"<div><div>This paper presents the results of a 2-D axisymmetric simulation study that compares the finned reactor to the metal foam reactor, both of which carry the same amount of metal hydride. It also addresses the variation of metal foam reactor’s sorption performance due to different porosities and its heating/cooling effect at different absorption/desorption temperatures. The comparison of the fin and metal foam reactors is based on the amount of hydrogen absorbed/desorbed throughout the absorption/desorption processes and the variation in bed temperature. Additionally, the sorption behaviour of the metal foam reactor is analysed at different bed porosities (0.85–0.95). It is observed that there is a significant improvement in the performance of the sorption behaviour of the MH bed augmented with metal foam. However, compared to the finned reactor, the weight ratio and volumetric energy density are lower by 21.9% and 9.7%, respectively. Also, it is observed that the volume of the MH reactor increased by almost 11 % to accommodate an identical amount of alloy, thereby compromising the volumetric density. The metal foam porosity of 0.85 exhibits the best absorption and desorption performance. The metal foam reactor filled with Mm_0.2La_0.6Ca_0.2Ni₅ achieved a maximum cooling rate of 1.8 kW and a minimum bed temperature of 254.5 K for<!--> <!-->the desorption temperature of 308 K. For an absorption temperature of 278 K, the same alloy yielded a maximum heating rate of 1.1 kW. The study revealed that the<!--> <!-->metal foam reactors can be utilized for both cooling and heating applications.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103473"},"PeriodicalIF":5.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal environment characteristics and factory landscape design of precision manufacturing process based on human–machine collaboration","authors":"Du Juan","doi":"10.1016/j.tsep.2025.103468","DOIUrl":"10.1016/j.tsep.2025.103468","url":null,"abstract":"<div><div>In modern manufacturing, the thermal environment characteristics of factories play a crucial role in production efficiency and product quality. This article aims to explore the thermal environment characteristics in precision manufacturing processes based on human–machine collaboration, and construct a factory workshop human–machine collaboration network model. The model includes the principle of human–machine collaboration manufacturing model, adaptive human–machine interaction process, task matching algorithm, and collaborative information processing model. It analyzes the application and optimization of human–machine collaboration in temperature control from multiple dimensions. In the section of thermal environment simulation and analysis models, in-depth analysis of the thermal environment in the factory workshop is conducted by establishing heat control equations and applying temperature data denoising algorithms. The simulation results indicate that effective management of the thermal environment can significantly reduce temperature fluctuations and improve the stability of the manufacturing process. The landscape design analysis of precision manufacturing factories emphasizes the spatial layout characteristics and landscape configuration principles, including the green landscape planting mode that saves energy and cooling, and proposes to improve the microclimate of the workshop through reasonable plant layout, thereby further enhancing manufacturing efficiency. Therefore, the thermal environment characteristics of precision manufacturing processes based on human–machine collaboration not only have a direct impact on the production process, but also provide systematic theoretical support for the landscape design of factories. Future research can further deepen the integration of thermal environment management and landscape design, which is expected to enhance the sustainable development level of modern precision manufacturing industry.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103468"},"PeriodicalIF":5.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermo-mechanical coupling analysis in biological tissue with temperature-dependent physical parameters under moving heat source effects","authors":"Yingze Wang,&nbsp;Sheng Zhang,&nbsp;Zhaowei He","doi":"10.1016/j.tsep.2025.103470","DOIUrl":"10.1016/j.tsep.2025.103470","url":null,"abstract":"<div><div>The thermo-mechanical coupling behavior in biological tissue under a moving heat source is investigated, considering temperature-dependent physical parameters. A bio-thermo-mechanical model is developed by integrating the dual-phase lag mechanism with thermo-elasticity theory. Nonlinear governing equations are solved using Laplace transform and its numerical version, revealing time–space distributions of temperature, displacement, and thermal stress at varying heat source speeds. Thermal damage is assessed using the Arrhenius equation. Results show that thermo-elastic response is speed-dependent. As speed increases, peaks in temperature, displacement, thermal stress, and thermal damage factor decrease. Temperature-dependent parameters inhibit thermo-elastic response, with inhibition weakening for temperature and thermal damage but strengthening for thermal stress as speed rises.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103470"},"PeriodicalIF":5.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heat transfer and rheological analysis of a converging-diverging artery using the Prandtl viscoelastic model with chemical reactions","authors":"Saleh Chebaane ,&nbsp;E.O. Fatunmbi ,&nbsp;A.M. Obalalu ,&nbsp;Mohamed Bouzidi ,&nbsp;Turki Alkathiri ,&nbsp;Taoufik Saidani ,&nbsp;Amir Abbas","doi":"10.1016/j.tsep.2025.103460","DOIUrl":"10.1016/j.tsep.2025.103460","url":null,"abstract":"<div><div>The investigation of blood flow in a converging–diverging artery plays a crucial role in understanding cardiovascular disorders and optimizing biomedical devices such as drug delivery systems, surgical instruments, and nanoparticle-based treatments. This study analyzes the flow dynamics of non-Newtonian Jeffery-Hamel fluid with nanoparticles using the Prandtl viscoelastic model, which effectively captures the complex rheological behavior of blood. The mathematical model incorporates thermophoresis, Brownian motion, chemical reactions, space- and temperature-dependent energy generation, and frictional dissipation effects. The governing partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) via suitable similarity transformations and are numerically solved using the Spectral Collocation Method (SCM) for enhanced accuracy. The results reveal that the Prandtl material and viscosity parameters exhibit opposite effects on blood flow, with viscosity increasing resistance and slowing circulation. The inclusion of partial slip conditions leads to flow reversal and higher resistance forces along the arterial walls, a key factor in understanding arterial diseases. Furthermore, thermophoresis and Brownian motion significantly enhance heat and mass transfer, influencing nanoparticle diffusion and temperature regulation. For a diverging artery (χ &gt; 0), a substantial reduction in flow velocity, temperature, and nanoparticle concentration is observed, providing new insights into post-surgical arterial expansions and aneurysm formations. These findings offer critical implications for medical diagnostics, hyperthermia treatments, and nanoparticle-based drug delivery.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103460"},"PeriodicalIF":5.1,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the difference between tectonic coal and raw coal oxidative spontaneous combustion","authors":"Hailin Jia ,&nbsp;Kaixuan Zhou ,&nbsp;Xiaoju Zhao ,&nbsp;Rongkun Pan ,&nbsp;Ligang Zheng ,&nbsp;Jiangkun Chao ,&nbsp;Daimin Hu ,&nbsp;Lin Li","doi":"10.1016/j.tsep.2025.103469","DOIUrl":"10.1016/j.tsep.2025.103469","url":null,"abstract":"<div><div>Industrial and elemental analysis experiments, low temperature liquid nitrogen adsorption experiments, TG/DSC comprehensive thermal analysis experiments and programmed temperature oxidation experiments were carried out on the fractured tectonic coal and raw coal in the same coal seam. The experimental results demonstrated that, compared with the raw coal, the tectonic coal exhibited an increase in pore volume and specific surface area, along with good pore connectivity. During the endothermic and exothermic reaction stages, the endothermic heat of the tectonic coal was lower than that of the raw coal. The gas production trends of the two types of coal intersected with the curves of the consumption rates of CO and oxygen. Before the intersection temperature, the gas production rate and oxygen consumption rate of the tectonic coal were higher than those of the raw coal, while after that, the gas production rate and oxygen consumption rate of the raw coal were higher. Based on the growth curves of CO and C₂H₄ gas production, the temperatures of the tectonic coal and the raw coal were different at the end of the slow oxidation stage and the beginning of the fast oxidation stage. Generally speaking, there are significant differences between tectonic coal and raw coal in physical and chemical structure and oxidation spontaneous combustion characteristics. In the slow oxidation stage, the oxidizing ability of tectonic coal is stronger, while the raw coal reacts more fiercely in the rapid oxidation stage.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103469"},"PeriodicalIF":5.1,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Motion training recognition based on thermal radiation imaging system and object detection: Human motion thermal image monitoring","authors":"Jie Zhao,&nbsp;Chang Liu,&nbsp;Huisheng Hou","doi":"10.1016/j.tsep.2025.103467","DOIUrl":"10.1016/j.tsep.2025.103467","url":null,"abstract":"<div><div>A human motion monitoring method based on thermal radiation image system and target detection technology is developed. The heat distribution of human body in motion is captured by thermal image, and the real-time recognition and analysis of human motion is realized by combining image processing and target detection algorithm. A complete set of thermal radiation optical image monitoring system is designed in this study. A high-sensitivity thermal imaging camera is used to capture the thermal radiation images of the human body in the process of motion, and these images are then transmitted to the data acquisition unit for preliminary data collation and storage. The image processing module preprocesses the acquired thermal images, and the preprocessed images are fed into the object detection algorithm, which is based on the deep learning framework and can recognize and classify different movements of the human body. The thermal radiation image monitoring system can accurately capture the thermal image of the human body in different motion states, and identify the movement type of the athlete in real time through the target detection algorithm. The system has a strong ability to capture the details of actions, and can identify the beginning, progress and end stages of actions. Compared with traditional monitoring methods, the thermal radiation light image monitoring system has obvious advantages in terms of data accuracy and real-time performance. This method can not only provide high precision movement recognition, but also has the advantages of non-contact and real-time monitoring, which greatly improves the efficiency and accuracy of sports training monitoring.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103467"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial intelligence and robots promote energy management and financial cost optimization in hybrid manufacturing enterprises","authors":"Chang Miao,&nbsp;Yan Xue","doi":"10.1016/j.tsep.2025.103464","DOIUrl":"10.1016/j.tsep.2025.103464","url":null,"abstract":"<div><div>Against the backdrop of global environmental pressures and energy shortages, mixed manufacturing enterprises are facing a dual challenge of improving energy efficiency and reducing production costs. Currently, many enterprises are seeking to achieve more efficient production and management through automation and intelligent means. The aim of this study is to construct a comprehensive model that optimizes the energy management and financial costs of hybrid manufacturing enterprises through industrial robots and artificial intelligence technology, enhancing their economic benefits and market competitiveness. This article reviews relevant work and analyzes the application of industrial robots in the manufacturing process, including modeling of robotic arm motion, machining scheduling, and manufacturing reliability. Subsequently, an energy management model based on thermal science was designed and its effectiveness was evaluated, combined with energy-saving diagnostic tools to assess the actual effectiveness of energy management. Finally, how artificial intelligence technology can optimize financial costs was discussed, and a series of specific optimization strategies were proposed. Research has found that by applying advanced robotic arm motion modeling technology and intelligent scheduling algorithms, hybrid manufacturing enterprises can significantly improve production efficiency and reduce energy consumption. The designed energy management model effectively evaluates the energy usage of enterprises and improves energy utilization efficiency through energy-saving diagnostic measures. By combining artificial intelligence with financial cost optimization strategies, the financial performance of enterprises has also been significantly improved.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103464"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}