International Journal of Thermal Sciences最新文献_第2页

Self-guided filtering slow feature thermography for subsurface defect detection in composite materials 自导向滤波慢特征热成像在复合材料表面缺陷检测中的应用

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijthermalsci.2025.110077

Kaixin Liu , Yuan Yao , Yi Liu , Ping Chen

{"title":"Self-guided filtering slow feature thermography for subsurface defect detection in composite materials","authors":"Kaixin Liu , Yuan Yao , Yi Liu , Ping Chen","doi":"10.1016/j.ijthermalsci.2025.110077","DOIUrl":"10.1016/j.ijthermalsci.2025.110077","url":null,"abstract":"<div><div>Infrared thermography (IRT) is widely used for non-destructive measurement and testing of composite materials and heritage conservation. Thermal data post-processing techniques playing a crucial role in improving accuracy and efficiency. In this work, a self-guided filtering-based slow feature thermography (GF-SFT) method is proposed for subsurface defect assessment of composites. It processes and analyzes time-series thermal imaging data of inspection targets from both temporal and spatial dimensions. First, a self-guided filtering method enhances the thermal image sequence in the spatial domain, preserving critical image features (e.g., edges) while reducing noise and suppressing irrelevant details, thereby improving the data quality. Subsequently, the slow feature analysis technique isolates stable background components in the thermal signal over time while distinguishing rapidly changing features associated with subsurface defects. The proposed framework is validated through an evaluation of filtering performance and a Fourier-based interpretation of fast- and slow-varying thermal features. A test case on a carbon fiber reinforced polymer demonstrates the effectiveness of the GF-SFT method in detecting subsurface defects.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110077"},"PeriodicalIF":4.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying particle and wave effects in phonon transport of pillared graphene nanoribbons 柱状石墨烯纳米带声子输运中的粒子和波效应量化

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijthermalsci.2025.110067

Shixian Liu , Zhicheng Zong , Fei Yin , V.I. Khvesyuk , Nuo Yang

引用次数: 0

Machine learning regression modeling of liquid jet impingement cooling: Based on computational fluid dynamics (CFD) 液体射流冲击冷却的机器学习回归建模：基于计算流体力学（CFD）

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijthermalsci.2025.110086

Amirhossein Kholghi , Farzad Azizi Zade , Hamid Niazmand , Mohammad Sardarabadi

{"title":"Machine learning regression modeling of liquid jet impingement cooling: Based on computational fluid dynamics (CFD)","authors":"Amirhossein Kholghi , Farzad Azizi Zade , Hamid Niazmand , Mohammad Sardarabadi","doi":"10.1016/j.ijthermalsci.2025.110086","DOIUrl":"10.1016/j.ijthermalsci.2025.110086","url":null,"abstract":"<div><div>A comprehensive CFD and Machine Learning Regression Models (MLRM) investigation optimized circular Jet Impingement cooling. Jet impingement, influenced by several parameters, is widely studied in industry. This study used a design of experiments based on the Taguchi Method (TM) to determine the efficient number of CFD simulations. Numerical simulations generated a dataset to analyze nozzle diameter, nozzle height, flow rate, and different fluids (water, nanofluids, and Microencapsulated PCM), validated with experimental data. Data is cleaned and split into training, validation, and test sets. Validation and training data are augmented, while test data remained unchanged. After feature selection, 6 singular and 6 ensemble RMs are trained to identify the best models, followed by developing a novel hybrid model. The hybrid model achieved a total R<sup>2</sup> = 0.90 and test R<sup>2</sup> = 0.84. Applicability and sensitivity analysis validated the hybrid model, followed by a TM-based analysis of variance. Results revealed that flow rate is the most crucial factor (51.5%) followed by the fluid type (45.8%). Finally, several optimization methods are applied, with the Nelder-Mead method predicting the optimum case (with total error = 10%): Re = 5961.6 to result in an h<sub>average</sub> = 4.6 (W/cm<sup>2</sup> °C) given a heat flux of 64 W/cm<sup>2</sup>.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110086"},"PeriodicalIF":4.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Double cut design of horizontal phase change heat storage device: experimental and numerical study 卧式相变蓄热装置的双切口设计：实验与数值研究

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijthermalsci.2025.110097

Jiayi Gao , Rukun Hu , Xuan Liu , Xingdan Wang , Xiaohu Yang , Bengt Sundén

{"title":"Double cut design of horizontal phase change heat storage device: experimental and numerical study","authors":"Jiayi Gao , Rukun Hu , Xuan Liu , Xingdan Wang , Xiaohu Yang , Bengt Sundén","doi":"10.1016/j.ijthermalsci.2025.110097","DOIUrl":"10.1016/j.ijthermalsci.2025.110097","url":null,"abstract":"<div><div>Latent heat thermal energy storage (LHTES) systems are used to store heat efficiently and reliably. However, the thermal performance of LHTES systems is often limited by their shape. This study aims to improve the heat transfer efficiency of horizontal LHTES storage units through shape optimization by systematically investigating three resection designs: bottom-crosscut, sidecut, and a novel double-cut. The influence of three cutting methods on their thermal performance is studied through experimental analysis and numerical simulation. The double-cut design enhances natural convection in the upper LHTES unit while minimizing the refractory area at the bottom, addressing the critical challenge of uneven heat distribution. The results show that compared with the ring type, the complete melting time distribution of LHTES with the three cutting methods is reduced by 73.93 %, 47.41 %, and 77.22 %, and the average Nusselt number (<span><math><mrow><mover><mrow><mi>N</mi><mi>u</mi></mrow><mo>‾</mo></mover></mrow></math></span>) is increased by 154.71 %, 69.46 %, and 179.52 %, respectively. Due to the better thermal performance of the three cutting methods, the geometrical parameters of the double-cut LHTES are optimized by response surface method (RSM). The optimized configuration reduces the melting time by 81.88 % compared to the ring type and 28.96 % compared to the original double-cut design, significantly enhancing heat transfer efficiency. This study provides valuable design insights and theoretical basis for improving the thermal performance of LHTES systems.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110097"},"PeriodicalIF":4.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal management and heat transfer enhancement through heatlines visualization in a moving-wall chamber: effects of shear, heater geometry, and nanoparticle suspension 热管理和传热增强通过热线可视化在移动壁室：剪切，加热器几何形状和纳米颗粒悬浮液的影响

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijthermalsci.2025.110098

Bilal El Hadoui , Youness Ighris , Mourad Kaddiri , Jamal Baliti

{"title":"Thermal management and heat transfer enhancement through heatlines visualization in a moving-wall chamber: effects of shear, heater geometry, and nanoparticle suspension","authors":"Bilal El Hadoui , Youness Ighris , Mourad Kaddiri , Jamal Baliti","doi":"10.1016/j.ijthermalsci.2025.110098","DOIUrl":"10.1016/j.ijthermalsci.2025.110098","url":null,"abstract":"<div><div>The interactions among the shear and floatability forces, geometrical aspects of the heater, and the enhanced properties of nanoparticle suspension are essential in optimizing heat transfer performance within complex chambers, which is beneficial in electronic cooling applications. This study employs the lattice Boltzmann method to investigate mixed convection in a Cu/water nanofluid-filled chamber, where a heater with different lengths is placed on the left sidewall, and the upper wall is subjected to an external moving force. The results are validated experimentally with previous studies. The effective viscosity and conductivity are expressed by means of an experimental model to increase the accuracy of the study. The results, presented through isotherms, streamlines, heatlines, flow intensity, and Nusselt number variations, reveal that heat transfer is maximized when the nanofluid is at the optimum loading of <em>φ</em> = 1.7 %–2 %, reaching up to 5.76 % of enhancement compared to water. The enhanced viscosity and conductivity effect become positive on the heat transfer rate and flow intensity when the speed of the moving wall is high, where it changes from 0.88 % of deterioration to 6.02 % of enhancement for a small heater. Furthermore, the increase in the heater length and temperature difference and the decrease in nanoparticle diameter improve the dynamic and thermal performances, resulting in the maximum enhancement of 11.84 % at <em>Pe</em> = 80 and <em>φ =</em> 2 %. While a higher nanoparticle volume fraction may lead to a decline in heat transfer efficiency, even below that of pure water, depending on other parameters.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110098"},"PeriodicalIF":4.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting heat transfer of wedged latticework cooling structure under high thermal load using GA-BP neural network 基于GA-BP神经网络的高热负荷楔格冷却结构传热预测

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijthermalsci.2025.110100

Binye Yu , Xingwei Li , Jie Li , Shi Bu , Ao Wang , Weigang Xu

{"title":"Predicting heat transfer of wedged latticework cooling structure under high thermal load using GA-BP neural network","authors":"Binye Yu , Xingwei Li , Jie Li , Shi Bu , Ao Wang , Weigang Xu","doi":"10.1016/j.ijthermalsci.2025.110100","DOIUrl":"10.1016/j.ijthermalsci.2025.110100","url":null,"abstract":"<div><div>Wedged latticework is a competitive cooling scheme to resolve the ultra-high thermal load in the trailing edge of modern gas turbine blade. Its performance is closely related to numerous structural parameters, making heat transfer prediction a complicated issue. This paper built a GA-BP neural network for the purpose of fast predicting heat transfer coefficient of wedged latticework cooling channel. Upon analyzing the influence of wedge angle (<em>α</em>), rib-cross angle (<em>β</em>), rib-to-spacing ratio (<em>t</em>/<em>W</em><sub><em>t</em></sub>) and height of channel entrance (<em>H</em><sub>1</sub>) on heat transfer coefficient <em>h</em>, an orthogonal design database is established which is then used as the training set to optimize the BP network based on genetic algorithm (GA). The network is validated by experimental measurement on a wind tunnel test facility. The results indicated that GA-BP network can reach an accuracy of 91.200 %, better than the 87.689 % accuracy of BP network. Furthermore, the proposed GA-BP network owns superior model stability and generalization, making faster heat transfer prediction and more convenient cooling design.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110100"},"PeriodicalIF":4.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient behavior of fuzzy PID-controlled transpiration cooling with phase change under dynamic thermal environments 动态热环境下模糊pid控制的相变蒸腾冷却瞬态行为

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijthermalsci.2025.110088

Fei He , Yatong Zhao , Ling Zhao , Xiaorong Wu , Wenjie Dong , Shupeng Xie , Caiyi He

{"title":"Transient behavior of fuzzy PID-controlled transpiration cooling with phase change under dynamic thermal environments","authors":"Fei He , Yatong Zhao , Ling Zhao , Xiaorong Wu , Wenjie Dong , Shupeng Xie , Caiyi He","doi":"10.1016/j.ijthermalsci.2025.110088","DOIUrl":"10.1016/j.ijthermalsci.2025.110088","url":null,"abstract":"<div><div>To ensure the adaptability and dependability of transpiration cooling with phase change under complex dynamic thermal environments, this study establishes a closed-loop control model of fuzzy PID-controlled transpiration cooling with phase change, numerically investigates the transient evolution of liquid-gas two-phase transport and heat transfer within porous structure under coupled control, and systematically evaluates the response characteristics of conventional PID and fuzzy PID control strategies under different sampling intervals, target temperatures, feedback positions, and thermal conditions. The results indicate that, compared to PID control, fuzzy PID control demonstrates enhanced capabilities in mitigating temperature overshoot, shortening adjustment time, and alleviating positive and negative feedback misalignment. The behavior of phase change exerts a considerable influence on the response characteristics of closed-loop control system, and better control can be achieved when the target temperature substantially exceeds the phase transition temperature or the feedback position is located in the superheated vapor region. Furthermore, fuzzy PID control exhibits superior adaptability and robustness under all typical and real thermal conditions. This work provides novel insights for optimizing coolant control systems in transpiration cooling under complex thermal environments.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110088"},"PeriodicalIF":4.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of rising motion characteristics of microbubbles in a heated quiescent salt solution 热静盐溶液中微泡上升运动特性分析

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-21 DOI: 10.1016/j.ijthermalsci.2025.110092

Junming Zhang, Xutong Lang, Dong Liu, Xiaxin Cao, Ming Ding

{"title":"Analysis of rising motion characteristics of microbubbles in a heated quiescent salt solution","authors":"Junming Zhang, Xutong Lang, Dong Liu, Xiaxin Cao, Ming Ding","doi":"10.1016/j.ijthermalsci.2025.110092","DOIUrl":"10.1016/j.ijthermalsci.2025.110092","url":null,"abstract":"<div><div>Microbubbles hold promising potential in applications across fields such as wastewater treatment, chemical reactions, and the nuclear industry. In this study, we analyzed the trend of microbubble rising velocity using a high-resolution high-speed camera in a sodium sulfate solution at 60 °C and found that the rising velocity trend is non-monotonic. The efficient mass transfer capability of microbubbles led to diameter reduction during ascent, which in turn influenced the rising velocity. The microbubble rising motion was divided into three stages: initial acceleration, deceleration, and secondary acceleration. Stokes' law and its modified formulas did not fully predict the rising velocity observed experimentally, showing accuracy only at the early stage of the secondary acceleration phase. This study interprets the velocity variation from the perspective of diameter fluctuation during microbubble ascent, elucidating the applicability of Stokes' law for microbubbles in 60 °C saline solution. By performing power correction on Stokes' law, the prediction accuracy was improved, and the velocity data of microbubbles during the secondary acceleration stage fell within the prediction interval with 90 % confidence. Additionally, microbubble collision and aggregation events were observed during the experiments; however, they were rare (less than 0.01 %) and had negligible effects on the statistical data of microbubble motion velocity.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110092"},"PeriodicalIF":4.9,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular dynamics simulations of bubble nucleation characteristics of nano-groove surface 纳米沟槽表面气泡成核特性的分子动力学模拟

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-21 DOI: 10.1016/j.ijthermalsci.2025.110093

Yuting Jia, Yusi Song, Jingtao Wang, Xiaosong Cui, Hongliang Chang

{"title":"Molecular dynamics simulations of bubble nucleation characteristics of nano-groove surface","authors":"Yuting Jia, Yusi Song, Jingtao Wang, Xiaosong Cui, Hongliang Chang","doi":"10.1016/j.ijthermalsci.2025.110093","DOIUrl":"10.1016/j.ijthermalsci.2025.110093","url":null,"abstract":"<div><div>In order to investigate the effect of groove shape on bubble nucleation, the effect of smooth wall, rectangular groove, trapezoidal groove and tenon groove walls on bubble nucleation were investigated by molecular dynamics simulation. The results show that the nucleation time of groove wall surface is earlier than that of smooth wall surface, in which the nucleation time of rectangular groove wall surface is the earliest and the bubble nucleation volume of trapezoidal groove wall surface is the fastest increasing rate. The temperature of argon atoms within the tenon groove rises at the quickest rate,but due to the strong interaction potential energy inside the groove, the nucleation time is significantly later than the other groove walls, and the bubble nuclei are not generated inside the groove, so it is difficult for the argon atoms inside the groove to transform into gaseous argon atoms. In addition, the temperature of argon atoms in the grooves on the wall surface of various grooves is always higher than that in other areas counted, and the temperature of argon atoms in the tenon grooves is higher than that in other grooves, and the temperature of argon atoms in other grooves is almost equal.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110093"},"PeriodicalIF":4.9,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation on the cooling performance of lithium-ion battery using liquid cooled-plate with integrated grooves and secondary microchannel structures 采用集成沟槽和二次微通道结构的液冷板对锂离子电池冷却性能进行数值研究

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-06-20 DOI: 10.1016/j.ijthermalsci.2025.110094

Yiyang Lai , Junling Ding , Lijun Liu

{"title":"Numerical investigation on the cooling performance of lithium-ion battery using liquid cooled-plate with integrated grooves and secondary microchannel structures","authors":"Yiyang Lai , Junling Ding , Lijun Liu","doi":"10.1016/j.ijthermalsci.2025.110094","DOIUrl":"10.1016/j.ijthermalsci.2025.110094","url":null,"abstract":"<div><div>An efficient battery thermal management system serves as a critical safeguard for preserving the operational efficiency, reliability, and safety of lithium-ion battery, especially within elevated thermal environments. This study introduces an innovative liquid cooled-plate design that combines groove and secondary microchannel, and employs three-dimensional numerical simulation techniques to structurally optimize the cooled-plate structure to enhance the thermal regulation efficacy for lithium-ion battery. Initially, by evaluating the performance of various groove configurations, we found that rectangular groove exhibits excellent heat transfer capability. Furthermore, secondary microchannels were integrated between the rectangular grooves to enhance the heat transfer capacity. Numerical results indicate that a microchannel with 0.5 mm width is the optimal choice. Ultimately, the impact of structural optimization on the thermal regulation performance of the system was evaluated. The results illustrate that under the condition of a mass flow rate of 25 g/s, the proposed geometry can increase overall heat transfer performance by 57.1 % and reduce the maximum battery temperature by 0.59 K relative to conventional straight-channel design. This work provides new ideas and perspectives regarding the design of liquid cooled-plate for battery thermal management system.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"217 ","pages":"Article 110094"},"PeriodicalIF":4.9,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0