International Journal of Heat and Mass Transfer最新文献

{"title":"Research on roll profile thermal-force driving characteristics and joint control strategy in the multi-zone roll profile electromagnetic control technology","authors":"Tingsong Yang ,&nbsp;Meitao Jiang ,&nbsp;Haotang Qie ,&nbsp;Wenquan Sun ,&nbsp;Anrui He","doi":"10.1016/j.ijheatmasstransfer.2024.126498","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126498","url":null,"abstract":"<div><div>Roll profile electromagnetic control technology (RPECT) is a new roll gap shape control technology that can flexibly control the roll profile to meet the flatness control requirements of cold rolling mill. As basic control elements, electromagnetic sticks (ES) can drive the local zone bulging of electromagnetic control roll (ECR) to generate thermal-force contribution roll profiles. Due to the high order profile defects in the thin-gauge strip rolling process, the requirement of roll gap shape control in cold rolling mills is usually characterized by multi-zone and micro-scale. Therefore, a multi-zone roll profile electromagnetic control technology is proposed in this paper, which includes a multi-zone joint control strategy and a parameter preset method for basic control elements targeting roll profile. To conduct the parameterized impact analysis of stick distance and multi-stick control modes, a multi-zone joint control simulation model is established. Through the simulation analysis, the results show that it is feasible to use multiple basic control elements to adjust the multi-zone roll profile in the mechanism of action, and the total roll profile curve can be equivalent to the superposition of the individual bulging curve of different basic control elements with different space-time parameters. Meanwhile, the reasonable distance setting can effectively avoid the instability of thermal contribution roll profile control caused by too small distance between sticks and too strong thermal bulging driving. For the double-stick control mode or the three-stick control mode, using different temperature control method can assist ECR to realize the roll profile control goal that the low-order roll profile of the basic control element is superimposed to construct the high-order roll profile curve. According to strip flatness electromagnetic control experiment, the multi-zone joint control of RPECT can adjust the flatness defects above 100 IU to flat state, and can flexibly regulate local shape problems and control local buckling.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126498"},"PeriodicalIF":5.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745692","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}

{"title":"Experimental study on the flame characteristics of ceiling jet with various air entrainment conditions and vertical fire positions","authors":"Zihe Gao ,&nbsp;Chenguang Li ,&nbsp;Wenhao Yan ,&nbsp;Yaqi Fan ,&nbsp;Lin Jiang","doi":"10.1016/j.ijheatmasstransfer.2024.126467","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126467","url":null,"abstract":"<div><div>This paper presents an experimental investigation into the impact of varying the location of the fire source within a tunnel on the temperature and morphology of the ceiling jet in different directions. It proposes a method to predict the longitudinal and transverse flame length based on previous studies about flame morphology. The experiment is conducted on a reduced scale (1/8th) tunnel, with the fire source being a porous gas burner utilizing propane as fuel. It comprised two series of transverse fire source locations (against the wall or at the centerline of the tunnel). Each series included five heights, ranging from 0 m to 0.4 m, and 12 heat release rates, spanning from 5.67 kW to 85.10 kW. The results of the experiments demonstrated that elevating the fire source or positioning it against the wall facilitated the formation of ceiling jets. The limited transverse space of the tunnel leads to greater constraints on the transverse ceiling jets, resulting in a longer longitudinal ceiling jet than a transverse ceiling jet. And the longer longitudinal ceiling jets simultaneously result in a higher longitudinal temperature distribution under the ceiling. This study proposed the effective HRR <em>Q</em>_ef based on the assumption of a constant heat release rate per unit flame volume to analyze the flame length. And the dimensionless flame length <em>L</em>_f/<em>D</em> has been found to scale with the dimensionless effective HRR <em>Q</em>_ef^⁎ by the power of 2/5. This correlation is further validated by comparing it with the previous experimental data.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126467"},"PeriodicalIF":5.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745686","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}

{"title":"A unified mixed hp-finite element framework for modeling laser pulse heating processes in the refined thermodynamics","authors":"Balázs Tóth","doi":"10.1016/j.ijheatmasstransfer.2024.126456","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126456","url":null,"abstract":"<div><div>In this paper, new multi-field variational formulations are derived for solving the following thermodynamic models: (i) ballistic-conductive system, (ii) the Guyer–Krumhansl heat conduction model and (iii) the Maxwell–Cattaneo–Vernotte model as some models of the extended irreversible thermodynamic, handling the temperature, the heat flux and the current density of heat flux as independent field variables. Based on these variational approaches as mathematical background, a family of mixed <span><math><mrow><mi>h</mi><mi>p</mi></mrow></math></span>-version finite element methods, which is capable of reliably and efficiently modeling the temperature responses, is designed. The solutions provided by the constructed <span><math><mrow><mi>h</mi><mi>p</mi></mrow></math></span>-FE framework are illustrated for the following two heat pulse experiments as benchmark problems: (1) sinusoid laser pulse heating process and (2) rectangular (step-like) laser pulse train. It is shown that stable, oscillation-free temperature response functions can be obtained not only for the ballistic-conductive system and the Maxwell–Cattaneo–Vernotte model but also for the under-diffuse and the over-diffuse parameter settings of the Guyer–Krumhansl heat conduction model.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126456"},"PeriodicalIF":5.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key factors affecting the boiling heat transfer coefficient of FC-72 in saturated pool boiling using lotus-type porous copper","authors":"Kohei Yuki ,&nbsp;Kazuhisa Yuki ,&nbsp;Tetsuro Ogushi ,&nbsp;Masaaki Murakami ,&nbsp;Tomiyuki Numata ,&nbsp;Takuya Ide","doi":"10.1016/j.ijheatmasstransfer.2024.126477","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126477","url":null,"abstract":"<div><div>Boiling immersion cooling using dielectric liquids like FC-72 has shown promise for managing heat dissipation in semiconductor devices due to its low power consumption. However, the miniaturization and increasing operational currents of high-performance computer chips are driving heat fluxes towards 100 W/cm², exceeding the critical heat flux (CHF) of saturated FC-72 at atmospheric pressure by approximately sevenfold. To address this challenge, this study proposes a lotus-type porous copper (lotus copper) with a unidirectional pore structure designed to induce a \"breathing phenomenon\" that facilitates efficient vapor removal. This approach achieved a CHF of 110 W/cm², surpassing the target value. Beyond CHF enhancement, this study also focuses on improving the heat transfer coefficient (HTC) to minimize device operating temperatures. Initially, the influence of grooved heat-transfer surface structures on HTC was investigated without lotus copper. Results indicated that incipient boiling predominantly occurred on the top surfaces of the grooves, highlighting the significance of top surface area in determining HTC. Based on this finding, two groove structures were selected to evaluate the effectiveness of lotus copper integration. Furthermore, the study demonstrates that the optimal pore size for maximizing HTC is dependent on the heat flux. Large-pore lotus copper excels at high heat fluxes due to its ability to efficiently expel vapor and maintain the breathing phenomenon. Conversely, small-pore lotus copper enhances HTC under low heat flux conditions by increasing bubble nucleation sites at the interface between the lotus copper and the groove surface.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126477"},"PeriodicalIF":5.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical model for predicting the yield strength of metal materials under electrically-assisted deformation","authors":"Jiabin Yang ,&nbsp;Yanli Ma ,&nbsp;Pan Dong ,&nbsp;Yi He ,&nbsp;Jianzuo Ma ,&nbsp;Weiguo Li ,&nbsp;Zhaoliang Qu","doi":"10.1016/j.ijheatmasstransfer.2024.126496","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126496","url":null,"abstract":"<div><div>In this paper, based on the Force-Heat equivalence energy density principle, considering the thermal and athermal effects caused by current, the theoretical model for the current density dependent yield strength of metallic materials is developed. The novelty of this work lies in the fact that no adjustable fitting parameters were introduced during the modeling process, and both the Joule heating effect and the energy changes brought about by free electrons were considered in the contribution to the yield behavior of metallic materials, on which basis a critical energy density related to yield under the action of electric current was proposed. This model reveals the quantitative relationships between elastic modulus, steady-state temperature, electrical resistivity, thermal conductivity, current density, and yield strength under the action of current. The theoretical prediction results have achieved good consistency with experimental results. Furthermore, based on the principles of energy conservation and the assumption of steady-state, a theoretical expression was derived to predict the steady-state temperature caused by Joule heating. In addition, the results of the model analysis indicate that increasing the electrical resistivity of the material or decreasing its thermal conductivity can both facilitate plastic deformation and processing in electrically-assisted forming processes, especially at high current densities. This work provides an effective method for quantitatively evaluating the yield strength of metallic materials under the action of electric current, which can offer theoretical basis and optimization guidance for the extensive application and further development of electrically-assisted processes.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126496"},"PeriodicalIF":5.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745685","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}

{"title":"Thermal runaway behaviour of a cylindrical lithium-ion battery during charge and discharge processes: A comprehensive numerical study","authors":"Tengfei He ,&nbsp;Siddharth Gadkari ,&nbsp;Teng Zhang ,&nbsp;Zhirong Wang ,&nbsp;Jialong Liu ,&nbsp;Junling Wang ,&nbsp;Ning Mao ,&nbsp;Jinglong Bai ,&nbsp;Qiong Cai","doi":"10.1016/j.ijheatmasstransfer.2024.126499","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126499","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) may experience thermal runaway (TR) accidents during charge and discharge processes. To ensure the safe operation of batteries, it is very important to analyse the TR characteristics during charge and discharge processes. In this work, we have developed a coupled electrochemical thermal (ECT) – TR (ECT-TR) model for a commercial 18,650 type 2.6 Ah NCM523/graphite battery. This model allows for the examination of TR features under different ambient temperatures, effective heat transfer coefficients (<em>h</em>), and C-rates during both charge and discharge processes. We first analysed the temporal evolution of the battery's surface center temperature and the heat generated by chemical reactions under a spectrum of environmental variables. Subsequently, we introduce a battery risk map that delineates distinct zones, including the safe zone, battery chemical reaction zone, battery failure zone, and TR zone, across varying environmental conditions. The results suggest that the battery's TR risk during the charge process exceeds that during the discharge process, with both exhibiting reduced risk compared to that during the cycle process. However, it is noteworthy that the risk of accelerated battery aging due to chemical reactions is more pronounced in the discharge process compared to the charge process.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126499"},"PeriodicalIF":5.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745690","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}

{"title":"Dynamic analysis and optimization design of parallel/cross-feed MED-TVC systems considering fouling characteristics","authors":"Hao Zhang ,&nbsp;Yuanmin Zhang ,&nbsp;Xuewu Song ,&nbsp;Hongxia Zhao ,&nbsp;Wenxu Sun ,&nbsp;Lei Jia","doi":"10.1016/j.ijheatmasstransfer.2024.126490","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126490","url":null,"abstract":"<div><div>Multi-effect distillation with thermal vapor compression (MED-TVC) desalination systems are regarded as effective solutions to address freshwater scarcity. However, fouling within the evaporator significantly reduces freshwater production and restricts long-term operational efficiency. To this end, this study proposes a non-fouling operational optimization approach for MED-TVC systems utilizing artificial neural networks (ANN) and non-dominated sorting genetic algorithm II (NSGA-II). A dynamic model is developed to reveal the sensitivity of various input parameters concerning fouling formation, performance ratio (<em>PR</em>), and freshwater production cost (<em>FWPC</em>), whose accuracy is validated against field data. The ANN surrogate model and NSGA-II are employed to determine the optimal input parameters under Case-1 (random fouling) and Case-2 (non-fouling) scenarios, focusing on maximizing <em>PR</em> and minimizing <em>FWPC</em>. Additionally, a dynamic response analysis of four input disturbances is conducted under optimized non-fouling conditions to prevent fouling caused by parameter fluctuations. Results indicate that <em>PR</em> and <em>FWPC</em> are most sensitive to the motive steam flow rate (<em>m</em>_ms) and the number of effects (<em>N</em>), whereas fouling formation is more subject to the seawater flow rate (<em>m</em>_sw) and seawater temperature (<em>T</em>_sw). The ANN surrogate model demonstrates reliable predictive performance, achieving a maximum <em>PR</em> of 12.96 and a minimum <em>FWPC</em> of 1.157 $ m⁻³ following non-fouling optimization. This paper offers valuable insights into achieving non-fouling and efficient operation of the MED-TVC systems.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126490"},"PeriodicalIF":5.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745688","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}

{"title":"Coupled processes of tissue oxygenation and fluid flow in biphasic vocal folds","authors":"Rana Zakerzadeh ,&nbsp;Isabella McCollum ,&nbsp;Manoela Neves","doi":"10.1016/j.ijheatmasstransfer.2024.126494","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126494","url":null,"abstract":"<div><div>Fluid-structure interaction (FSI) between the glottal airflow and the poroelastic tissue of the vocal folds (VFs) causes the VFs to vibrate, resulting in voice production. Prior experimental studies have reported that biological transport processes within the VF tissue play a crucial role in disease initiation and localized lesions. Particularly, it has been observed that physiological conditions during phonation influence the interstitial flow within the tissue and the associated oxygen partial pressure, which corresponds with dysfunctions such as intermittent hypoxia. The goal of this research is to develop a multiphysics computational methodology that investigates oxygen transport characteristics within the VFs. By considering transient glottal airflow and a biphasic description for the tissue, this coupled framework combines an FSI model with a mass transport model to quantify key features contributing to VF oxygenation. The Navier-Stokes equations represent the aerodynamics in the larynx, while linear elasticity for tissue dynamics is considered. Additionally, oxygen transport is simulated using the advection-diffusion-reaction equation, and the interstitial flow is solved via the Brinkman equation. Physiological parameters such as oxygen metabolic consumption, subglottal lung pressure, and tissue permeability coefficient are varied; and their contribution to oxygen supply as well as to the liquid dynamics within the VF are quantified. It is found that filtration velocity is directly proportional to subglottal pressure and tissue permeability. Oxygen flow is also found to be inversely related to reaction rate, directly related to permeability, and not noticeably affected by subglottal pressure. The findings provide insight into the VF oxygenation pathways and the potential link with some pathological states such as hypoxia and localized lesions.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126494"},"PeriodicalIF":5.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745689","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}

{"title":"Experimental study of heat transfer and transport properties of granular material in indirectly heated rotary drums","authors":"Shih-Hao Chou ,&nbsp;Shu-San Hsiau ,&nbsp;Shang-Yu Liu","doi":"10.1016/j.ijheatmasstransfer.2024.126485","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126485","url":null,"abstract":"<div><div>The study of heat transfer in granular flows has extensive applications. This paper reports an experimental investigation of the heat transfer behavior in an indirectly heated rotary drum system with granular materials of various sizes. In this study, various particle motion behaviors were generated by applying inertial forces at different rotation speeds, and noncontact infrared thermography and particle tracking velocimetry were employed to quantify the thermal temperature and velocity distribution characteristics within the system. In addition, the heat transfer coefficient between the granular bed and the heated wall was determined using thermal balance equations, and the self-diffusion coefficient, which describes the diffusive motion of particles, was obtained by analyzing the random fluctuations of the particles. The results demonstrate that smaller particle sizes and increased rotation speed facilitate thermal temperature increase. Furthermore, a positive linear correlation between the heat transfer coefficient and the self-diffusion coefficient was observed, which implies that the forced thermal convection is a significant mechanism in enhancing the heat transfer behavior of granular systems.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126485"},"PeriodicalIF":5.0,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722377","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}

{"title":"Ice lensing in sandstone walls under monotonic and cyclic climatic conditions","authors":"You Wang,&nbsp;Falk K. Wittel","doi":"10.1016/j.ijheatmasstransfer.2024.126473","DOIUrl":"10.1016/j.ijheatmasstransfer.2024.126473","url":null,"abstract":"<div><div>A coupled one-dimensional (1D) thermo-mechanical model is developed to explore the ice lens formation in porous building materials, specifically sandstone, under changing climatic conditions. Heat conduction is coupled to an ice lens model to predict the formation and growth of ice lenses with the change of the temperature profile. Simultaneously, changes in the effective properties of the system due to evolving ice lenses are considered for calculating the temperature profile. Monotonic cooling and cyclic climatic conditions are applied to a sandstone wall to investigate the effects of different material parameters and boundary conditions on ice lensing. Triggering conditions for periodic ice lensing are identified. Finally, the periodic evolution of ice lenses (i.e., growing, melting, and re-freezing) is shown in the simulations under cyclic climatic conditions.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"238 ","pages":"Article 126473"},"PeriodicalIF":5.0,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}