International Communications in Heat and Mass Transfer最新文献_第10页

Efficiency enhancement of photovoltaic solar panels using hybrid cooling systems with cross-shaped fins and porous foam 利用交叉翅片和多孔泡沫混合冷却系统提高光伏太阳能板的效率

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109331

M. Sheikholeslami , M.K.A. Al-Bujasim

{"title":"Efficiency enhancement of photovoltaic solar panels using hybrid cooling systems with cross-shaped fins and porous foam","authors":"M. Sheikholeslami , M.K.A. Al-Bujasim","doi":"10.1016/j.icheatmasstransfer.2025.109331","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109331","url":null,"abstract":"<div><div>This study conducts a simulation to boost the efficiency of a monocrystalline photovoltaic (PV) panel by integrating advanced cooling techniques with optical concentration using reflectors. A 12-cell, 30 W PV panel was outfitted with parabolic reflectors on both sides, achieving a concentration ratio of 3 to enhance the incident solar radiation. To manage the resulting heat, a nanofluid cooling system was applied using five copper riser pipes and larger headers for uniform flow distribution. The working fluid consisted of water with silver nano-powders at a volume fraction of 0.015 (dimensionless), ensuring a homogeneous mixture. Thermal performance was further improved with cross-shaped fins and high-porosity aluminum foam (porosity = 0.914). Four configurations were analyzed: nanofluid only, nanofluid with fins, nanofluid with foam, and nanofluid with both enhancements. Simulations were conducted under laminar flow for Reynolds numbers of 400–1600 using ANSYS FLUENT 19.2 and the Discrete Ordinates model to determine solar flux. A multilayer PV structure was modeled, and solar intensity was defined via user-defined functions. Validation against existing study yielded strong agreement (<0.12 % error), and grid independence was confirmed with over 5.5 million mesh elements. Key results showed that at <em>Re</em> = 400, fins improved electrical and thermal efficiency by 3.6 % and 9.12 %, while foam led to gains of 4.8 % and 12.11 %. At Re = 1600, the convective heat transfer increased by a factor of 1.25 with fins and 7.44 with foam. The highest total efficiency of 62.44 % occurred at <em>Re</em> = 600 with foam, and the maximum performance evaluation criterion reached 3.14. These results underscore the effectiveness of combining nanofluids, porous foam, and fins in mitigating thermal issues and improving the performance of concentrated PV systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109331"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595882","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

Anomalous thermal stresses induced in an infinitely long circular cylinder with accelerated thermal conductivity 热导率加速的无限长圆柱体中引起的异常热应力

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109297

Emad Awad , Alaa A. El-Bary , Hamdy M. Youssef

{"title":"Anomalous thermal stresses induced in an infinitely long circular cylinder with accelerated thermal conductivity","authors":"Emad Awad , Alaa A. El-Bary , Hamdy M. Youssef","doi":"10.1016/j.icheatmasstransfer.2025.109297","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109297","url":null,"abstract":"<div><div>It is well known that the temperature and the inner structure of materials significantly impact the thermal conduction phenomena. For example, the thermal conductivity deviates from the Fourier behavior in certain materials that contain impurities and/or inhomogeneities. A recent study by Awad and Samir, J. Phys. A: Math. Theor. 57 (2024), has presented a fractional theory of quasi-static thermoelasticity based on a crossover heat conduction model that describes the accelerated transition of thermal conductivity from low values within the short-time domain to large values in the long-time domain. The present study generalizes this version of fractional thermoelasticity by including the inertial term. Further, it investigates the effect of such a crossover heat conduction model on the generated stresses in an infinitely long circular cylinder subject to uniform heat on its cylindrical surface. Analytical solutions in the Laplace domain are derived and using the Riemann sum series, numerical results for the temperature propagation, the stresses, and the displacement are recovered. The effect of crossover heat conduction is studied through comparisons with the low and high thermal conduction cases.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109297"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595878","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

Two-phase flow mechanism of methane in 3D reconstructed porous media under high- pressure flow 高压下三维重构多孔介质中甲烷两相流动机理研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109312

Jianan Ge , Yue Li , Xin Wang , Juan Shi , Cheng Xiong , Zhenqian Chen

{"title":"Two-phase flow mechanism of methane in 3D reconstructed porous media under high- pressure flow","authors":"Jianan Ge , Yue Li , Xin Wang , Juan Shi , Cheng Xiong , Zhenqian Chen","doi":"10.1016/j.icheatmasstransfer.2025.109312","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109312","url":null,"abstract":"<div><div>The flow characteristics of porous media in rocket engine thrust chamber injector panels exhibit distinct differences exposing to cold or combustion-induced thermal environments. Focusing on methane phase transition dynamics under high-pressure cold conditions, a mesoscale-macroscale coupled framework is established to elucidate the underlying two-phase flow mechanisms within porous media. By computed tomography scanning experiments and fractal method, the pore structural parameters and fractal permeability of porous media were investigated to provide macroscopic results. A three-dimensional non-orthogonal multi-relaxation pseudo-potential Lattice Boltzmann model for multiphase flow is adopted to overcome numerical instability at high liquid-gas density ratios (<em>ρ</em><sub><em>l</em></sub><em>/ρ</em><sub><em>g</em></sub> ≈ 60). The model precisely captures methane two-phase interface and different mass transfer phenomena. In the injection pressure range of 1–9 MPa, the methane in gas and liquid phases inside the porous media presents an overall non-uniform distribution, depending on the pore structure characteristics of the flow channel and the injection pressure. In addition, the highest velocity distribution uniformity is achieved at an injection pressure of 5 MPa. Finally, the analysis established quantitative correlations between mesoscopic permeability and fractal results (validated within 20% deviation) through lattice-physical space conversion, coupling pore-scale dynamics to engineering applications.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109312"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597040","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

Multi-criteria optimization of spring insert geometries during a single-phase heat transfer process in tubes 管内单相传热过程中弹簧插片几何形状的多准则优化

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109313

Eryk Czachurski , Beata Niezgoda-Żelasko

{"title":"Multi-criteria optimization of spring insert geometries during a single-phase heat transfer process in tubes","authors":"Eryk Czachurski , Beata Niezgoda-Żelasko","doi":"10.1016/j.icheatmasstransfer.2025.109313","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109313","url":null,"abstract":"<div><div>Experimental-numerical article on improving the efficiency of single-phase tube heat exchangers with spring inserts used to intensify the heat transfer process in a vertical tube series system and the multi-criteria optimisation of the geometrical parameters of the inserts. Experimental studies have indicated a 41–250 % increase in heat transfer coefficients with a 74–480 % increase in pressure drop. The numerical part of the study included the modelling of thermal-fluid processes (Ansys-Fluent) and the solution for the optimisation problem (control point generation – DOE, statistical analysis – ANOVA, Non-dominated Sortet Genetic Algorithm II). The optimal solution for the maximisation of heat transfer increase ratio (ε<sub>α</sub>) and minimisation of flow resistance (ε<sub>Δ<em>p</em></sub>) as well as entropy generation increase ratios (ε<sub>S</sub>) was obtained for the values: <em>Re</em> = 3369, <em>d</em><sub>p</sub>/<em>d</em><sub>i</sub> = 0.95, <em>d</em><sub>s</sub>/<em>d</em><sub>i</sub> = 0.11, <em>h/d</em><sub>i</sub> = 2.75 (<em>d</em><sub>p</sub>, <em>d</em><sub>i</sub>, <em>d</em><sub>s</sub> outer coil, inner tube, spring rod diameters, <em>h</em>- coil pitch). Regardless of the <em>Re</em> value, the optimum coil diameters of spring inserts amount to 95 % of the tube's internal diameter, whereas optimum diameters of the rode of the spiral are 11–12 % of the tube's internal diameter. The novelty of the article is the proposed functional relationships for determining the optimal geometric parameters of spring inserts for different values of Reynolds numbers.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109313"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595427","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

Lattice Boltzmann study on sessile droplet deformation and evaporation in the presence of an alternating current electric filed 交流电场作用下液滴变形和蒸发的晶格玻尔兹曼研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109303

Shifan Ouyang , Zhentao Wang , Jue Wang , Longwei Zeng , Qingming Dong , Junfeng Wang

{"title":"Lattice Boltzmann study on sessile droplet deformation and evaporation in the presence of an alternating current electric filed","authors":"Shifan Ouyang , Zhentao Wang , Jue Wang , Longwei Zeng , Qingming Dong , Junfeng Wang","doi":"10.1016/j.icheatmasstransfer.2025.109303","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109303","url":null,"abstract":"<div><div>The sessile droplet evaporation is a common phenomenon in nature, scientific research, and industrial applications. The electric field is extensively incorporated to enhance heat and mass transfer of sessile droplet, owing to its significant influence on droplet deformation and evaporation. In present work, the deformation and evaporation of sessile droplet have been numerically studied in the presence of an alternating current (AC) electric field adopting the lattice Boltzmann method (LBM). The results indicate that the sessile droplet periodically deforms with the variation of electric potential. In the meantime, interface charge density, interface velocity and solid-liquid heat flux periodically vary with the periodical electric field. The droplet deformation weakens with an increase in alternating frequency as the difference between electromagnetic relaxation time and hydrodynamic characteristic time. The sinusoidal electric field shows the best effects on deformation and convection compared to sharp and pulse form as interface velocity and charge density are the highest. For droplet evaporation, the alternating frequency and waveform of electric field is not important on evaporation because the average heat flux changes little with the electric potential, where the average contact line is constant even through alternating frequency varies, resulting in a tiny variation of droplet life time.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109303"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595880","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

Effects of thermally induced bubbles on the dielectric performance of fluorinated liquid under intense electric field 强电场作用下热诱导气泡对氟化液体介电性能的影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109283

Zhihao Zhou , Sihui Hong , Zan Wu , Qingquan Qiu , Kuang Sheng

{"title":"Effects of thermally induced bubbles on the dielectric performance of fluorinated liquid under intense electric field","authors":"Zhihao Zhou , Sihui Hong , Zan Wu , Qingquan Qiu , Kuang Sheng","doi":"10.1016/j.icheatmasstransfer.2025.109283","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109283","url":null,"abstract":"<div><div>Fluorinated liquids have emerged as effective coolants due to their thermal and electrical performance, which play a significant role in immersion cooling of data center and power electronic devices. However, the electrical breakdown characteristics of such liquids in vapor–liquid two-phase states are not fully understood, especially the mechanisms associated with the role of thermally induced bubbles in deteriorating dielectric properties. Here, we conducted breakdown experiments for one kind of fluorinated liquid under various heat transfer conditions in a non-uniform alternating electric field to figure out its dielectric properties in two-phase states, and performed simulations to probe into the interactions between the thermally induced bubble and the external electric field. Analyses verify that the boiled fluorinated liquid possesses a weaker breakdown strength as expected, with bubbles distorting electric fields, becoming dielectric weak points, and creating vapor channels between electrodes. These findings provide a better understanding of the breakdown characteristics of fluorinated liquid in two-phase vapor–liquid states, and they lay the foundation for the design of electrical insulation systems of power electronics using immersion cooling.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109283"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595881","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

A data-driven reduced-order model based on TCN-GRU and POD for temperature field rapid prediction of space nuclear reactor 基于TCN-GRU和POD的空间核反应堆温度场快速预测数据驱动降阶模型

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109333

Shuo Liu , Wenshu Li , Zhao Jin , Chenglong Wang , Suizheng Qiu , Mengmeng Xi , Yiying Bao

{"title":"A data-driven reduced-order model based on TCN-GRU and POD for temperature field rapid prediction of space nuclear reactor","authors":"Shuo Liu , Wenshu Li , Zhao Jin , Chenglong Wang , Suizheng Qiu , Mengmeng Xi , Yiying Bao","doi":"10.1016/j.icheatmasstransfer.2025.109333","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109333","url":null,"abstract":"<div><div>Reduced-order model (ROM) offers a powerful and efficient tool for design and optimization of complex systems by simplifying high-dimensional systems, which significantly reduces computational complexity while retaining critical physical features. The traditional ROM cannot accurately capture the detailed features of transient physical fields. In recent years, the booming development of temporal neural networks would be useful to overcome this shortcoming. In this work, a data-driven ROM was created based on the Temporal Convolutional Network (TCN) and Gated Recurrent Unit (GRU) with proper orthogonal decomposition (POD) approach. Then the established data-driven ROM was applied to the rapid prediction of three-dimensional transient temperature field in space lithium-cooled fast reactor core. With the POD approach, main features of the transient temperature field are preserved using only 2 or 3 modes. Then the hidden time-sequence variations of the feature coefficients were captured and trained using TCN-GRU model to realize the prediction of the feature coefficients at different moments. The three-dimensional temperature field of space lithium-cooled core can be quickly reconstructed by a linear combination of reduced-order basis and feature coefficients. By comparing the predicted results with Computational Fluid Dynamics (CFD) simulation results, the data-driven ROM was validated. The maximum absolute errors of temperature fields for the two transient cases are 4.11 K and 1.14 K, respectively, demonstrating that the developed data-driven ROM can accurately and rapidly predict the temperature field of the space lithium-cooled core at different moments. This work contributes a new measure for on-orbit transient operation analysis and provides a valuable reference for the construction of digital twins for space nuclear power.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109333"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595968","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

Effect of fin geometry on the thermal performance of a heat exchanger 翅片几何形状对换热器热性能的影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109338

Nahum Y. Godi

{"title":"Effect of fin geometry on the thermal performance of a heat exchanger","authors":"Nahum Y. Godi","doi":"10.1016/j.icheatmasstransfer.2025.109338","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109338","url":null,"abstract":"<div><div>This paper investigates the effect of implementing intricate fin geometries in a microchannel heat exchanger. The study aims to reduce internal resistance within the micro heat sink. In this study, nine distinct fin configurations are simulated within a 3D environment. Circular, square, and rectangular fins are modeled in ANSYS Fluent Workbench for performance analysis. A constant heat flux is applied at the base of the system, while water, with a Reynolds number ranging from 400 to 550, is imposed as the working fluid under steady-state, forced convection, laminar flow regime. The numerical scheme is validated against experimental data prior to simulating the system. The numerical results indicate that the peak temperature in the full-drilled circular fins decreased by 9.11 K, equivalent to decline in resistance of 19.9 %. However, in the square-fin configuration, the half-drilled square fins outperformed both the solid and full-drilled square fins, with thermal improvements of 3.5 % and 1.8 %, respectively. In the design featuring rectangular fins, the half-drilled rectangular fin configuration achieved a 9.4 % temperature reduction, 20.9 % decrease in internal resistance, and the highest Nusselt number of 5.8 % at 55.9 kPa. Compared to the finless design, all finned configurations exhibited a 15.4 % enhancement in thermal performance.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109338"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595428","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

Endoreversible quantum heat engine affected by strong coupling with thermal reservoir 内可逆量子热机受热源强耦合影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109309

Sajjad Hashemi Abasabadi, Sayyed Yahya Mirafzali, Hamid Reza Baghshahi

{"title":"Endoreversible quantum heat engine affected by strong coupling with thermal reservoir","authors":"Sajjad Hashemi Abasabadi, Sayyed Yahya Mirafzali, Hamid Reza Baghshahi","doi":"10.1016/j.icheatmasstransfer.2025.109309","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109309","url":null,"abstract":"<div><div>This study investigates the performance of an endoreversible quantum heat engine operating under strong coupling with thermal reservoirs. Departing from classical heat transfer laws, we employ qubits as external heat-transfer mediators and apply the Reaction-Coordinate Polaron Transform (RCPT) method to effectively address the strong coupling effects between the qubits and thermal baths. Using this approach, we capture the profound impact of strong coupling on power output, ecological function, and entropy production. Our analysis identifies an optimal intermediate coupling regime that maximizes both power output and efficiency. This regime balances enhanced energy transfer with the onset of dissipative losses, while excessive coupling induces entropy generation and reduces performance. Notably, strong coupling enables significant power output even at low qubit energy gaps, a distinct advantage over weak coupling regimes. Additionally, we explore the ecological function as an alternative optimization criterion, finding that it peaks at a slightly higher efficiency than that corresponding to maximum power output. Our results highlight that optimal engine performance occurs at efficiencies below the Carnot limit but above the classical Curzon-Ahlborn predictions under strong quantum interactions. These findings suggest encouraging implications for quantum technologies, particularly in nanoscale energy harvesting and refrigeration at a strong coupling regime.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109309"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595879","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

The role of near-wall active vortex generators on thermal-hydrodynamic efficiency of corrugated wall channels 近壁面主动涡发生器对波纹壁面通道热流动力效率的影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-07-10 DOI: 10.1016/j.icheatmasstransfer.2025.109339

O. Damanafshan, S.E. Habibi, Y. Amini

{"title":"The role of near-wall active vortex generators on thermal-hydrodynamic efficiency of corrugated wall channels","authors":"O. Damanafshan, S.E. Habibi, Y. Amini","doi":"10.1016/j.icheatmasstransfer.2025.109339","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109339","url":null,"abstract":"<div><div>Enhancing heat transfer in confined geometries plays an essential role in the design of compact and high-efficiency thermal systems. Among these, wavy-wall rectangular channels attracted particular interest due to their extended surface area and improved mixing characteristics. Despite their advantages, such geometries still face challenges in achieving optimal thermal performance while minimizing pressure losses. To address these challenges, various passive and active flow control methods have been explored, with vortex generators (VGs) showing significant potential in promoting convective heat transfer. In particular, active vortex generators placed near the wall can manipulate the boundary layer and induce strong vortex structures that enhance mixing and thermal transport. This study introduces a novel design involving Near-Wall Active Vortex Generators (NWAVG) embedded in a wavy-wall rectangular channel. The goal is to investigate how different movement patterns of NWAVGs affect heat transfer enhancement and frictional loss. Two distinct actuation patterns are considered under a constant Reynolds number of 790, based on the hydraulic diameter of the channel. Results indicate that NWAVGs can enhance the local Nusselt number by up to 190 % compared to an empty wavy channel, while the optimized configuration achieves a maximum hydrothermal efficiency of 1.24.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109339"},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595969","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