Case Studies in Thermal Engineering最新文献_第6页

Accelerating and decelerating flow of radiatively Casson fluid between two permeable disks under convective boundary conditions 对流边界条件下两个可渗透圆盘间辐射卡森流体的加减速流动

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105795

A. Naeem, Z. Abbas, M.Y. Rafiq

The fully developed flow between two flat radial disks has much significance in industrial and technological fields. Therefore, this work deals with the hydromagnetic flow of incompressible Casson fluid between two permeable parallel disks under convective surface constraints. The impacts of thermal radiation and heat generation/absorption are also incorporated into the energy equation. Jacobi elliptic sine square function is used to derive the solution of non-linear differential equations by transforming the equations into an elliptic integral form and then by using a change of variables which simplifies the governing equations so that the solution can be derived easily. Thus, the Jacobi elliptic sine squared function is used to derive the analytical solution of accelerating and decelerating flow. The expression for temperature is also derived analytically. The graphical representations are given to depict the impacts of various significant parameters on velocity, temperature, and Nusselt number while the effect for torque and skin friction is given in tabular form. A parabolic velocity profile with maximum velocity at the center and minimum velocity at the surface of the disks is obtained. Accelerating velocity decreases with the increase in porosity, Casson fluid, and pressure gradient parameter while rising with the increment in magnetic effect while the decelerating velocity declines with the upsurge in all the parameters. The liquid temperature upsurges for the escalation in heat source/sink parameter while diminutions for thermal radiation parameter and Biot number. With the increase in Darcy's number, torque on the lower disk increases while decreasing for the upper disk while the skin friction shows the opposite behavior for both disks.

充分发展两平面径向圆盘之间的流动在工业和技术领域具有重要意义。因此，本文研究了对流面约束下不可压缩卡森流体在两个可渗透平行盘之间的磁流问题。热辐射和热产生/吸收的影响也被纳入能量方程。利用雅可比椭圆正弦平方函数，将非线性微分方程转化为椭圆积分形式，然后采用变量变换的方法简化控制方程，使求解变得容易。因此，利用雅可比椭圆正弦平方函数推导出了加速和减速流的解析解。对温度的表达式也进行了解析推导。给出了各种重要参数对速度、温度和努塞尔数的影响的图形表示，而对扭矩和表面摩擦的影响以表格形式给出。得到了最大速度在圆盘中心，最小速度在圆盘表面的抛物线速度分布。加速速度随孔隙度、卡森流体和压力梯度参数的增大而减小，随磁效应的增大而增大，减速速度随各参数的增大而减小。热源/汇参数的增加使液体温度升高，热辐射参数和Biot数的增加使液体温度降低。随着达西数的增加，下盘的转矩增大，上盘的转矩减小，两盘的表面摩擦力则相反。

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引用次数: 0

Numerical analysis of absorber tube shapes in PCM-integrated parabolic trough solar collectors pcm集成抛物面槽太阳能集热器吸收管形状的数值分析

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105783

Binit Kumar, Abhishek Awasthi, Jungho Lee, Yongseok Jeon

This study examines the impact of absorber tube geometry on the thermal performance of parabolic trough collectors (PTCs) integrated with phase change materials (PCMs). Addressing a research gap, it compares circular, elliptical, and pear-shaped absorber tubes using solar salt as PCM and water as the heat transfer fluid. The study aims to identify optimal designs for improving thermal efficiency and system scalability in solar energy applications. Results showed that the pear-shaped tube outperformed the circular design, achieving 6–8 °C higher outlet temperatures, a 7 % increase in instantaneous power, and a 15-min longer heat retention time. While the elliptical tube exhibited lower overall performance, its horizontal orientation enhanced power output by 5 % compared to the vertical orientation. These findings underscore the critical role of absorber tube geometry in optimizing PCM-integrated PTCs. The pear-shaped absorber tube, with its superior heat flux concentration and heat transfer efficiency, demonstrated significant potential for enhancing system performance. Its optimized geometry makes it a promising candidate for scalable and efficient solar energy solutions in industrial and domestic applications, offering advancements in sustainable energy utilization.

本研究考察了吸收管几何形状对与相变材料（pcm）集成的抛物槽集热器（ptc）热性能的影响。为了解决研究空白，它比较了圆形，椭圆形和梨形吸收管，使用太阳能盐作为PCM和水作为传热流体。该研究旨在确定太阳能应用中提高热效率和系统可扩展性的最佳设计。结果表明，梨形管优于圆形管，出口温度提高6-8°C，瞬时功率提高7%，保温时间延长15分钟。虽然椭圆管的整体性能较低，但其水平方向比垂直方向提高了5%的功率输出。这些发现强调了吸收管几何形状在优化pcm集成ptc中的关键作用。梨形吸收管具有较好的热流密度和换热效率，在提高系统性能方面具有较大的潜力。其优化的几何形状使其成为工业和家庭应用中可扩展和高效太阳能解决方案的有希望的候选者，为可持续能源利用提供了进步。

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引用次数: 0

Optimizing heat transfer in a finned rectangular latent heat storage system using response surface methodology 用响应面法优化矩形翅片潜热蓄热系统的传热

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2024.105701

Mohammadreza Ebrahimnataj Tiji , Sina Rezaei , Khashayar Hosseinzadeh , Sami Kaplan , Pouyan Talebizadehsardari , Amir Keshmiri

This work explores how fin design optimization can improve heat transfer in latent heat thermal energy storage (LHTES) systems. Several fin designs, angles, and arrangements are examined using the Response Surface Methodology (RSM) and the Taguchi technique to optimize energy storage performance. For this purpose, a two-dimensional numerical model is generated to simulate and then optimize the behaviour of the melting process. The numerical simulations are performed using the enthalpy-porosity approach, wherein the phase transition behaviors are effectively modeled by incorporating the energy, momentum, and continuity equations into one analytical framework using the finite volume method. To investigate the effects of find design on the process of melting, three different fin configurations were adopted: Symmetry, Reversed Symmetry, and Left-Sided. Other parametric variations included optimization studies on the height-to-width ratio of the chamber, the angle of the fins, and the distance from the floor that gave the best heat storage performances. The findings show that, in comparison to other designs, a symmetric fin structure with greater fin surface areas at the bottom of the chamber greatly increases melting rates, heat transfer efficiency, and shortens melting times by up to 57 %. Using RSM, the optimal fin arrangement is determined, resulting in a heat exchanger height-to-width ratio of 1.15, a fin angle of 4.31°, and a fin distance of 15.56 mm from the chamber floor. The heat storage rate of the optimum case is 15 % higher than that of the reference case before the optimization and after the initial parametric study. The thermal performance of LHTES systems is improved by this optimized design, increasing their suitability for renewable energy applications.

这项工作探讨了翅片设计优化如何改善潜热储热系统的传热。使用响应面方法（RSM）和田口技术检查了几种鳍的设计，角度和布置，以优化储能性能。为此，生成了一个二维数值模型来模拟和优化熔化过程的行为。数值模拟采用焓孔方法进行，其中相变行为通过使用有限体积法将能量、动量和连续性方程合并到一个分析框架中来有效地建模。为了研究翅片设计对熔化过程的影响，采用了对称、反对称和左侧三种不同的翅片构型。其他参数变化包括优化研究的高宽比的房间，翅片的角度，和距离地板的最佳蓄热性能。研究结果表明，与其他设计相比，对称翅片结构在腔室底部具有更大的翅片表面积，大大提高了熔化速度和传热效率，并缩短了熔化时间，最高可达57%。利用RSM，确定了最佳翅片布置，得到换热器高宽比为1.15，翅片角度为4.31°，翅片距离室底板15.56 mm。优化后的储热率比优化前和初始参数研究后的参考情况高15%。这种优化设计提高了LHTES系统的热性能，增加了它们对可再生能源应用的适用性。

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引用次数: 0

Performance of twisted tape absorber-based photovoltaic thermal systems in clockwise and counterclockwise configurations 顺时针和逆时针配置下基于扭曲带吸收器的光伏热系统的性能

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2024.105723

Abdalrahman M.O. Al-Karboly , Adnan Ibrahim , Anas Al-Tarabsheh , Anwer B. Al-Aasam , Ali H.A. Al-Waeli , Ahmad Fazlizan , Kamaruzzaman Sopian

The main limitation of conventional photovoltaic thermal (PVT) collectors is the method of establishing heat transfer to extract trapped heat in the photovoltaic (PV) module. Therefore, this study improved the electrical efficiency of PV modules by introducing a novel twisted tube absorber-based PVT system in anticlockwise (PVT-CCW) and clockwise (PVT-CW) configurations. Numerous solar irradiance levels (200 W/m², 400 W/m², 600 W/m², 800 W/m², and 1000 W/m²) were examined using an indoor solar simulator, a nanofluid containing water and 0.5 vol% SiC, and mass flow rates from 0.005 kg/s to 0.04 kg/s. This analysis involved investigating various factors to demonstrate the improved performance of PVT-CCW configuration, including thermal and electrical efficiencies, temperature, and current-voltage (I-V) with PV properties. Exceptional peak thermal (82.36 %) and electrical efficiencies (10.5 %) indicated a significant 38 % improvement in electricity output than traditional PV systems. This study presents a novel (PVT) system that combines counterclockwise (CCW) twisted tape technology with SiC nanofluids. The use of SiC nanofluids enhances thermal conductivity and disrupts the thermal boundary layer, significantly improving heat transfer. These findings advance the understanding of PVT system performance and open new avenues for optimizing renewable energy technologies, making this research a valuable contribution to the field.

传统的光伏热集热器的主要限制是建立传热的方法来提取光伏（PV）模块中的热量。因此，本研究通过引入一种新型的基于扭曲管吸收器的PVT系统，在逆时针（PVT- ccw）和顺时针（PVT- cw）配置下提高了光伏组件的电效率。使用室内太阳模拟器、含有水和0.5 vol% SiC的纳米流体、质量流量从0.005 kg/s到0.04 kg/s，测试了多种太阳辐照水平（200 W/m2、400 W/m2、600 W/m2、800 W/m2和1000 W/m2）。该分析涉及调查各种因素，以证明PVT-CCW配置的改进性能，包括热效率和电效率、温度和具有PV特性的电流-电压（I-V）。异常峰值热（82.36%）和电效率（10.5%）表明发电量比传统光伏系统显著提高38%。本研究提出了一种将逆时针（CCW）扭曲带技术与SiC纳米流体相结合的新型PVT系统。碳化硅纳米流体的使用增强了导热性，破坏了热边界层，显著改善了传热。这些发现促进了对PVT系统性能的理解，并为优化可再生能源技术开辟了新的途径，使这项研究对该领域做出了有价值的贡献。

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引用次数: 0

Comparative study of thermohydraulic performance in mini-channel heat sink systems: Multi-objective optimization and exergy considerations 小通道热沉系统热水力性能比较研究：多目标优化和火用考虑

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2024.105722

Zouheyr Noui , Mohamed Si-Ameur , Nabil Bessanane , Amel Djebara , Adnan Ibrahim , Muhammad Amir Aziat Bin Ishak , Raheem K. Ajeel , Sharul Sham Dol

A numerical investigation is undertaken, employing a 3D conjugated heat transfer model to examine the impact of geometric configurations and hydrodynamical parameters on the overall thermal resistance and pumping power in mini-channels heat sinks. The aim lies in its holistic approach, integrating the non-uniform section of the mini-channel, the impact of the inlet velocity, the energy and exergy analysis, multi-objective optimization and performance evaluation criteria (PEC) evaluations, and the consideration of metal Galinstan and Cu-water nanofluid working fluids. The parametric analysis highlighted metal Galinstan as the best coolant for the five configurations involved in the present study. Furthermore, The PEC results indicate that the best performance is achieved by the Converged-Diverged Mini-channel (CDMC)heat sink. CDMC configuration with metal Galinstan performs well in terms of exergy evaluations and shows a better average temperature distribution with a maximum temperature of about 328K. The optimal inlet velocity (

U_{i n}

= 0.21 m/s) is determined on the basis of the pumping power and thermal resistance profiles. The optimization process is based on the impact of the mini-channel's maximum width on the PEC. It is shown that the PEC increases with the maximum width of the CDMC and the highest (PEC = 1.31) is obtained at a maximum width of 0.95 mm.

采用三维共轭传热模型，研究了几何构型和流体动力参数对微通道散热器整体热阻和泵送功率的影响。该方法综合考虑了微通道的非均匀截面、入口速度的影响、能量和火用分析、多目标优化和性能评价准则（PEC）评价，并考虑了金属Galinstan和铜水纳米流体的工作流体。参数分析强调金属Galinstan是本研究中涉及的五种配置的最佳冷却剂。此外，PEC结果表明，聚敛发散小通道（CDMC）散热器的性能最好。金属Galinstan的CDMC结构在火用评价方面表现良好，平均温度分布较好，最高温度约为328K。根据泵送功率和热阻分布确定了最佳入口速度（Uin = 0.21 m/s）。优化过程是基于小通道的最大宽度对PEC的影响。结果表明，随着CDMC的最大宽度增大，PEC增大，在最大宽度为0.95 mm时达到最大值（PEC = 1.31）。

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引用次数: 0

Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel 利用氧化铝-水纳米流体在螺旋搅拌容器中的强化传热

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2024.105740

Abdulrazzaq Abdzaid Hussein , Ahmed Chead Auda , Ansam F. Showard , H.I. Dawood

This study aims to investigate the heat transfer process of Al₂O₃ water-nanofluid using an agitated vessel with coils. The experiment was conducted using three volumetric concentrations of nanofluid (0.15, 0.25, and 0.35 vol%). The effects of propeller speeds ranging from 2 to 12 revolutions per second (r.p.s) and temperature from 30 °C to 80 °C were tested with cooling water flow rates (1.4 and 1.8 l/min). The Nusselt number was evaluated in relation to the nanofluid's volumetric concentration, viscosity, Prandtl, and Reynolds number. The results showed a significant increase in the heat transfer coefficient with an improvement of 74.5 % compared to the base water when the nanofluid concentration was increased to 0.35 vol%. This enhancement is attributed to the increased of thermal conductivity of the nanofluid due to the addition of Al₂O₃ nanoparticles. Besides, smaller Al₂O₃ nanoparticle sizes ranging from 12.3 to 17.5 nm resulted in improved stability and suspension efficiency. Propeller speed at 12 r.p.s led to an increase in the heat transfer coefficient by 11.8 %. Moreover, when the temperature reached 80 °C and the cooling water flow rate was reduced to 1.4 l/min, the results showed an increase in the heat transfer coefficient by 19.3 % and 9.8 %, respectively.

研究了Al₂O₃水纳米流体在带盘管的搅拌容器中的传热过程。实验使用三种体积浓度的纳米流体（0.15、0.25和0.35体积%）进行。在冷却水流量（1.4和1.8升/分钟）下，对螺旋桨速度（2到12转/秒）和温度（30°C到80°C）的影响进行了测试。努塞尔数与纳米流体的体积浓度、粘度、普朗特尔数和雷诺数有关。结果表明，当纳米流体浓度增加到0.35 vol%时，与基础水相比，传热系数提高了74.5%。这是因为加入了Al₂O₃纳米粒子，提高了纳米流体的导热性。此外，较小的Al2O₃纳米颗粒尺寸（12.3到17.5 nm）提高了稳定性和悬浮效率。12转/秒的螺旋桨速度使传热系数增加了11.8%。当温度达到80℃，冷却水流量降低到1.4 l/min时，换热系数分别提高了19.3%和9.8%。

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引用次数: 0

Thermodynamics and solar radiative analysis in Jeffery-Hamel flow through non-parallel channel by novel improved residual power series method 用改进的剩余幂级数法分析非平行通道Jeffery-Hamel流的热力学和太阳辐射

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105767

Mohamed Bouzidi , Mohsin Ul Haq , Ikram Ullah , Saira Shukat , Hijaz Ahmad , Mohammad Mahtab Alam , Hamid Khan , Marouan Kouki

The Jeffery-Hamel flow through convergent/divergent channel is examined in this article. It is assumed that the fluid is viscous and incompressible and flow across the non-parallel walls. Viscous fluid is further taken as an electrically conducting. Impact of Lorentz force is consider to thoroughly examine the fluid movement. Energy dissipation and solar radiation features are addressed for comprehensive analysis of thermal field. Furthermore, shrinking/stretching channels are considered for more practical application. The governing system of partial differential equations can be transformed into ordinary differential equations (ODEs) using suitable transformations. The novel IRPSM, which is sami-numerical method, is utilized to work out on the solutions of obtained system of ODEs. This method has capability to accurately predict and successfully solve such non-linear realistic problem. Validation of current method is made with other techniques and shows a reasonable correspondence. Velocity and temperature are graphically visualized for different relevant parameters. Furthermore, the local skin friction coefficient and the rate of heat transfer are examined for numerous parameters. It is observed that increasing thermal radiation parameter leads to a substantial increase in the temperature profile. Additionally, the heat transfer rate is 15 % more in diverging channel when compared with converging channel.

本文研究了收敛/发散通道中的杰弗瑞-哈默尔流。假定流体是粘性的、不可压缩的，并沿非平行壁面流动。粘性流体进一步被认为是导电的。考虑了洛伦兹力的影响，以全面考察流体的运动。为了对热场进行综合分析，研究了能量耗散和太阳辐射特征。此外，收缩/拉伸通道被认为是更实际的应用。偏微分方程的控制系统可以通过适当的变换转化为常微分方程。采用半数值方法，对得到的二阶微分方程系统进行求解。该方法具有准确预测和成功解决此类非线性现实问题的能力。用其他方法对现有方法进行了验证，并显示出合理的对应关系。速度和温度以图形方式显示不同的相关参数。此外，局部表面摩擦系数和传热率进行了许多参数的检查。结果表明，随着热辐射参数的增大，温度剖面的变化幅度较大。此外，发散通道的换热率比收敛通道高15%。

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引用次数: 0

Numerical assessment of heat transfer and entropy generation of a mixed convection ferrofluid flow under the effect of a non-uniform magnetic field 非均匀磁场作用下混合对流铁磁流体传热和熵产的数值计算

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105788

Kamel Zitouni , Messaouda Boumaaza , Lakhdar Aidaoui , Yahia Lasbet , Houssam Eddin Abdellatif , Shan Ali Khan , Yazid Chetbani , Ahmed Belaadi , Ibrahim M.H. Alshaikh , Djamel Ghernaout

This study investigated the flow characteristics, entropy generation, and thermal transfer of convection in a vertical and horizontal three-dimensional square duct filled with ferrofluid. The influence of periodic transverse and partial magnetic fields (MFs) along the walls of a duct having a constant flux density on the flow pattern is explored. The analysis is carried out by examining various geometric and physical parameters, i.e., the Grashof number (Gr) (40 ≤ Gr ≤ 4 × 105), the Hartmann number (Ha) ranged from 0 to 50, Reynolds number (Re = 200) and volume fraction of Fe₃O₄ nanoparticles (Ø = 0.02). The effect of the various factors in the problem on heat transfer presented by Nusselt number (Nu) and the friction coefficient along the entropy generation have been discussed graphically. Findings show that when the magnetic force is applied transversely (γ = π/2, γ = π/4) under both full and partial circumstances, the total entropy generation decreases with rising Ri and Ha. On the other hand, when it is applied longitudinally (γ = 0), it grows. The opposite tendency is noted for the Nusselt number and therefore the heat exchange. Using the horizontal position leads to accelerated heat transfer, while entropy production is reduced.

本文研究了一个垂直和水平方向的方形管道内的流动特性、熵产和对流换热。研究了恒流密度管道壁面周期性横向磁场和局部磁场对管道流型的影响。通过考察纳米Fe3O4颗粒的Grashof数（Gr）（40≤Gr≤4 × 105）、Hartmann数（Ha）（0 ~ 50）、雷诺数（Re = 200）和体积分数（Ø = 0.02）等几何物理参数进行分析。讨论了用努塞尔数（Nu）和摩擦系数表示的沿熵产过程的各种因素对传热的影响。结果表明：在完全和部分情况下，当横向施加磁力（γ = π/2, γ = π/4）时，总熵产随着Ri和Ha的增加而减小；另一方面，当纵向施加时（γ = 0），它会增长。努塞尔数和热交换的趋势是相反的。使用水平位置导致加速传热，而熵产减少。

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引用次数: 0

Influence of lateral ambient wind speed on fire smoke behavior in tunnel with unpowered ventilation caps shaft 横向环境风速对无动力通风顶盖竖井隧道火灾烟气特性的影响

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105776

Weikang Liang , Yuan Wang , Zhonghao Wen , Min Hao , Ru Zhou , Juncheng Jiang

As the use of unpowered ventilation caps continues to grow, it has the potential to be used in vertical shaft natural ventilation tunnel. However, smoke control mechanism of tunnel fire with the influence of unpowered ventilation caps need further study. This study explores how lateral ambient wind speed affects the behavior of smoke during tunnel fires with unpowered ventilation caps shaft. A 1:15 scale model tunnel with a vertical shaft is used to analyze lateral and longitudinal wind effects. And, the difference of smoke behavior in tunnel with or without unpowered ventilation caps shaft is compared. Unpowered ventilation caps reduce the average maximum ceiling temperature elevation by 10 % near the shaft compared to shafts without them. As lateral ambient wind speed increases, the maximum temperature elevation decreases gradually. Additionally, unpowered ventilation caps improve smoke exhaust efficiency, doubling the mass flow rate, which further increases with higher lateral wind speeds. A model is developed to predict the relationship between lateral wind speed and smoke exhaust efficiency for shafts with unpowered ventilation caps. The results can provide valuable insights for fire safety design in naturally ventilated tunnels and for evaluating the potential use of unpowered ventilation caps.

随着无动力通风帽的使用不断增长，它在竖井自然通风隧道中具有应用潜力。但无动力通风帽影响下隧道火灾的防烟机理有待进一步研究。本研究探讨了横向环境风速如何影响无动力通风帽竖井隧道火灾中烟雾的行为。采用1:15比例尺的竖井模型，分析了横向风和纵向风的影响。并比较了无动力通风帽竖井与无动力通风帽竖井隧道烟气特性的差异。与没有动力通风帽的竖井相比，无动力通风帽使竖井附近的平均最高天花板温度升高降低了10%。随着横向环境风速的增加，最高温度海拔逐渐降低。此外，无动力通风帽提高了排烟效率，使质量流量增加一倍，随着横向风速的增加，质量流量进一步增加。建立了无动力通风罩竖井侧风速与排烟效率关系的模型。研究结果可以为自然通风隧道的消防安全设计和评估无动力通风帽的潜在用途提供有价值的见解。

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引用次数: 0

Solidification behavior of copper/aluminum composites in twin-roll casting under electric fields 电场作用下双辊铸造铜/铝复合材料的凝固行为

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.csite.2025.105803

Mingyang Zhang, Jiaruo Li, Fuqiang Chu, Yanhui Feng

Electric field is widely used in the preparation of metallic materials to enhance their properties. In this study, we simulated the solidification behavior of twin-roll casting (TRC) copper/aluminum composites (Cu/Al) using finite volume method. A comparative examination of the temperature distribution, fluid dynamics, and instantaneous cooling rate, is conducted considering scenarios both with and without the influence of an electric field. The introduction of the electric field leads to an elevation in temperature within the molten pool, thereby affecting the solidification process and extending the duration of vortex maintenance. The transient cooling rate is demonstrated to decrease, and the asymmetry in heat transfer within the middle and lower sections is correspondingly reduced. As the electric potential increases, the heat flux can be better transferred laterally, which diminishes the temperature gradient at the Cu/Al interface. In addition, the application of an appropriate electric potential ensures that the sump depth ratio (SDR) is in a reasonable range while enhancing the reaction length ratio (RLR). This enhancement improves the atomic bonding strength at the interface while preserving the continuity of the TRC process. These results are expected to provide a theoretical basis for the development and optimization of the Cu/Al TRC technology.

为了提高金属材料的性能，电场被广泛应用于金属材料的制备中。本研究采用有限体积法模拟了双辊铸造（TRC）铜/铝复合材料（Cu/Al）的凝固行为。在考虑有电场影响和没有电场影响的情况下，对温度分布、流体动力学和瞬时冷却速率进行了比较研究。电场的引入导致熔池内温度升高，从而影响凝固过程，延长涡流维持时间。瞬态冷却速率降低，中下部传热不对称性相应减小。随着电势的增大，热流能更好地横向传递，减小了Cu/Al界面处的温度梯度。此外，适当的电势的应用，在提高反应长度比（RLR）的同时，保证了池深比（SDR）在合理的范围内。这种增强提高了界面上的原子键合强度，同时保持了TRC过程的连续性。这些结果有望为Cu/Al TRC技术的发展和优化提供理论依据。

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引用次数: 0