International Journal of Heat and Mass Transfer最新文献

筛选
英文 中文
Thermocapillary instabilities in thin liquid films on a rotating cylinder 旋转圆筒上液体薄膜的热毛细不稳定性
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-09 DOI: 10.1016/j.ijheatmasstransfer.2025.127033
Souradip Chattopadhyay , Amar K. Gaonkar , Hangjie Ji
{"title":"Thermocapillary instabilities in thin liquid films on a rotating cylinder","authors":"Souradip Chattopadhyay ,&nbsp;Amar K. Gaonkar ,&nbsp;Hangjie Ji","doi":"10.1016/j.ijheatmasstransfer.2025.127033","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127033","url":null,"abstract":"<div><div>Thin liquid films flowing along rotating cylinders are crucial in many industrial processes such as centrifugal thin-film evaporators. The thermocapillary instability in these films often leads to operational inefficiencies and stability concerns. To improve the design and operation of these systems under thermal effects, achieving a uniform distribution of the coating layer is crucial. This challenge becomes even more complex when the cylinder is simultaneously heated and rotated. A comprehensive understanding of these coupled effects is essential for uplifting the efficiency and effectiveness of these systems in practical applications. In this study, we present a model for a thin liquid film flowing along the inner surface of a rotating cylinder subjected to nonuniform heating. Using a long-wave approximation to describe interface dynamics, our study formulates a full lubrication equation incorporating thermal boundary conditions, nonlinear curvature terms, and rotational effects. Linear stability analysis indicates that the Rayleigh-Plateau instability can be suppressed by rotating the cylinder. When the wall is uniformly heated, the reinforced instability can also be suppressed by introducing rotation. Additionally, we investigate the influence of thermocapillarity and rotation on wave speed and the stability of traveling wave solutions. Furthermore, we numerically study the self-similar solution in plug formation and obtain the scaling <span><math><msup><mrow><mfenced><mrow><msub><mrow><mi>t</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>−</mo><mi>t</mi></mrow></mfenced></mrow><mrow><mn>1</mn><mo>/</mo><mn>5</mn></mrow></msup></math></span>, where <span><math><msub><mrow><mi>t</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> is the choke time. We find the exponent 1/5 is independent of rotation but <span><math><msub><mrow><mi>t</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> increases with higher rotation. Numerical simulation reveals that nonuniform heating exacerbates surface wave instability and plug formation (or choke behavior), while cylinder rotation can potentially delay plug formation. Our analysis shows that an increasing Biot number can induce choke behavior in a uniformly heated cylinder, but the introduction of rotation can delay the onset of choking.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127033"},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799729","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
Additively manufactured inconel 718 vapor chamber with conformal micro-pillar wicks: A low temperature concept demonstration 增材制造inconel 718蒸汽室与保形微柱芯:低温概念演示
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-09 DOI: 10.1016/j.ijheatmasstransfer.2025.127056
Adnen Mezghani , Corey J. Dickman , Edward W. Reutzel , Abdalla R. Nassar , Douglas E. Wolfe
{"title":"Additively manufactured inconel 718 vapor chamber with conformal micro-pillar wicks: A low temperature concept demonstration","authors":"Adnen Mezghani ,&nbsp;Corey J. Dickman ,&nbsp;Edward W. Reutzel ,&nbsp;Abdalla R. Nassar ,&nbsp;Douglas E. Wolfe","doi":"10.1016/j.ijheatmasstransfer.2025.127056","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127056","url":null,"abstract":"<div><div>Effective thermal management is crucial in hypersonic flight (Mach &gt; 5) due to extremely high aerodynamic heating located at leading edges, and both passive and active thermal protection systems (TPS) have been used to address this. Among passive TPS options are two-phase thermal management systems, such as heat pipes (HP) and vapor chambers (VC), which can realize a considerable reduction in steady-state leading edge temperature owing to their extremely high heat transfer capability. This leads to reduction in complexity and cost of TPS structure and material requirements. However, conventional HP and VC fabrication methods require multiple manufacturing and assembly steps, limiting their design space. Alternatively, utilizing additive manufacturing (AM) for fabrication can bypass conventional manufacturing limitations and enable structural members with intricate internal channels and topologically optimized shapes. AM can, therefore, unveil a larger design space for tailored leading edge concepts with an integrated passive TPS. This work demonstrates the design, fabrication and testing of a notional methanol-filled Inconel 718 VC with a conformal micro-pillar wick fabricated via laser-beam powder bed fusion AM. This serves as a proof of concept and establishes a foundation for design and fabrication of high-temperature additively manufactured sodium-filled leading edge VCs.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127056"},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799731","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
Multiphase flow and interface dynamics in a blast furnace hearth: Effects of slag viscosity and coke diameter 高炉炉膛内多相流动与界面动力学:炉渣粘度和焦炭直径的影响
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-09 DOI: 10.1016/j.ijheatmasstransfer.2025.127085
Dong Jo Lee , Hyun Sik Yoon , Adarsh Rajasekharan Nair , Min IL Kim
{"title":"Multiphase flow and interface dynamics in a blast furnace hearth: Effects of slag viscosity and coke diameter","authors":"Dong Jo Lee ,&nbsp;Hyun Sik Yoon ,&nbsp;Adarsh Rajasekharan Nair ,&nbsp;Min IL Kim","doi":"10.1016/j.ijheatmasstransfer.2025.127085","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127085","url":null,"abstract":"<div><div>This study numerically investigates the effects of slag viscosity (<span><math><msub><mi>μ</mi><mi>s</mi></msub></math></span>) and coke diameter (<span><math><msub><mi>D</mi><mi>P</mi></msub></math></span>) on the behavior of gas-slag and slag-iron interfaces, as well as the mass flow rates of slag and iron, in a three-dimensional (3D) full-scale blast furnace hearth model with four tapholes undergoing tapping and plugging cycles. This study introduces new perspectives by focusing on the bifurcation behavior of interface evolution, the classification of two distinct regimes in temporal levels, and circumferential variations in interface dynamics along the side wall. The slag-iron interface exhibited linear descent followed by saturation, while the gas-slag interface underwent linear descent followed by acceleration. Bifurcation at the onset of slag drainage, occurring earlier with larger <span><math><mrow><msub><mi>D</mi><mi>P</mi></msub><mspace></mspace></mrow></math></span>and lower <span><math><msub><mi>μ</mi><mi>s</mi></msub></math></span>, marked a critical shift in dynamics. Before bifurcation, <span><math><mrow><msub><mi>D</mi><mi>P</mi></msub><mspace></mspace></mrow></math></span>governed interface descent; after bifurcation, <span><math><mrow><msub><mi>μ</mi><mi>s</mi></msub><mspace></mspace></mrow></math></span>dominated, lowering pressure and increasing the pressure gradient near the taphole. These findings include novel insights into localized dynamics, revealing sharper circumferential gradients under conditions of higher <span><math><mrow><msub><mi>μ</mi><mi>s</mi></msub><mspace></mspace></mrow></math></span>and smaller <span><math><msub><mi>D</mi><mi>P</mi></msub></math></span>. Despite variations, slag and iron layer thickness ratios remained stable, reflecting their independence from <span><math><mrow><msub><mi>μ</mi><mi>s</mi></msub><mspace></mspace></mrow></math></span>and <span><math><msub><mi>D</mi><mi>P</mi></msub></math></span>. Additionally, a critical intersection point in mass flow rates was identified, where slag flow surpassed iron flow. This point, delayed under conditions of higher <span><math><mrow><msub><mi>μ</mi><mi>s</mi></msub><mspace></mspace></mrow></math></span>and smaller <span><math><msub><mi>D</mi><mi>P</mi></msub></math></span>, highlighted the influence of reduced fluidity on two-phase outflow dynamics. These findings highlight the potential of optimizing <span><math><mrow><msub><mi>μ</mi><mi>s</mi></msub><mspace></mspace></mrow></math></span>and <span><math><mrow><msub><mi>D</mi><mi>P</mi></msub><mspace></mspace></mrow></math></span>to enhance fluidity, production, energy efficiency and sustainability in blast furnace operations.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127085"},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799733","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 novel vapor chamber with gradient capillary wick and larger expansion area 一种具有梯度毛细管芯和更大膨胀面积的新型蒸汽室
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-09 DOI: 10.1016/j.ijheatmasstransfer.2025.127021
Shichao Bu , Haoran Li , Xiaoping Yang , Yonghai Zhang , Kaiwen Duan , Hongwei Bai , Jinjia Wei
{"title":"A novel vapor chamber with gradient capillary wick and larger expansion area","authors":"Shichao Bu ,&nbsp;Haoran Li ,&nbsp;Xiaoping Yang ,&nbsp;Yonghai Zhang ,&nbsp;Kaiwen Duan ,&nbsp;Hongwei Bai ,&nbsp;Jinjia Wei","doi":"10.1016/j.ijheatmasstransfer.2025.127021","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127021","url":null,"abstract":"<div><div>As chip integration and performance increased, power consumption grew, making thermal management critical. While vapor chambers offered efficient heat transfer, uniform heat distribution, and simple structures, the capillary force of grooved and mesh designs were insufficient to meet higher cooling demands, highlighting the need for more efficient technologies. This study presents a longitudinally gradient sintered capillary copper-based vapor chamber to overcome the limitations of traditional grooved and mesh structures, enhancing liquid transport and accelerating the internal cycle for improved liquid supply to the evaporation zone. The working fluid employed in the experimental setup consisted of deionized water, making the design suitable for higher heat flux and power conditions. Thermal characterization of the vapor chamber was conducted through a liquid cooling plate, and the effects of different inclination angles and coolant temperatures on performance were systematically studied. Experimental results showed that inclination angle had little effect on performance, with thermal resistance increasing by only 0.007 K/W when operated vertically compared to horizontally. Additionally, raising the coolant temperature significantly improved heat transfer performance, reducing thermal resistance by 26.1 % at 40 °C compared to 20 °C. Furthermore, Experimental results demonstrated that the vapor chamber maintained stable functionality under power inputs reaching up to 1200 W. corresponding to a heat flux of 240 W/cm², at this time, the thermal resistance was 0.047K/W, indicating its potential for managing extremely high-power chips.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799534","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
Experimental investigation on the startup behavior and visualization of dual-evaporator loop heat pipes 双蒸发器回路热管启动行为及可视化实验研究
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-09 DOI: 10.1016/j.ijheatmasstransfer.2025.127053
Andhy M. Fathoni , Priska A. Hendrayanto , Ranggi S. Ramadhan , Nandy Putra
{"title":"Experimental investigation on the startup behavior and visualization of dual-evaporator loop heat pipes","authors":"Andhy M. Fathoni ,&nbsp;Priska A. Hendrayanto ,&nbsp;Ranggi S. Ramadhan ,&nbsp;Nandy Putra","doi":"10.1016/j.ijheatmasstransfer.2025.127053","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127053","url":null,"abstract":"<div><div>This study investigates the startup behavior and flow dynamics of a dual-evaporator loop heat pipe (DE-LHP) using neutron radiography. The DE-LHP is designed to overcome the challenges of efficiently managing multiple heat sources. Neutron radiography allows visualization of the liquid and vapor distributions, revealing phenomena like vapor backflow, liquid carryover, and heat leakage. Experiments were conducted with various heat load configurations, including balanced and unbalanced distributions, and different geometric orientations. The results show that at a balanced heat load (120 W total), the system reaches steady-state in 500 s with a thermal resistance of 0.14 °C/W while the highest thermal resistance of 0.64 °C/W was observed in the unequal heat load case of 56 W. The unbalanced heat load increases the thermal resistance and decreases the thermal efficiency due to uneven heat distribution and incomplete startup. Orientation studies show that the inclination of the DE-LHP reduces the liquid carryover and vapor backflow, improving the heat transfer efficiency. These findings provide valuable insights for optimizing the DE-LHP design and improving the thermal management system.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799181","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
Study on the friction resistance characteristics of supercritical CO2 correlating with heat transfer behavior in vertical tubes 垂直管内超临界CO2摩擦阻力特性与换热行为的关系研究
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-08 DOI: 10.1016/j.ijheatmasstransfer.2025.127057
Wenhua Wu , Chenshuai Yan , Xinyi Zhang , Xiaojuan Niu , Haisong Zhang
{"title":"Study on the friction resistance characteristics of supercritical CO2 correlating with heat transfer behavior in vertical tubes","authors":"Wenhua Wu ,&nbsp;Chenshuai Yan ,&nbsp;Xinyi Zhang ,&nbsp;Xiaojuan Niu ,&nbsp;Haisong Zhang","doi":"10.1016/j.ijheatmasstransfer.2025.127057","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127057","url":null,"abstract":"<div><div>The supercritical carbon dioxide (scCO<sub>2</sub>) Brayton cycle has attracted significant attention because of high cycle efficiency and compact layout. As one of the critical issues, the characteristic of scCO<sub>2</sub> flow resistance, which affects compression work and thermal efficiency, is essential to the design of the cycle components. Firstly, the heat transfer and pressure drop characteristics of scCO<sub>2</sub> flowing vertically upwards in the heated tubes are experimentally and numerically investigated. The experimental parameters span pressures of 7.5−16 MPa, mass fluxes of 500−1530 kg/m<sup>2</sup>s, and heat fluxes of 20−250 kW/m<sup>2</sup>. Then, the relationship between friction pressure drop and supercritical heat transfer behavior is numerically explored. We discover that both the friction pressure drop and friction factor are closely related to the supercritical heat transfer behavior. Exactly, supercritical heat transfer deterioration (HTD) can lead to a large friction pressure drop. We analyze the mechanism of heat transfer inducing friction pressure drop change according to the assumption of supercritical pseudo-phase change, where similar to the film boiling heat transfer at subcritical pressure, a vapor-like layer attaching to heating surface and core liquid-like phase. Owing to the large thermal resistance induced by the vapor-like layer when HTD occurs, the core liquid-like cannot be heated smoothly. That results in a high molecular viscosity level. Ulteriorly, the friction pressure drop rises. Considering the correlation between frictional pressure drop and scCO<sub>2</sub> heat transfer behavior, a newly modified Filonenko correlation is proposed to predict the friction factor of scCO<sub>2</sub>. In contrast to the experimental data, the <em>e</em><sub>ME</sub>, <em>e</em><sub>MAE</sub> and <em>e</em><sub>RMSE</sub> of the new correlation are 3.6%, 16.41%, and 19.88%, respectively, which shows the highest prediction accuracy compared with the friction factor correlations in previous literature.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127057"},"PeriodicalIF":5.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791076","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
Characterization of semi-open liquid desiccant cycle energy efficiency in ventilation air treatment 通风空气处理中半开式液体干燥剂循环能效的表征
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-08 DOI: 10.1016/j.ijheatmasstransfer.2025.127061
Rohit Bhagwat , Raju Bhatia , Michael Schmid , Sidharth Sanadhya , Ashwani Verma , Saeed Moghaddam
{"title":"Characterization of semi-open liquid desiccant cycle energy efficiency in ventilation air treatment","authors":"Rohit Bhagwat ,&nbsp;Raju Bhatia ,&nbsp;Michael Schmid ,&nbsp;Sidharth Sanadhya ,&nbsp;Ashwani Verma ,&nbsp;Saeed Moghaddam","doi":"10.1016/j.ijheatmasstransfer.2025.127061","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127061","url":null,"abstract":"<div><div>Efficient moisture removal from air without subcooling using liquid desiccants represents a major advancement in energy-efficient cooling, particularly through the separate sensible and latent cooling (SSLC) process. However, developing a high-performance, robust liquid desiccant dehumidification cycle remains challenging. Traditional open desiccant cycles rely on outdoor air to remove moisture from the desiccant solution in the regenerator, but this also extracts significant sensible heat, reducing overall efficiency. This study investigates a semi-open absorption cycle that eliminates the need for scavenging air, addressing a key inefficiency of conventional systems. An experimental system was tested under varying outdoor air conditions, demonstrating substantial performance improvements. The semi-open cycle significantly reduced sensible heat loss compared to traditional systems while maintaining strong moisture removal capabilities. Notably, it achieved a dehumidification coefficient of performance (COP) of up to 0.9, with peak latent cooling capacity observed at higher inlet air dew points. These findings underscore the semi-open cycle's potential for enhancing energy efficiency in dehumidification, particularly in regions with high latent loads.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127061"},"PeriodicalIF":5.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791075","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
Experimental studies of saturated pool boiling heat transfer and critical heat flux on scalable etched copper surfaces for R-134a and low-GWP refrigerants R-1336mzz(E) and R-1336mzz(Z) R-134a和低gwp制冷剂R-1336mzz(E)和R-1336mzz(Z)在可扩展蚀刻铜表面的饱和池沸腾传热及临界热流密度实验研究
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-07 DOI: 10.1016/j.ijheatmasstransfer.2025.126958
Yiyang Chen , Vishwanath Ganesan , Mohammad Jalal Inanlu , Haoyun Qiu , Bakhshish Preet Singh , Shuoning Shi , Wuchen Fu , Nenad Miljkovic
{"title":"Experimental studies of saturated pool boiling heat transfer and critical heat flux on scalable etched copper surfaces for R-134a and low-GWP refrigerants R-1336mzz(E) and R-1336mzz(Z)","authors":"Yiyang Chen ,&nbsp;Vishwanath Ganesan ,&nbsp;Mohammad Jalal Inanlu ,&nbsp;Haoyun Qiu ,&nbsp;Bakhshish Preet Singh ,&nbsp;Shuoning Shi ,&nbsp;Wuchen Fu ,&nbsp;Nenad Miljkovic","doi":"10.1016/j.ijheatmasstransfer.2025.126958","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126958","url":null,"abstract":"<div><div>Enhancing pool boiling heat transfer with low-Global Warming Potential (low-GWP) refrigerants is increasingly becoming an important topic in the heating, ventilation, air conditioning, and refrigeration (HVAC&amp;R) sector. This study develops two scalable etching techniques for copper (Cu) tubes, with surface structures having characteristic length scales of <span><math><msub><mi>R</mi><mtext>structure</mtext></msub></math></span> = 16 µm and 12 µm for FeCl<sub>3</sub> and H<sub>2</sub>O<sub>2</sub> etch chemistries, respectively. In saturated pool boiling experiments for refrigerants, the etched Cu tubes are shown to increase the heat transfer coefficient (HTC) by activating a wider range of cavities and enhancing active nucleation site density. When tested with low-GWP refrigerant R-1336mzz(E), the FeCl<sub>3</sub> and the H<sub>2</sub>O<sub>2</sub> Etched Cu tubes increased the HTC to 1.9X and 2.0X compared to plain Cu tubes, respectively. The HTC enhancements observed with both etched surfaces agree well with the newly developed modified Cooper correlation for structured surfaces with a mean absolute error (MAE) of 5.5 %. The critical heat flux (CHF) for both etched Cu tubes during low-GWP R-1336mzz(E) and R-1336mzz(Z) saturated pool boiling was also tested, showing lower CHFs when compared to plain Cu tube samples because of reduced wetting in the Cassie-Baxter state. The experiments also show that temperature fluctuations at the hot water outlet increase with higher average wall superheat as CHF is approached. When combined with optical imaging, the results clearly reveal the transition in the boiling regimes. This study provides insights into scalable fabrication methods using chemical processing for the creation of enhanced external structures for refrigerant pool boiling, and offers guidance for the design of submerged or flooded shell-and-tube heat exchangers.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 126958"},"PeriodicalIF":5.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785808","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}
引用次数: 0
Numerical investigation of radiative transfers interactions with material ablative response for hypersonic atmospheric entry 高超声速大气入口辐射传递与材料烧蚀响应相互作用的数值研究
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-05 DOI: 10.1016/j.ijheatmasstransfer.2025.126999
Vincent Le Maout , Sung Min Jo , Alessandro Munafò , Marco Panesi
{"title":"Numerical investigation of radiative transfers interactions with material ablative response for hypersonic atmospheric entry","authors":"Vincent Le Maout ,&nbsp;Sung Min Jo ,&nbsp;Alessandro Munafò ,&nbsp;Marco Panesi","doi":"10.1016/j.ijheatmasstransfer.2025.126999","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126999","url":null,"abstract":"<div><div>Radiative transfer interactions with material ablation are critical contributors to vehicle heating during high-altitude, high-velocity atmospheric entry. However, the inherent complexity of fully coupled multi-physics models often necessitates simplifying assumptions, which may overlook key phenomena that significantly affect heat loads, particularly radiative heating. Common approximations include neglecting the contribution of ablation products, applying simplified frozen wall boundary conditions, or treating radiative transfer in a loosely coupled manner. This study introduces a high-fidelity, tightly coupled multi-solver framework designed to accurately capture the multi-physics challenges of hypersonic flow around an ablative body. The proposed approach consistently accounts for the interactions between shock-heated gases, surface material response, and radiative transfer. Our results demonstrate that including radiative heating in the surface energy balance substantially influences the ablation rate. Ablation products are shown to absorb radiative heat flux in the vacuum-ultraviolet spectrum along the stagnation line, while strongly emitting in off-stagnation regions. These findings emphasize the necessity of a tightly coupled multiphysics framework to faithfully capture the complex, multidimensional interactions in hypersonic flow environments, which conventional, loosely coupled models fail to represent accurately.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 126999"},"PeriodicalIF":5.0,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776715","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
Advances in boiling and evaporative heat transfer science and applications 沸腾与蒸发传热科学及其应用进展
IF 5 2区 工程技术
International Journal of Heat and Mass Transfer Pub Date : 2025-04-05 DOI: 10.1016/j.ijheatmasstransfer.2025.127047
Hussam Jouhara , Anothony Robinson
{"title":"Advances in boiling and evaporative heat transfer science and applications","authors":"Hussam Jouhara ,&nbsp;Anothony Robinson","doi":"10.1016/j.ijheatmasstransfer.2025.127047","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127047","url":null,"abstract":"","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127047"},"PeriodicalIF":5.0,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859833","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信