Journal of Thermal Analysis and Calorimetry最新文献

{"title":"Numerical investigation on hydrothermal characteristics of Turbulator-Integrated triple-tube heat exchanger with ternary hybrid nanofluid","authors":"Akash B. Raut,&nbsp;Rahul Tarodiya,&nbsp;Vilas R. Kalamkar,&nbsp;Ranjeet Rai,&nbsp;Vikas Verma","doi":"10.1007/s10973-026-15449-9","DOIUrl":"10.1007/s10973-026-15449-9","url":null,"abstract":"<div><p>In this study, the thermal performance of a triple-tube heat exchanger integrated with a turbulator is investigated through computational fluid dynamics (CFD) simulations. Fluids are flowing in a counterflow pattern through the three concentric pipes, with a turbulator placed in the innermost pipe. A ternary hybrid nanofluid (THNF) is employed as the cold fluid, and water is used as the hot and normal fluids to operate the triple-tube heat exchanger. The effects of the number of turbulator turns (5, 10, 15, and 30) and the concentration of ternary hybrid nanofluid (THNF) (0.12% and 0.06%) on the effectiveness and pressure drop are systematically investigated and compared with and without the turbulator. The results indicate that increasing the number of turbulator turns enhances the effectiveness, accompanied by a corresponding rise in pressure drop. The improvements in effectiveness are 457% (30 turns), 271% (15 turns), and 164% (10 turns) relative to the plain tube configuration. An increase in the concentration of nanoparticles increases the effectiveness and pressure drop. The increase in effectiveness of 5% and 3.5% is determined with 0.12% and 0.06% THNF relative to water.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6387 - 6396"},"PeriodicalIF":3.1,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of biomass-extracted natural fiber and copper oxide/nickel oxide nanoparticle-reinforced vinyl ester composite and its characterization study","authors":"S. Manoj Kumar,&nbsp;Dhandapany sendil Kumar,&nbsp;M. Arul Murugan,&nbsp;Yousef A. Baker El-Ebiary,&nbsp;B. Sachuthananthan,&nbsp;N. Nagabhooshanam,&nbsp;Adduri S S M Sita Rama Murthy,&nbsp;PritamKumar Das","doi":"10.1007/s10973-025-15037-3","DOIUrl":"10.1007/s10973-025-15037-3","url":null,"abstract":"<div><p>This research investigates the mechanical, wear, thermal, and degradation properties of vinyl ester resin composites reinforced with 40 vol.% silane-treated <i>Miscanthus</i> fiber and varying concentrations of CuO (copper oxide) and NiO (nickel oxide). Specimen PMC2 (2 vol.% CuO) exhibited the highest mechanical strength, with a tensile strength of 141 MPa, flexural strength of 157 MPa, impact strength of 4.2 J, and hardness of 82 Shore-D, due to improved interfacial bonding and stress distribution. Specimen PMC3 (4 vol.% CuO) demonstrated the best wear resistance and lowest thermal conductivity, with a wear rate of 0.018 mm³ Nm^–1 and thermal conductivity of 0.24 W m^–1 K^–1, confirming its suitability for tribological and thermal insulation applications. Specimen PMN3 (4 vol.% NiO) exhibited the highest thermal stability, with a TG% of 97% at 431 °C and the lowest DTG% of 5.5% at 421 °C, due to the ceramic nature of NiO. SEM analysis confirmed smoother wear surfaces in PMC3 and minimal micro-cracks in PMN3, validating their superior performance. These findings suggest that CuO enhances mechanical, wear, and thermal properties, while NiO significantly improves thermal stability, making these composites suitable for automotive, aerospace, and thermal insulation applications.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5571 - 5583"},"PeriodicalIF":3.1,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of heat transmission for a magnetic fluid flow in a minichannel with corrugated walls and variable cross-section associated with a magnetic field","authors":"Imene Rahmoune,&nbsp;Saadi Bougoul,&nbsp;Samra Zeroual","doi":"10.1007/s10973-026-15431-5","DOIUrl":"10.1007/s10973-026-15431-5","url":null,"abstract":"<div><p>This research focuses on the numerical analysis of an active vortex generator designed to improve heat transmission of a magnetic nanofluid under the impact of an external magnetic field. The magnetic nanofluid used Fe₃O₄, with volume fractions of 0.5% and 1%, flows through a two-dimensional corrugated minichannel with a variable cross-section. Various simulations were accomplished for Reynolds numbers extending from 170 to 210 and magnetic field strengths from 0 to 1400 G. Two configurations were considered: one with a single source positioned at 15 mm and the other with two sources positioned at 7.5 mm and 15 mm from the inlet, respectively. The results demonstrate that the external magnetic field acts as a vortex generator, modifying the velocity distribution, improving fluid mixing and consequently intensifying convective heat transfer. The presence of permanent magnets significantly reduces the coefficient of friction by deflecting the ferrofluid toward the upper surface using an upward magnetic force. In the optimal situation, the Nusselt number can be intensified by a value of 44.45% and the pressure can decrease by 5.11%. For this investigation, thermal enhancement factor (TEF) exceeds one, meaning that results are promising. This highlights the crucial role of the magnetic field in enhancing heat transmission from a magnetic nanofluid flowing in a minichannel. These results have important implications, particularly for the study of blood flow in stenosed arteries by introducing nanoparticles.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6371 - 6386"},"PeriodicalIF":3.1,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigation of heat transfer in Williamson nanofluid flow with the Cattaneo–Christov double diffusion model using an artificial neural network approach","authors":"M. Waqas Ashraf,&nbsp;Zhoushun Zheng,&nbsp;Khurram Shabbir,&nbsp;M. Israr Ur Rehman","doi":"10.1007/s10973-026-15365-y","DOIUrl":"10.1007/s10973-026-15365-y","url":null,"abstract":"<div><p>The Cattaneo<b>–</b>Christov double diffusion model generalizes classical diffusion theory by incorporating relaxation time effects enabling the characterization of heat and mass transport with finite propagation speeds. This advancement allows the model to effectively describes electrically induced magnetohydrodynamic (EMHD) flow and radiative heat transfer over a stretched surface for improved heat and mass transfer in Williamson nanofluids. In investigating these phenomena, the nonlinear partial differential equations are reduced to ordinary differential equations by employing a similarity transformation and solving them with the BP4C method. In addition, an artificial neural network trained with the Levenberg<b>–</b>Marquardt backpropagation algorithm is utilized to forecast flow regimes and heat transfer. For training, the dataset was divided into 70% training, 15% validation, and 15% test sets. Performance was assessed in terms of mean square error and regression analysis. Results from the ANN and computational approaches agree well with the earlier works. Notably, (LM-BP) provides an accurate analysis with a validation error of approximately 1.2%. It is also concluded that velocity decreases with a higher Weissenberg number <span>(left(text{We}right))</span> but increases with electric MHD strength. In contrast, the thermal <span>(left({lambda }_{text{t}}right))</span> and solute <span>(left({lambda }_{text{c}}right))</span> relaxation parameters are negatively correlated with temperature and concentration, respectively.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6185 - 6200"},"PeriodicalIF":3.1,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancements in photovoltaic thermal cooling systems: analysis of nanofluid technologies","authors":"A. Aziz,&nbsp;W. Sultan,&nbsp;H. Shabbir,&nbsp;M. Shams,&nbsp;T. Aziz,&nbsp;M. Asif","doi":"10.1007/s10973-026-15430-6","DOIUrl":"10.1007/s10973-026-15430-6","url":null,"abstract":"<div><p>Photovoltaic thermal (PVT) systems have emerged as a crucial technology for enhancing solar energy utilization by simultaneously generating electrical and thermal energy, thereby improving overall system efficiency. In recent years, fluid- and nanofluid-based cooling strategies have attracted significant research attention as effective means to mitigate temperature-induced efficiency losses in PVT modules. This study presents a comprehensive bibliometric and thematic analysis of global research on PVT cooling systems, with particular emphasis on fluid and nanofluid technologies. Using Scopus-indexed publications published between 2015 and 2025, bibliometric mapping and science visualization techniques are employed through VOSviewer to examine publication trends, influential authors, leading journals, collaborative networks, and keyword co-occurrence structures. The analysis reveals a rapid growth in research output over the last decade, with dominant contributions from Asia and increasing international collaboration. Key thematic clusters are identified, highlighting the evolution of nanofluid-assisted cooling, system performance optimization, hybrid cooling configurations, and computational modeling approaches. This study integrates bibliometric mapping with thematic analysis to elucidate how nanofluid-based PVT cooling strategies have evolved, exposing limitations, thermohydraulic trade-offs, and system-level challenges that constrain practical deployment. The findings provide a structured perspective on current research directions and knowledge gaps, offering valuable guidance for researchers, designers, and policymakers toward the development of efficient and scalable PVT cooling solutions.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6343 - 6369"},"PeriodicalIF":3.1,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of beeswax-based phase change materials modified with pine cone powder and graphite for thermal storage applications","authors":"Amira Akrouti,&nbsp;Abdelwaheb Trigui,&nbsp;Rym Hassani,&nbsp;Makki Abdelmouleh","doi":"10.1007/s10973-026-15420-8","DOIUrl":"10.1007/s10973-026-15420-8","url":null,"abstract":"<div><p>A novel beeswax-based phase change material (BWPCM) was developed using pine cone powder (PC) as a natural and sustainable supporting matrix. White beeswax (BW) served as the PCM, and graphite was added to enhance thermal conductivity. The composite was prepared through a low-cost mechanical milling process for thermal energy storage. BW is an organic phase change material that is widely available and has a much lower unit cost than conventional phase change materials (PCMs). The resulting BWPCMs exhibited enhanced performance relative to pure BW. FTIR analysis confirmed the chemical compatibility of the BWPCMs, showing no reactions between the components. Thermogravimetric analysis showed that the composites, particularly those with graphite (<i>G</i>), had improved thermal stability within their operating temperature range. Differential scanning calorimetry showed that BWPCM6, which containing 90% BW, 5% PC, and 5% <i>G</i> by mass, highlighted a high enthalpy of 157.75 J g^-1 and a suitable melting temperature (<i>T</i>_p,m = 52.01 °C), with enhanced thermal stability and energy density. These results indicate that the developed BWPCMs are well-suited for medium- to high-temperature thermal energy storage, combining an eco-friendly composition with strong thermal performance.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6285 - 6302"},"PeriodicalIF":3.1,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 systematic approach for enhancing the overall efficiency of solar chimney power plants","authors":"Emadoddin Erfani Farsi Eidgah,&nbsp;Abolfazl Sabzi,&nbsp;A. Ali-Wadi,&nbsp;Amirhossein Joveini,&nbsp;Mohammad Derayatifar,&nbsp;Hossein Ajam,&nbsp;Ali Kianifar","doi":"10.1007/s10973-026-15353-2","DOIUrl":"10.1007/s10973-026-15353-2","url":null,"abstract":"<div><p>The Solar chimney power plant is a reassuring technology for sustainable electricity generation. The aim of this research is to improve SCPP performance through geometric optimization by the use of artificial neural network (ANN) modeling to generate accurate predictions. The validated numerical model helped researchers study how collector inlet height together with collector angle and chimney diameter affect flow characteristics (velocity and pressure and temperature) and system performance. The research shows that treating each parameter separately leads to better efficiency and higher power output results. The research used an ANN model to determine the most efficient geometric design. The research found the best design with a collector inlet height of 0.6 m and a chimney diameter of 30 m and a collector angle of 2°. The optimized configuration under 800 Wm⁻² solar radiation improved energy production by 50% compared to the Manzanares prototype at different pressure drops according to validation simulations. The research findings resulted in practical knowledge which supported the large-scale SCPP deployment and proved that machine learning integration with thermodynamic modeling is an effective and practical solution for renewable energy system optimization.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5785 - 5805"},"PeriodicalIF":3.1,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An experimental study on heat transfer and pressure drop in a narrow rectangular channel having staggered miniature pin–fins with tip clearance","authors":"Zafer Gemici,&nbsp;Safak Urkmez,&nbsp;Mete Budakli","doi":"10.1007/s10973-026-15388-5","DOIUrl":"10.1007/s10973-026-15388-5","url":null,"abstract":"<div><p>This study focuses on the experimental examination of single-phase forced convection heat transfer and pressure drop during internal flow in a sandwich-like, shallow, rectangular copper channel under top-only, bottom-only and both-side heated conditions. Miniature pin–fin arrays of different shapes were formed on the bottom of the channel. Two different staggered miniature pin–fin geometries, rectangular-shape and knife-edged, were used on interchangeable bottom plates with the fin orientation parallel to the flow direction of the working fluid. The tip clearance of the fins to the opposite surface was precisely adjusted to 100 µm. The working fluid, water, entered the channel as fully developed flow; this was achieved by maintaining a previously calculated length required to obtain fully developed flow for maximum Reynolds numbers in the experiments. Measurements were carried out at varying inlet temperatures (10, 20 and 30 °C) and Reynolds numbers (4000, 6000, 8000, 10,000, 12,000, 14,000 and 16,000), while the results were compared to a non-finned surface. The measured results show that higher heat transfer coefficients can be obtained for both the finned surfaces under comparable operating conditions. At 20 °C, with a Reynolds number of 16,000, the Nusselt number is about 110 in the non-finned channel, about 175 in the knife-edge finned channel, and about 300 in the rectangular finned channel, but the use of miniature pin fins results in a higher pressure drop through the channel. The rectangular fin exhibits higher Nusselt number and higher pressure losses at all instances. The rectangular fin type has higher FOM (Figure of Merit) values despite greater pressure drops compared to the knife-edge fin type, due to enhanced heat transfer. The FOM value for the rectangular fin at a Reynolds number of 4000 is 1.74 with a water inlet temperature of 20 °C, whereas at a Reynolds number of 16,000, this value decreases to 1.28. That of the knife edge fin reduced from 1.4 to 0.91. The performance of the rectangular fin type is better in all heating modes and Prandtl numbers. The findings of this study offer a significant contribution to the design of state-of-the-art thermal management systems. Specifically, the demonstrated superiority of rectangular pin-fins with tip clearance provides a viable pathway for optimizing liquid cooling plates in high-power density applications, such as electric vehicle battery packs.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5703 - 5721"},"PeriodicalIF":3.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-026-15388-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Thermal characteristics of a tubular energy storage system with a central passage","authors":"Pratyush Anand Burnwal,&nbsp;Pankaj Singh Manral,&nbsp;Ravi Kumar,&nbsp;Anil Kumar Patil,&nbsp;Manoj Kumar","doi":"10.1007/s10973-026-15415-5","DOIUrl":"10.1007/s10973-026-15415-5","url":null,"abstract":"<div><p>The sensible energy storage system offers a reliable solution to store excess thermal energy for a wide range of thermal applications. The thermal performance of the storage system largely depends on the temperature distribution in the storage matrix during the charging/discharging process. The present study experimentally investigates the concrete-based tubular storage system with a centrally located passage under varying heat transfer fluid (HTF) inlet temperature from 45 to 85 °C at a mass flow rate of 0.018 kg s⁻¹. The temperature–time history along radial and axial directions is discussed to understand the thermal behaviour of different regions in the storage system.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 5","pages":"3941 - 3948"},"PeriodicalIF":3.1,"publicationDate":"2026-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"18th International Congress on Thermal Analysis and Calorimetry (ICTAC 2024)","authors":"Ranjit K. Verma","doi":"10.1007/s10973-026-15405-7","DOIUrl":"10.1007/s10973-026-15405-7","url":null,"abstract":"","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 5","pages":"3783 - 3786"},"PeriodicalIF":3.1,"publicationDate":"2026-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}