International Journal of Thermophysics最新文献_第10页

Thermophysical Properties of TiO2-Based Mono and Hybrid Nanofluids: Impact of CuO, ZnO, and Al2O3 Additives on Thermal Conductivity and Viscosity 二氧化钛基单纳米流体和杂化纳米流体的热物理性质：CuO、ZnO和Al2O3添加剂对导热性和粘度的影响

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-11-06 DOI: 10.1007/s10765-025-03672-9

Askar Kassymov, Ainur Adylkanova, Anuar Bektemissov, Temirlan Umyrzhan, Kalamkas Astemessova, Gulzhan Turlybekova, Müslüm Arıcı

{"title":"Thermophysical Properties of TiO2-Based Mono and Hybrid Nanofluids: Impact of CuO, ZnO, and Al2O3 Additives on Thermal Conductivity and Viscosity","authors":"Askar Kassymov, Ainur Adylkanova, Anuar Bektemissov, Temirlan Umyrzhan, Kalamkas Astemessova, Gulzhan Turlybekova, Müslüm Arıcı","doi":"10.1007/s10765-025-03672-9","DOIUrl":"10.1007/s10765-025-03672-9","url":null,"abstract":"<div>This study investigates the thermophysical properties of mono and hybrid nanofluids based on TiO2 nanoparticles dispersed in bidistilled water (DDW), with the addition of CuO, ZnO, and Al2O3 at a total volume concentration of 4 %vol in a 1:1 ratio. Nanofluids were synthesized using a two-step method with ultrasonic dispersion and surfactant stabilization (SDBS, 1:0.1 ratio). Thermal conductivity was measured using the transient hot wire method, while kinematic viscosity was assessed across a temperature range of 293 K to 333 K. Results showed that all nanofluids exhibited improved thermal conductivity and higher viscosity compared to pure DDW. Among them, the TiO2–CuO/DDW hybrid demonstrated the best overall performance, with a thermal conductivity increase of up to 14 % and the lowest relative increase in viscosity. In contrast, TiO2–Al2O3/DDW showed the highest viscosity increase (up to 140 % at 293 K) and the lowest conductivity enhancement. Additionally, the experimental thermal conductivity data were compared with theoretical models, revealing that the Maxwell model consistently showed the closest agreement, with minimal deviations across all nanofluids (e.g., MAPE: 1.1 % for TiO2 and 1.2 % for TiO2–ZnO). In terms of viscosity modeling, the Maïga model provided the most accurate predictions in most cases, particularly for TiO2–CuO (MAPE: 4.3 %), while the Pak-Cho model significantly overestimated viscosity in hybrid nanofluids, with errors exceeding 100 %. These findings suggest that CuO and ZnO nanoparticles are more effective than Al2O3 in improving heat transfer while minimizing flow resistance, making it better suited for practical thermal applications.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145442843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Calorimetric Properties of Pure Lithium Investigated by High Temperature Drop Calorimetry 用高温降热法研究纯锂的量热性质

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-11-06 DOI: 10.1007/s10765-025-03675-6

Andrei R. Khairulin, Sergei V. Stankus

引用次数: 0

Thermophysical Characterization of Propyl Methanoate + C6–C10 1-Alkanols: Experimental and Modeling 甲烷酸丙酯+ C6-C10 - 1-烷醇的热物理表征：实验与模拟

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-11-06 DOI: 10.1007/s10765-025-03674-7

Mohammad Almasi, Razieh Sadat Neyband

{"title":"Thermophysical Characterization of Propyl Methanoate + C6–C10 1-Alkanols: Experimental and Modeling","authors":"Mohammad Almasi, Razieh Sadat Neyband","doi":"10.1007/s10765-025-03674-7","DOIUrl":"10.1007/s10765-025-03674-7","url":null,"abstract":"<div>The current research examines the thermophysical behavior of systems involving propyl methanoate (PM) and a homologous series of 1-alkanol from 1-hexanol to 1-decanol within the temperature interval 293.15–323.15 K. The primary objective was to elucidate the intermolecular forces and the extent of non-ideality in these systems. The results demonstrate that across all binary systems, the excess molar volume maintained positive values over the entire concentration range. Moreover, these positive deviations in volume become more pronounced with both increasing temperature and elongation of the alcohol’s carbon chain. A consistent negative trend in viscosity deviations was observed for every system, with the deviation magnitude rising as the carbon chain extended. To interpret the volumetric behavior more comprehensively, the PC-SAFT model was employed to model liquid densities. The calculated densities exhibited excellent agreement with the corresponding experimental values across the studied mixtures. Among all investigated mixtures, the propyl methanoate with 1-decanol pair showed the maximum density deviation of 0.81% between experiment and model. The close match between calculated and experimental data attests to the strength of the PC-SAFT formulation in modeling non-ideal interactions in binary mixtures.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145442841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Evaluation of Reference Equations of State for Density Prediction in Regasified LNG Mixtures Using High-Precision Experimental Data 用高精度实验数据评价再气化液化天然气混合物密度预测的参考状态方程

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-31 DOI: 10.1007/s10765-025-03669-4

Daniel Lozano-Martín, Dirk Tuma, César R. Chamorro

{"title":"Evaluation of Reference Equations of State for Density Prediction in Regasified LNG Mixtures Using High-Precision Experimental Data","authors":"Daniel Lozano-Martín, Dirk Tuma, César R. Chamorro","doi":"10.1007/s10765-025-03669-4","DOIUrl":"10.1007/s10765-025-03669-4","url":null,"abstract":"<div>This study evaluates the performance of three reference equations of state (EoS), AGA8-DC92, GERG-2008, and SGERG-88, in predicting the density of regasified liquefied natural gas (RLNG) mixtures. A synthetic nine-component RLNG mixture was gravimetrically prepared. High-precision density measurements were obtained using a single-sinker magnetic suspension densimeter over a temperature range of (250 to 350) K and pressures up to 20 MPa. The experimental data were compared with EoS predictions to evaluate their accuracy. AGA8-DC92 and GERG-2008 showed excellent agreement with the experimental data, with deviations within their stated uncertainty. In contrast, SGERG-88 exhibited significantly larger deviations for this RLNG mixture, particularly at low temperatures of (250 to 260) K, where discrepancies reached up to 3 %. Even at 300 K, deviations larger than 0.4 % were observed at high pressures, within the model’s uncertainty, but notably higher than those of the other two EoSs. The analysis was extended to three conventional 11-component natural gas mixtures (labeled G420 NG, G431 NG, and G432 NG), previously studied by our group using the same methodology. While SGERG-88 showed reduced accuracy for the RLNG mixture, it performed reasonably well for these three mixtures, despite two of them have a very similar composition to the RLNG. This discrepancy is attributed to the lower CO2 and N2 content typical in RLNG mixtures, demonstrating the sensitivity of EoS performance to minor differences in composition. These findings highlight the importance of selecting appropriate EoS models for accurate density prediction in RLNG applications.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03669-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145406285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A Simple Viscosity Model Based on an Expanded Fluid Correlation for Ionic Fluids 基于扩展流体关联的离子流体简单粘度模型

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-27 DOI: 10.1007/s10765-025-03663-w

Ricardo Macías-Salinas, Rafael A. Loza-García, Obed A. Solis-González

{"title":"A Simple Viscosity Model Based on an Expanded Fluid Correlation for Ionic Fluids","authors":"Ricardo Macías-Salinas, Rafael A. Loza-García, Obed A. Solis-González","doi":"10.1007/s10765-025-03663-w","DOIUrl":"10.1007/s10765-025-03663-w","url":null,"abstract":"<div>The present work introduces a modification to the expanded fluid-based viscosity correlation (originally proposed by Yarranton and Satyro in 2009 for hydrocarbons) in order to obtain improved representations of the dynamic viscosity of several representative modern ionic fluids: pure ionic liquids (ILs) and deep eutectic solvents (DESs). The strong non-linearity introduced by the two-nested exponential form in the original Yarranton–Satyro correlation has been presently simplified by expressing the argument of the outer exponential as a linear combination of inverse powers of the reduced temperature and a logarithmic term involving the compressed state density in a vacuum ρs0, the fluid density ρ, and the pressure. The resulting modified Yarranton–Satyro (MYS) correlation thus contains two key thermodynamic potentials (ρs0 and ρ) which in turn were estimated via the use of two simple cubic equations of state of the van der Waals type: Soave–Redlich–Kwong or Peng–Robinson. The present MYS approach was successfully verified during the correlation and prediction of experimental dynamic viscosities of 3 families of imidazolium-based ILs ([CXmim][BF4], [CXmim][PF6], and [CXmim][Tf2N]), one pyridinium-based IL ([b3mpy][BF4]), one pyrrolidinium-based IL ([P14][Tf2N]), one ammonium-based IL ([N1114][Tf2N]), and four ILs having non-fluorinated anions ([dmim][MeSO4], [bmim][EtSO4], [bmim][Ac], and [b3mpy][dca]) over a temperature range varying from 273.15 K to 438.15 K and at pressures from 1 to 3000 bar. We also considered three archetypal choline chloride-based DESs for model validation: Reline, Ethaline, and Glyceline within a temperature range varying from 293.15 K to 373.15 K and at pressures from 1 to 1000 bar.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145405586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Unveiling Size Effect in the Spatial Domain Thermoreflectance Measurement of Cross-Sectional Coating Samples 揭示截面涂层样品空间热反射测量中的尺寸效应

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-27 DOI: 10.1007/s10765-025-03670-x

Yaoyang Zhang, Yibo Zhang, Yuzhou Wang

{"title":"Unveiling Size Effect in the Spatial Domain Thermoreflectance Measurement of Cross-Sectional Coating Samples","authors":"Yaoyang Zhang, Yibo Zhang, Yuzhou Wang","doi":"10.1007/s10765-025-03670-x","DOIUrl":"10.1007/s10765-025-03670-x","url":null,"abstract":"<div>Thin coatings have emerged as a critical component of advanced nuclear fuels. Located in the path of heat dissipation, a thorough investigation of coating thermal conductivity is imperative. The spatial-domain thermoreflectance (SDTR) technique is ideally suited for characterizing their thermal conductivity due to its high spatial resolution. However, applying SDTR to cross-sectional samples is complicated by their asymmetric geometry and layered structure, which preclude analytical heat transfer solutions and introduce significant uncertainty in the data analysis. Here, we employ finite element modeling, validated by experiments, to quantify the size effects that govern SDTR measurements on cross-sectional coating samples. We determine the minimal coating dimensions required for accurate, artifact-free measurement and reveal how these dimensions are influenced by the thermal property mismatch between the coating, substrate, and transducer film. We further quantify the measurement error induced by off-center laser positioning. Through systematic investigation of progressively complex scenarios, analytical expressions for rapid determination of minimum dimensions free from boundary artifacts are derived. Our framework establishes practical guidelines for accurate thermal characterization of coatings by SDTR for energy materials research.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145405585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 and Experimental Study on Novel Nano-enhanced Binary Phase Change Material for Cold Chain Logistics 新型纳米增强冷链物流二元相变材料的表征与实验研究

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-27 DOI: 10.1007/s10765-025-03662-x

S. Joel Silas, V. Mariappan, M. Arun, K. Karthikeyan

{"title":"Characterization and Experimental Study on Novel Nano-enhanced Binary Phase Change Material for Cold Chain Logistics","authors":"S. Joel Silas, V. Mariappan, M. Arun, K. Karthikeyan","doi":"10.1007/s10765-025-03662-x","DOIUrl":"10.1007/s10765-025-03662-x","url":null,"abstract":"<div>Novel nano-enhanced phase change materials (NEPCMs) for vaccine storage applications have been developed for vaccine transportation. Phase change materials (PCMs) are highly regarded due to their excellent heat storage capacities and their ability to operate within a limited temperature range. Nonetheless, their low thermal conductivity restricts their applicability. A binary mixture of caprylic acid (CL) and capric acid (CA) with a weight fraction of 58:42 was developed for the passive cooling application. The CL–CA binary mixture exhibits a melting enthalpy (Hm) of 119.07 Jg−1 and a melting temperature (Tm) of 7.66 °C. Boron nitride (BN) was used as a thermal conductivity enhancer for the above binary mixture. BN was added in various weight percentages of 0.5 %, 1 %, 1.5 %, and 2 % in the binary mixture to develop NEPCMs. There was an improvement of 12.1 % in thermal conductivity for 2 % BN from the base binary mixture. Furthermore, thermal cycling has been done and the samples have maintained stability and phase change characteristics as confirmed using FTIR (Fourier transform infrared spectroscopy), thermal conductivity, and DSC (differential scanning calorimetry).</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145405618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Phase Behavior and Surface Tension for the Carbon Dioxide (CO2), Difluoromethane (R32), and 1,1,1,2-Tetrafluoroethane (R134a) Mixtures: A Molecular Dynamics Study 二氧化碳（CO2）、二氟甲烷（R32）和1,1,1,2-四氟乙烷（R134a）混合物的相行为和表面张力：分子动力学研究

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-22 DOI: 10.1007/s10765-025-03667-6

Tao Yang, Qingyu Yang, Junwei Cui, Jun Shen

{"title":"Phase Behavior and Surface Tension for the Carbon Dioxide (CO2), Difluoromethane (R32), and 1,1,1,2-Tetrafluoroethane (R134a) Mixtures: A Molecular Dynamics Study","authors":"Tao Yang, Qingyu Yang, Junwei Cui, Jun Shen","doi":"10.1007/s10765-025-03667-6","DOIUrl":"10.1007/s10765-025-03667-6","url":null,"abstract":"<div>Carbon dioxide (CO2), as a natural working fluid, is blended with hydrofluorocarbons (HFCs) or hydrofluoroolefins (HFOs) that exhibit favorable thermodynamic properties. By modifying the mixture composition, the performance of the refrigeration system can be optimized in terms of efficiency and operational conditions. However, comprehensively evaluating the thermodynamic properties of CO2-based mixtures through experimental measurements alone remains challenging due to the complexity, expense, and time involved. This highlights the critical necessity for advanced computational methods to enhance and extend experimental research. In this study, molecular dynamics (MD) simulations were employed to comprehensively investigate the vapor–liquid phase behaviors and surface tension properties of CO2, R32, and R134a in their pure, binary, and ternary components, respectively. The MD results show good agreement with our previous Gibbs Ensemble Monte Carlo (GEMC) simulations and the experiment-derived correlations from REFPROP program, demonstrating the precision and dependability of the employed force field and molecular methodology. These findings validate that molecular simulation, when coupled with a well-parameterized potential energy function, can effectively characterize essential thermophysical properties and fill data gaps where experimental measurements are limited. The methodology provides a solid foundation for subsequent research on refrigerant mixture behavior and offers valuable insights for the optimization and design of thermal cycle systems.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Viscosity Measurement by the “Oscillating Drop” Method: Limits of the Linear Model 用“振荡滴”法测量粘度：线性模型的局限性

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-18 DOI: 10.1007/s10765-025-03618-1

Georg Lohöfer

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Phase Equilibria of D2O Hydrates for Hydrate-Based Tritium Separation 水合物基氚分离中D2O水合物的相平衡

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-10-18 DOI: 10.1007/s10765-025-03666-7

Ryonosuke Kasai, Haruki Ito, Hitoshi Kiyokawa, Leo Kamiya, Saman Alavi, Ryo Ohmura

{"title":"Phase Equilibria of D2O Hydrates for Hydrate-Based Tritium Separation","authors":"Ryonosuke Kasai, Haruki Ito, Hitoshi Kiyokawa, Leo Kamiya, Saman Alavi, Ryo Ohmura","doi":"10.1007/s10765-025-03666-7","DOIUrl":"10.1007/s10765-025-03666-7","url":null,"abstract":"<div>Clathrate-hydrate-based tritium separation from isotope water is a promising process for removing tritium that is not effectively separated by conventional methods. Clathrate hydrates (hereafter hydrates) are crystalline compounds composed of water and guest molecules. Hydrate-based tritium separation utilizes the property that heavy water (D2O) forms hydrates under milder temperatures than light water (H2O). Efficient industrial operation requires a guest compound that forms hydrates at high temperatures and low pressures and has a large difference in phase equilibrium temperature between H2O and D2O hydrates (ΔTDH). In this study, we measured the phase equilibrium conditions of D2O hydrates formed with HFC-134a, HFC-32, and HFC-23. The formation of D2O hydrates with these guests can be a route to tritium separation through co-precipitation of T2O. HFC-134a formed hydrates under the mildest conditions, with ΔTDH values of 2.8 K, 1.8 K, and 2.4 K for HFC-134a, HFC-32, and HFC-23. In addition to the three investigated guests, the potentials of propane, cyclopentane, and cyclopentane + CO₂ hydrate systems for hydrogen isotope separations were also compared, suggesting that HFC-134a and cyclopentane may be suitable guests for tritium separation. Present and previous studies have also shown a strong positive correlation between the hydration number and ΔTDH (correlation coefficient = 0.76). This trend may be ascribed to the fact that a higher proportion of water molecules in the hydrate amplifies the effect of replacing H2O with D2O. These results indicate that the equilibrium conditions of D₂O hydrates may be approximately predicted to identify suitable guests for tritium separation.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 12","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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