International Journal of Thermophysics最新文献_第9页

Exploration of the Molecular Interactions Between Polyhydroxy Acid: Gluconolactone and Glycols: A Thermoacoustic and Spectroscopic Method 探索多羟基酸：葡萄糖内酯和乙二醇之间的分子相互作用：热声和光谱方法

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-30 DOI: 10.1007/s10765-025-03580-y

Kanika Bhakri, K. C. Juglan, Nabaparna Chakraborty, Harsimran Kaur

{"title":"Exploration of the Molecular Interactions Between Polyhydroxy Acid: Gluconolactone and Glycols: A Thermoacoustic and Spectroscopic Method","authors":"Kanika Bhakri, K. C. Juglan, Nabaparna Chakraborty, Harsimran Kaur","doi":"10.1007/s10765-025-03580-y","DOIUrl":"10.1007/s10765-025-03580-y","url":null,"abstract":"<div><p>An important part of contemporary nutritional science, both in academia and industry, is understanding how polyhydroxyacids behave in water. With the help of thermo-physical qualities, this work presents a promising chance to expand our understanding of interactions. So, the experiments were conducted using the Anton Paar Density Speed Analyzer 5000 M at a constant experimental pressure of 0.1 MPa and a frequency of 3 MHz to determine the density and sound speed values for the ternary mixes of one of the Polyhydroxy acid: Gluconolactone and Polyethylene glycol-400/4000 at different doses of Gluconolactone (0.08, 0.09, and 0.10) <span>({molbullet kg}^{-1})</span>. The experimental data was used to calculate various thermo-physical parameters, such as apparent and limiting apparent molar volumes (<span>({V}_{phi })</span> and <span>({V}_{phi }^{0})</span>), apparent and limiting apparent molar isentropic compressions (<span>({K}_{phi ,s})</span> and <span>({K}_{phi ,s }^{0})</span>), and their transfer properties (<span>(Delta {V}_{phi }^{0})</span> and <span>(Delta {K}_{phi ,s }^{0})</span>). Triple (ABB) and paired (AB) interactions were computed from the computed coefficients using McMillan–Mayer theory. Parameter calculations indicate that in the case of this ternary mix, solute–solvent synergy is present and predominates, with hydrophilic interactions taking precedence over hydrophobic ones. It has also been tested whether these salts can form or break structures using Hepler’s criterion. Moreover, additional valuable parameters like expansibilities <span>({E}_{phi }^{0})</span> and their derivatives <span>((partial {E}_{phi }^{0}/partial T{)}_{p})</span> were observed as well.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170952","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 of CO2 + 2,2-dimethylbutane and CO2 + 2-methylpentane from 293 K to 363 K and at Pressures up to 11 MPa CO2 + 2,2-二甲基丁烷和CO2 + 2-甲基戊烷的相行为，从293 K到363 K，压力高达11 MPa

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-29 DOI: 10.1007/s10765-025-03579-5

Jean-Patrick Bazile, Jean-Luc Daridon, Jean-Noël Jaubert, Khaled Abou-Alfa, Stéphane Vitu

{"title":"Phase Behavior of CO2 + 2,2-dimethylbutane and CO2 + 2-methylpentane from 293 K to 363 K and at Pressures up to 11 MPa","authors":"Jean-Patrick Bazile, Jean-Luc Daridon, Jean-Noël Jaubert, Khaled Abou-Alfa, Stéphane Vitu","doi":"10.1007/s10765-025-03579-5","DOIUrl":"10.1007/s10765-025-03579-5","url":null,"abstract":"<div><p>This study is a continuation of a series of works concerning the acquisition of new experimental data related to binary mixtures of branched alkanes with CO<sub>2</sub>. A synthetic method was employed to measure phase transition pressures for the systems CO<sub>2</sub> + 2,2-dimethylbutane and CO<sub>2</sub> + 2-methylpentane with an adjustable-volume high-pressure cell. To our knowledge, these binary systems were investigated for the first time in this work. Bubble and dew point pressures were obtained by visual detection at constant composition with an expanded uncertainty ranging from (0.04 to 0.08) MPa. Mixtures were investigated at temperatures ranging from (293.15 to 363.15) K with pressures up to 11 MPa. The Peng-Robinson equation of state was used to correlate the experimental data. An accurate representation of the results has been obtained by using classical mixing rules with temperature-dependent binary interaction parameters regressed against experimental data. The predictive model PPR78 has also provided satisfactory results.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03579-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170899","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}

引用次数: 0

Experimental Analysis of Emissivity in Inconel 718 for Directed Energy Deposition Temperature Monitoring with Thermal Imaging 热成像定向能沉积温度监测用Inconel 718的发射率实验分析

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-29 DOI: 10.1007/s10765-025-03577-7

Jon Gabirondo-López, Telmo Echániz, Iñaki López-Ferreño, Jon Lambarri, Gabriel Alejandro López

{"title":"Experimental Analysis of Emissivity in Inconel 718 for Directed Energy Deposition Temperature Monitoring with Thermal Imaging","authors":"Jon Gabirondo-López, Telmo Echániz, Iñaki López-Ferreño, Jon Lambarri, Gabriel Alejandro López","doi":"10.1007/s10765-025-03577-7","DOIUrl":"10.1007/s10765-025-03577-7","url":null,"abstract":"<div><p>This contribution investigates the emissivity of Inconel 718 in the context of laser-based Directed Energy Deposition (DED), focusing on the impact of surface finish variations resultant from additive manufacturing techniques and the challenges it poses when monitoring the process via thermal imaging. We perform directional spectral measurements from 100 <span>(^{circ })</span>C to 900 <span>(^{circ })</span>C in high vacuum using a custom-made emissometer and analyze the differences between samples synthesized via casting and laser metal deposition. The data are also treated to obtain total hemispherical emissivity values and to compare them to literature data. Finally, as emissivity is the only input data that can be modified in thermographic cameras to calculate the temperature, we perform a temperature calculation error analysis to clarify the conditions and the emissivity input data under which the infrared cameras should operate in these additive manufacturing processes to make the temperature measurement more reliable.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03577-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170903","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}

引用次数: 0

Branching Fin Influence on Phase Transition and Hybrid Nanofluid Forced Convection in A Double Vented Heat Exchanger Unit Equipped with Encapsulated PCM and Field Reconstruction by Using POD 分支翅片对封装PCM双排气换热装置相变和混合纳米流体强制对流的影响及POD现场重构

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-29 DOI: 10.1007/s10765-025-03575-9

Fatih Selimefendigil, Hakan F. Öztop

{"title":"Branching Fin Influence on Phase Transition and Hybrid Nanofluid Forced Convection in A Double Vented Heat Exchanger Unit Equipped with Encapsulated PCM and Field Reconstruction by Using POD","authors":"Fatih Selimefendigil, Hakan F. Öztop","doi":"10.1007/s10765-025-03575-9","DOIUrl":"10.1007/s10765-025-03575-9","url":null,"abstract":"<div><p>Methods are needed to improve the effusiveness of using encapsulated phase change materials (PCMs) in thermo-fluid systems. In this study, effects of using branching fin on melt fraction of encapsulated PCM in a double vented cavity system which are separated by a thin partition is numerically explored during forced convection of ternary nanofluid. The study is carried out for different values of the Reynolds number (Re, between 200 and 1000), opening ratio (OR between 0.5 and 1.5), branching fin length (between 0.01<i>H</i> and 0.15<i>H</i>), and fin position (<span>(s_{f})</span> between 0.15<i>H</i> and 0.3<i>H</i>) by using finite element method. The presence of the branching fin induces vortices near the fin while both thermal performance and melt dynamics are influenced. The increment and decrement amounts of the entire transition time (TR) from Re = 200 to Re = 600 and from Re = 600 to Re = 1000 are 30 % and 17 %, respectively. Improvements in thermal performance at the maximum Re of the left and right cavities are 35.3 % and 58.6 %, respectively. For maximum heat transfer, the optimum OR value is 1, while for minimal TR, it is 1.75. Reduction in the TR up to 30 % and thermal performance improvement up to 39 % can be achieved by varying branching fin length. The average Nu variations with fin placements and the complete transition time are determined to be 20 % and 49 %, respectively. Utilizing branching fins at the lowest Re case decreases TR by 21.9 %, however it is lowered to 41.5 % at Re = 1000 when the reference scenario without branching fin at Re = 200 is taken into account. Time-dependent spatial variation of liquids fraction in the triangular zone is reconstructed for different Re values by using proper orthogonal decomposition.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03575-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170906","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}

引用次数: 0

Nanostructuring for Enhanced Thermal Conductivity at High Temperatures in an Inconel 600 Alloy 纳米结构在高温下增强Inconel 600合金的导热性

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-29 DOI: 10.1007/s10765-025-03574-w

Douglas A. Barlow

{"title":"Nanostructuring for Enhanced Thermal Conductivity at High Temperatures in an Inconel 600 Alloy","authors":"Douglas A. Barlow","doi":"10.1007/s10765-025-03574-w","DOIUrl":"10.1007/s10765-025-03574-w","url":null,"abstract":"<div><p>We report here on the results of first principles calculations on the thermal and mechanical properties of an Inconel 600 like alloy of the composition Ni<span>(_{18})</span>Cr<span>(_{4})</span>Fe<span>(_{2})</span>. Alloys of this type have important high temperature applications and of interest are their mechanical and thermal properties within a temperature range of 500 K to 1000 K. A specific concern of this study was the thermal conductivity. We sought out what atomic level arrangements might lead to enhancements in the thermal conductivity of this material. Our results suggest that the thermal conductivity for this alloy can be enhanced by the presence of three-atom wide Ni nano-layers. Thermal conductivity values for this configuration, and 19 others, are predicted and the method for arriving at these estimates is described. Calculations of elastic moduli for the configuration of highest thermal conductivity were made. These results predict that this alloy will possess sufficient mechanical stability for use in high temperature applications, such as in liquid salt heat exchangers, where improvements in the thermal conductivity of the alloy are essential.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170905","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

Predictive PC-SAFT Approach for Density and Experimental Study of Properties in Tetrahydrofurfuryl Alcohol + 1-Alkanol (1-Propanol to 1-Heptanol) Mixtures 预测PC-SAFT方法在四氢糠醇+ 1-烷醇（1-丙醇到1-庚醇）混合物中的密度和性质的实验研究

IF 2.9 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-29 DOI: 10.1007/s10765-025-03576-8

Mohammad Almasi, Ariel Hernández

引用次数: 0

Low Thermal Conductivity Plaster – Perlite Microsphere Composites as Potential Thermal Insulation Materials in Building Construction 低导热灰泥-珍珠岩微球复合材料作为潜在的建筑隔热材料

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-23 DOI: 10.1007/s10765-025-03572-y

Z. Viskadourakis, P. M. Angelopoulos, M. Orfanou, Α. Drymiskianaki, A. Manousaki, E. Koudoumas, M. Taxiarchou, G. Kenanakis

{"title":"Low Thermal Conductivity Plaster – Perlite Microsphere Composites as Potential Thermal Insulation Materials in Building Construction","authors":"Z. Viskadourakis, P. M. Angelopoulos, M. Orfanou, Α. Drymiskianaki, A. Manousaki, E. Koudoumas, M. Taxiarchou, G. Kenanakis","doi":"10.1007/s10765-025-03572-y","DOIUrl":"10.1007/s10765-025-03572-y","url":null,"abstract":"<div><p>In the current study plaster − expanded perlite microsphere composites, were investigated regarding their thermal insulation properties. In this context commercially available plaster powder was mixed with expanded perlite microspheres, of various grain size distribution and bulk density, aiming the investigation of the effect of ultrafines in the aggregates on the mechanical properties of the composites. The mixing procedure resembles that of making plaster mortars, in building construction. Thermal conductivity of composites was found to be sizably lower than that of pure plaster, and was further decreased with increasing filler loading. Moreover, filler density seems to affect thermal insulation performance, at high loading concentrations. Slight increase of the mechanical properties was identified when aggregates include ultrafine particles. Thermal insulation performance experiments indicate that plaster − expanded perlite microsphere composites clearly exhibit better thermal insulation properties, in comparison to pure plaster. Overall, expanded plaster − expanded perlite microsphere composites seem to be efficient insulation materials for potential applications in buildings’ construction, toward reducing their energy footprint.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03572-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117744","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}

引用次数: 0

Lithium-Ion Battery Modeling for Nonisothermal Conditions 非等温条件下的锂离子电池建模

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-23 DOI: 10.1007/s10765-025-03551-3

Felix Schloms, Øystein Gullbrekken, Signe Kjelstrup

{"title":"Lithium-Ion Battery Modeling for Nonisothermal Conditions","authors":"Felix Schloms, Øystein Gullbrekken, Signe Kjelstrup","doi":"10.1007/s10765-025-03551-3","DOIUrl":"10.1007/s10765-025-03551-3","url":null,"abstract":"<p>A nonequilibrium thermodynamic model is presented for the nonisothermal lithium-ion battery cell. Coupling coefficients, all significant for transport of heat, mass, charge and chemical reaction, were used to model profiles of temperature, concentration, and electric potential for each layer of the cell. Electrode surfaces were modeled with excess properties. Extending earlier works, we included lithium diffusion in the electrodes, and explained the cell’s thermal signature due to Peltier and Soret effects. We showed that the model is consistent with the second law of thermodynamics, meaning that the entropy production computed at steady state from entropy fluxes is equal to the integral over the sum of flux–force products. The procedure is beneficial in electrochemical cell modeling as it reveals inconsistencies. The model was solved for typical lithium-ion battery materials. The coupling coefficients for transport of salts and solvents lead to significant concentration polarization. Thermal polarization is then negligible. We show that a zero-valued heat flux is not necessarily synonymous with a zero temperature gradient. Results are important for efforts that aim to avoid local hot spots. A program code is made available for testing and applications. The program is designed to solve dynamic boundary value problems posed by the electrode surfaces.</p>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03551-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117743","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}

引用次数: 0

Sublimation Pressure and Heat Capacity of Dimethylsilanediol 二甲基硅二醇的升华压力和热容

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-21 DOI: 10.1007/s10765-025-03570-0

Michal Fulem, Vojtěch Štejfa, Květoslav Růžička, Michael Molnar

引用次数: 0

Thermophysical Properties of Binary and Ternary Mixtures Comprising Methyl Acetate, n-Hexane, and Cyclohexane: Experimental and Modeling Approach 由乙酸甲酯、正己烷和环己烷组成的二元和三元混合物的热物理性质：实验和建模方法

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-05-21 DOI: 10.1007/s10765-025-03573-x

Rozafa Krasniqi, Fisnik Aliaj, Naim Syla, Arbër Musliu, Arbër Zeqiraj

{"title":"Thermophysical Properties of Binary and Ternary Mixtures Comprising Methyl Acetate, n-Hexane, and Cyclohexane: Experimental and Modeling Approach","authors":"Rozafa Krasniqi, Fisnik Aliaj, Naim Syla, Arbër Musliu, Arbër Zeqiraj","doi":"10.1007/s10765-025-03573-x","DOIUrl":"10.1007/s10765-025-03573-x","url":null,"abstract":"<div><p>Experimental densities and sound speeds measured at temperatures (288.15, 298.15, 308.15, and 318.15) K under ambient pressure conditions are reported for the first time for the ternary system (methyl acetate + <i>n</i>-hexane + cyclohexane) covering the entire composition range. The corresponding binary subsystems (methyl acetate + <i>n</i>-hexane), (methyl acetate + cyclohexane), and (<i>n</i>-hexane + cyclohexane) have also been studied. The excess molar volumes and excess isentropic compressibilities were calculated from experimental data and correlated using Redlich-Kister and Cibulka equations for binary and ternary systems, respectively. The composition and temperature dependence of these properties provided insights into the nature of molecular interactions and structural effects within the mixtures. The Jouyban-Acree model effectively captured the composition and temperature dependence of densities and sound speeds, and their closely related properties, namely isobaric thermal expansivities and isentropic compressibilities, of the studied binary and ternary mixtures with an optimized set of adjustable parameters. Finally, the ternary excess molar volumes and excess isentropic compressibilities were compared with the predicted values from binary contribution symmetric (Kohler and Muggianu) and asymmetric (Hillert and Toop) models. Kohler symmetric model effectively predicted the excess molar volumes, while the asymmetric Hillert model yielded superior prediction for excess isentropic compressibility, particularly when <i>n</i>-hexane was treated as the asymmetric component.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100270","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