International Journal of Thermophysics最新文献_第2页

Proposal for a Thermal Diode with Low-Environmental-Impact Materials for Thermosolar Applications

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03513-9

Herminio Rebollo Sandoval, Luis Mariano Hernández Ramírez, Luis Bernardo López-Sosa

{"title":"Proposal for a Thermal Diode with Low-Environmental-Impact Materials for Thermosolar Applications","authors":"Herminio Rebollo Sandoval, Luis Mariano Hernández Ramírez, Luis Bernardo López-Sosa","doi":"10.1007/s10765-025-03513-9","DOIUrl":"10.1007/s10765-025-03513-9","url":null,"abstract":"<div>A thermal diode is a component that allows heat flow in one direction while opposing it in the opposite direction. Its applications are wide, for example, it has recently been used for solar energy harvesting and in solar thermal technologies. This work studies a coating made with biomass soot and pine resin, which absorbs and stores captured energy with a preferential heat flow system. The research consists of 3 stages: (a) evaluating the thermal conductivity of soot through experimental arrangements with simple materials and equipment, (b) estimating the thermal rectification of the coating, and (c) applying the soot as a thermal diode in a small-scale system. The results show thermal conductivity values from 0.070 W·mK−1 to 0.095 W·mK−1 for the soot-resin coating, while the rectification factor was 21 % and 53 % for the best coating of 30 % soot–70 % pine resin and the double layer with 10 % soot and 90 % resin, respectively. The soot coating in a small-scale system showed thermal rectification associated with energy charging and discharging, with energy collection efficiency of 34 % and retention efficiency of 17 %. Compared to low-cost paint used in solar technologies, 31.4 % collection efficiency and 8.4 % retention efficiency were achieved. The coating is low-cost, environmentally friendly, and easy to reproduce, showing promise for use in low-power solar thermal technologies, to increase energy storage capacity as a thermal diode.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481076","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

Thermal Diffusivity Measurements for High Thermal Conductive Materials by Applying Undersampling to Lock-in Thermography

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03523-7

Yudai Kaneko, Ryohei Fujita, Takuya Ishizaki, Hosei Nagano

{"title":"Thermal Diffusivity Measurements for High Thermal Conductive Materials by Applying Undersampling to Lock-in Thermography","authors":"Yudai Kaneko, Ryohei Fujita, Takuya Ishizaki, Hosei Nagano","doi":"10.1007/s10765-025-03523-7","DOIUrl":"10.1007/s10765-025-03523-7","url":null,"abstract":"<div>In this study, a method employing lock-in thermography is proposed for measuring the thermal diffusivity distribution of materials with high thermal conductivity. In this method, the thermal response distribution induced by periodic laser heating is analyzed, and the thermal diffusivity in the out-of-plane direction over the material surface is mapped. An undersampling method is applied during lock-in thermography to measure the thermal diffusivity distribution of materials with low thermal resistance at high frequencies. Additionally, a principle is developed to eliminate the inherent phase lag generated by the measurement system. The accuracy of the proposed method is validated by quantitatively measuring the thermal diffusivity of a pure copper sheet that exhibits an isotropic thermal diffusivity distribution. Results reveal that its average thermal diffusivity agreed with the reference value within + 2.4 %. The proposed method is also used to measure the thermal diffusivity of an isotropic graphite sheet with an inhomogeneous thermal diffusivity distribution. Results reveal that its average thermal diffusivity agreed with the reference value within + 7.0 %, and local areas with high thermal diffusivity are successfully visualized.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481077","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

Theoretical Investigation of Solar Bubble Pump to Lift Water

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-19 DOI: 10.1007/s10765-025-03519-3

Ihab Omar, Dhuha Radhi Nayyef, Ahmed Mohammed Jamal AMRLE, Ahmed A. M. Saleh

{"title":"Theoretical Investigation of Solar Bubble Pump to Lift Water","authors":"Ihab Omar, Dhuha Radhi Nayyef, Ahmed Mohammed Jamal AMRLE, Ahmed A. M. Saleh","doi":"10.1007/s10765-025-03519-3","DOIUrl":"10.1007/s10765-025-03519-3","url":null,"abstract":"<div>In various engineering applications, particularly pumping systems, two-phase flows that involve the simultaneous flow of two different states of matter are widely employed. For instance, in industrial settings, the utilization of an airlift pump is common for transferring air or other gases to lift liquid. Conversely, in diffusion-absorption refrigeration cycles, a bubble pump is employed to create a two-phase flow through fluid boiling. To comprehend the impact of design and operational parameters on the lift water bubble pump, a comprehensive theoretical study was undertaken. The engineering equation solver (EES) was utilized in this investigation to examine the influence of lift pipe diameter, heat flux, and mass flux on the performance of the bubble pump. The study’s findings revealed that a single set of optimal conditions and values cannot be universally applicable to the bubble pump. This is because each system possesses unique characteristics and operational parameters, leading to a distinct set of optimized parameters. The theoretical study on the lift water bubble pump underscores the significance of considering design and operational parameters while developing and operating pumping systems that employ two-phase flow. Moreover, it emphasizes the necessity for extensive research to establish optimal conditions and values tailored to the specific characteristics and operating parameters of each individual system.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03519-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446488","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

Joule–Thomson Inversion Curves of Helium Isotopologues from Theoretical Virial Coefficients

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-19 DOI: 10.1007/s10765-025-03518-4

Kohei Tada

引用次数: 0

Study of Glycolic and Lactobionic Acids in Water-Soluble Sodium Benzoate Solutions: An Acoustic and Thermodynamic Approaches

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-19 DOI: 10.1007/s10765-025-03517-5

Ashpinder Kaur Gill, Nabaparna Chakraborty, K. C. Juglan

{"title":"Study of Glycolic and Lactobionic Acids in Water-Soluble Sodium Benzoate Solutions: An Acoustic and Thermodynamic Approaches","authors":"Ashpinder Kaur Gill, Nabaparna Chakraborty, K. C. Juglan","doi":"10.1007/s10765-025-03517-5","DOIUrl":"10.1007/s10765-025-03517-5","url":null,"abstract":"<div>The thermodynamic behavior of glycolic and lactobionic acids in aqueous sodium benzoate solution provides an understanding of the nature of interactions with such systems. The experimental investigation involved measuring the density, denoted by ‘ρ,’ as well as the sound speed, represented by ‘c.’ Ultrasonic and volumetric characteristics for the liquid system (Sodium Benzoate + Water + Glycolic Acid/Lactobionic Acid) are investigated throughout a range of potassium benzoate concentrations (0.1, 0.4, 0.7) mol‧kg−1 at a fixed pressure and several temperatures. The investigational values of densities and sound velocities were utilized to calculate various parameters, including apparent and partial molar characteristics, transfer parameters, expansibilities, temperature-dependent derivatives, and the coefficient of thermal expansibility. The findings are interpreted by examining the interactions occurring within the liquid system, using the co-sphere overlap approach as a theoretical framework. Thermodynamic parameters are employed to analyze interaction coefficients, which provide an understanding of the interactions between components in the ternary liquid combinations.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03517-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446457","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

Vapor Pressure Measurement for trans-1,2-Dichloroethene [R1130(E)]

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-17 DOI: 10.1007/s10765-025-03515-7

Ryo Akasaka, Sota Yamashita, Sho Fukuda, Yukihiro Higashi

引用次数: 0

Numerical Investigation of Drug Delivery Mechanisms in Pulsatile Flow with Machine Learning Approach

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-17 DOI: 10.1007/s10765-025-03514-8

Yasmeen Akhtar, Shabbir Ahmad, Hamiden Abd El-Wahed Khalifa, Ahmed S. Hendy, Badria Almaz Ali Yousif, Raga Idress

{"title":"Numerical Investigation of Drug Delivery Mechanisms in Pulsatile Flow with Machine Learning Approach","authors":"Yasmeen Akhtar, Shabbir Ahmad, Hamiden Abd El-Wahed Khalifa, Ahmed S. Hendy, Badria Almaz Ali Yousif, Raga Idress","doi":"10.1007/s10765-025-03514-8","DOIUrl":"10.1007/s10765-025-03514-8","url":null,"abstract":"<div>This study is significant as it introduces an innovative approach to improving cancer drug delivery. It integrates machine learning algorithms, potentially revolutionizing treatment precision and efficiency. The study investigates nanoparticles modeled using a Levenberg–Marquardt neural network (LM-NN). These nanoparticles can act as dual-function agents to enhance drug delivery to tumors and reduce harmful hydrogen peroxide levels in the bloodstream. The research methodology includes modeling blood flow as pulsatile within a parallel plate channel. It also incorporates porous media to simulate foamy structures. The study addresses heat transfer dynamics and chemically reactive species. It uses nanoparticle concentration equations that account for diffusion, convection, and chemical reaction processes. The study concludes that combining machine learning with fluid dynamics modeling greatly improves the understanding of drug delivery efficiency. It also highlights its impact on physiological factors. Heat transfer, Reynolds number, and parameters like Darcy and Forchheimer are vital for optimizing the delivery of therapeutic agents. Magnetic fields and Schmidt numbers are crucial for regulating blood flow and enhancing treatment outcomes. These insights could lead to improved treatment protocols and better management of blood flow within the cardiovascular system, particularly in areas targeted for cancer treatment. By optimizing drug delivery to cancer tissues, this approach could potentially lower side effects through more controlled and efficient targeting of therapeutic agents. Additionally, the research emphasizes the critical role of computational models in refining drug delivery strategies, offering a pathway toward more personalized and effective cancer treatment protocols in the future.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423205","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

Investigating the Interactions of Methyl Butanoate with 2-Alkanols Through Molecular Modeling and Experimental Techniques

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-17 DOI: 10.1007/s10765-025-03520-w

Mohammad Almasi, Ariel Hernández

引用次数: 0

Reference Correlation of the Thermal Conductivity of Nitrogen from the Triple Point to High Temperatures and Pressures

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-13 DOI: 10.1007/s10765-025-03516-6

Sofia G. Sotiriadou, Marc J. Assael, Marcia L. Huber

{"title":"Reference Correlation of the Thermal Conductivity of Nitrogen from the Triple Point to High Temperatures and Pressures","authors":"Sofia G. Sotiriadou, Marc J. Assael, Marcia L. Huber","doi":"10.1007/s10765-025-03516-6","DOIUrl":"10.1007/s10765-025-03516-6","url":null,"abstract":"<div>A new wide-ranging correlation for the thermal conductivity of nitrogen, based on the most recent ab initio dilute gas theoretical calculations, a simplified crossover critical enhancement contribution, and critically evaluated experimental data, is presented. The correlation is designed to be used with a high-accuracy Helmholtz equation of state over the range of temperatures from the triple-point temperature to 1000 K, and at pressures up to 2200 MPa. The estimated expanded uncertainty (at the 95 % confidence level) in the range of validity of the correlation ranges from a minimum of 1 % in the gas phase for temperatures from 102 K to 700 K at pressures up to 1 MPa, to 4 % in the high temperature, high pressure region covering 500 K < T < 744 K at pressures from 1 MPa to 40 MPa. In the gas and supercritical region 112 K < T < 475 K for pressures 1 MPa < p < 1000 MPa the estimated uncertainty is 2.2 %, and for the liquid from 81 K to 122 K at pressures up to 70 MPa the estimated uncertainty is 3 %. The correlation behaves in a physically reasonable manner when extrapolated to temperatures below the triple point and is suitable for use in certain corresponding-states applications. However, care should be taken when using the correlation outside of the experimentally validated range.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03516-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396689","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

Thermophysical Properties of NbAlO4 and TaAlO4

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-08 DOI: 10.1007/s10765-025-03512-w

Julian Gebauer, Magnus Rohde, Peter Franke, Hans Jürgen Seifert

{"title":"Thermophysical Properties of NbAlO4 and TaAlO4","authors":"Julian Gebauer, Magnus Rohde, Peter Franke, Hans Jürgen Seifert","doi":"10.1007/s10765-025-03512-w","DOIUrl":"10.1007/s10765-025-03512-w","url":null,"abstract":"<div>Thermophysical properties of the ternary oxides NbAlO4 and TaAlO4 are experimentally determined. For NbAlO4, the molar heat capacity is 98.9 J (mol(cdot)K)−1 at 0 (^{circ })C up to 155.6 J (mol(cdot)K)−1 at 950 (^{circ })C and for TaAlO4 97.1 J (mol(cdot)K)−1 at 0 (^{circ })C up to 154.2 J (mol(cdot)K)−1 at 950 (^{circ })C, respectively. Maier-Kelley polynomials are provided for the molar heat capacities. Thermal diffusivities in the range from 20 (^{circ })C to 700 (^{circ })C ((alpha _{NbAlO_{4}}): from 0.009 to 0.004 cm2·s−1 and (alpha _{TaAlO_{4}}): from 0.017 to 0.005 cm2·s−1), bulk densities at 25 (^{circ })C ((rho _{NbAlO_{4}})= 3.94 g(cdot)cm−3 and (rho _{TaAlO_{4}})= 6.07 g·cm−3) and melting points of the oxides are measured, and the thermal conductivities are calculated from these properties. The thermal conductivity from 20 (^{circ })C to 700 (^{circ })C of NbAlO4 (lambda _{ NbAlO_{4}}) is in the range from 0.020 to 0.013 W·cm−1·K−1 and of TaAlO4 (lambda _{TaAlO_{4}}) in the range from 0.039 to 0.015 W·cm−1·K−1, respectively. A porosity correction for thermal conductivities is applied, and with that, data for perfectly dense material are provided.</div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03512-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361838","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