Journal of Non-Equilibrium Thermodynamics最新文献_第10页

Maximum ecological function performance for a three-reservoir endoreversible chemical pump 三储层内可逆化学泵的最大生态功能性能

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-07 DOI: 10.1515/jnet-2022-0062

Lingen Chen, Shuangshuang Shi, H. Feng, Y. Ge

{"title":"Maximum ecological function performance for a three-reservoir endoreversible chemical pump","authors":"Lingen Chen, Shuangshuang Shi, H. Feng, Y. Ge","doi":"10.1515/jnet-2022-0062","DOIUrl":"https://doi.org/10.1515/jnet-2022-0062","url":null,"abstract":"Abstract Endoreversible chemical pump (ECP) is a theoretical model of electrochemical, photochemical, solid-state apparatus and mass exchangers. ECP can be classified as two-, three- and four-mass-reservoir devices. The usual performance indicators for ECPs are energy pumping rate (EPR) and coefficient of performance (COP). Energy-based ecological function objective (EFO) is introduced to performance optimization of three-reservoir ECP. Optimization relationships between EFO and COP with linear and diffusive mass transfer laws (MTLs) are deduced. Numerical examples are provided, and influences of cycle parameters and MTLs on optimal EFO performances are analyzed. For linear MTL, compared performances at maximum EFO point and point where dimensionless EPR is 0.016, COP increases 14.4% and entropy generation rate (EGR) drops 52% with only 30% loss of EPR. For diffusive MTL, compared performances at maximum dimensionless EFO point and point where dimensionless EPR is 0.01, COP increases 11.3% and EGR drops 46.9% with only 30% loss of EPR. It demonstrates that EFO is a trade-off between EPR and dissipation of EPR, which is beneficial to utilize energy effectively. With the same chemical potentials of three reservoirs, the maximum dimensionless EFO and the corresponding COP with linear MTL are bigger than those with diffusive MTL.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"179 - 194"},"PeriodicalIF":6.6,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42777760","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}

引用次数: 12

Non-equilibrium thermodynamics modelling of the stress-strain relationship in soft two-phase elastic-viscoelastic materials 软质两相弹性粘弹性材料应力-应变关系的非平衡热力学模型

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-05 DOI: 10.1515/jnet-2022-0069

Pavlos S. Stephanou, P. Vafeas, V. Mavrantzas

{"title":"Non-equilibrium thermodynamics modelling of the stress-strain relationship in soft two-phase elastic-viscoelastic materials","authors":"Pavlos S. Stephanou, P. Vafeas, V. Mavrantzas","doi":"10.1515/jnet-2022-0069","DOIUrl":"https://doi.org/10.1515/jnet-2022-0069","url":null,"abstract":"Abstract In “soft–soft nanocomposites” based on film formation of latexes with structured particles, the combination of particle structure and interparticle crosslinking leads to materials that behave as nonlinear viscoelastic fluids at small strains and as highly elastic networks at larger strains. Similarly, in studies of flow-induced crystallization in polymers, a two-phase model is often invoked in which a soft viscoelastic component is coupled with a rigid semi-crystalline phase providing stiffness. In the present work, we use the framework of non-equilibrium thermodynamics (NET) to develop stress-strain relationships for such two-phase systems characterized by a viscoelastic and an elastic component by making use of two conformation tensors: the first describes the microstructure of the viscoelastic phase while the second is related to the elastic Finger strain tensor quantifying the deformation of the elastic phase due to strain and is responsible for strain-hardening. The final transport equations are formulated in the context of the generalized bracket formalism of NET and can describe the rheological behavior and mechanical response of a large variety of soft materials ranging from rubbers to artificial tissues.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"91 - 105"},"PeriodicalIF":6.6,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46637219","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}

引用次数: 1

Nonlinear dynamics of blood passing through an overlapped stenotic artery with copper nanoparticles 非线性动力学的血液通过重叠狭窄动脉与铜纳米颗粒

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-05 DOI: 10.1515/jnet-2022-0063

Hanumesh Vaidya, I. L. Animasaun, K. Prasad, C. Rajashekhar, J. U. Viharika, Q. Al‐Mdallal

{"title":"Nonlinear dynamics of blood passing through an overlapped stenotic artery with copper nanoparticles","authors":"Hanumesh Vaidya, I. L. Animasaun, K. Prasad, C. Rajashekhar, J. U. Viharika, Q. Al‐Mdallal","doi":"10.1515/jnet-2022-0063","DOIUrl":"https://doi.org/10.1515/jnet-2022-0063","url":null,"abstract":"Abstract The dynamics of blood carrying microscopic copper particles through overlapping stenotic arteries is an important research area needed for scrutinizing and exploring dynamics through blood vessels. Adipose tissue deposition and other elements of atherosclerosis generate the uncommon artery disease known as arterial stenosis. It limits blood flow and raises the risk of heart disease. Using the Casson model, it is feasible to shed light on the peristaltic blood flow of copper nanoparticles over an overlapping stenotic artery. Nothing is known about the study of heat sink/source, buoyancy and Lorent force, and volume fraction because the focus is on the dynamics of blood carrying minute copper particles through an overlapping stenotic artery. When the Lorentz force is significant, the transport mentioned above was evaluated utilizing stenosis approximations to examine the stream function, wall shear stress, Nusselt number, and flow resistance distribution. In addition, temperature solutions were identified analytically, whereas a perturbation approach acquired velocity solutions. Temperature distribution and velocity are greater in stenosed arteries than in unstenosed arteries. Furthermore, extreme velocity and temperature rise as it reaches the core of the artery and falls as one approaches the wall. When the heat source parameter values increase due to an improvement in the fluid’s thermal state, the temperature distribution increases.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"159 - 178"},"PeriodicalIF":6.6,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47004450","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}

引用次数: 6

Minimum power consumption of multistage irreversible Carnot heat pumps with heat transfer law of q ∝ (ΔT) m 传热规律为q∞（ΔT）m的多级不可逆卡诺热泵的最小功耗

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-05 DOI: 10.1515/jnet-2022-0068

Lingen Chen, Shaojun Xia

引用次数: 13

Jeffery-Hamel flow extension and thermal analysis of Oldroyd-B nanofluid in expanding channel Oldroyd-B纳米流体在膨胀通道中的jeffrey - hamel流动扩展及热分析

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-02 DOI: 10.1515/jnet-2022-0052

A. Boudjemline, I. Ahmad, Sohail Rehman, Hashim, N. Khedher

{"title":"Jeffery-Hamel flow extension and thermal analysis of Oldroyd-B nanofluid in expanding channel","authors":"A. Boudjemline, I. Ahmad, Sohail Rehman, Hashim, N. Khedher","doi":"10.1515/jnet-2022-0052","DOIUrl":"https://doi.org/10.1515/jnet-2022-0052","url":null,"abstract":"Abstract We present a novel theoretical model to investigate the pressure-driven flow of a non-Newtonian Oldroyd-B nanofluid in an expanding channel. The momentum and temperature field equations are developed on the bases of momentum conservation law and Fourier’s principle of heat transfer in conjunction with Buongiorno’s model of nanofluids. Numerical investigations on a viscoelastic Oldroyd-B fluid flowing in horizontal, converging, and diverging channel have been carried out to collect point-by-point stress data i.e., the shear stresses and flow field). The constitutive model of a viscoelastic fluid adopting the Oldroyd-B model is considered to characterize the rheological behavior of the fluid. The flow equations are changed to a non-linear system and solved numerically using the Runge–Kutta Butcher method via MATLAB code. Numerous emerging flow parameters are probed for their effects on flow and heat transfer characteristics using extensive numerical computing. In converging flow, increasing the Reynolds number and channel angle leads to an increase in velocity distribution, indicating that backflow is eliminated. However, the velocity decreases as the retardation parameter increases significantly. Furthermore, the Oldroyd-B nano liquid literature is elevated by the Brownian motion and thermophoresis parameter, while for the concentration of the nanoparticles the behavior is contrary. The velocity field of an Oldroyd-B fluid is compared with the velocity fields for viscous fluids, which are then traced out as limiting instances. In comparison, the results for polymer solutions obtained in this analysis are compared with a Newtonian fluid.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"75 - 90"},"PeriodicalIF":6.6,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48192118","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}

引用次数: 5

Densities and isothermal compressibilities from perturbed hard-dimer-chain equation of state: application to nanofluids 扰动硬二聚体链状态方程的密度和等温压缩率：在纳米流体中的应用

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-12-01 DOI: 10.1515/jnet-2022-0046

M. Taghizadehfard, S. Hosseini, M. Pierantozzi, M. Alavianmehr

{"title":"Densities and isothermal compressibilities from perturbed hard-dimer-chain equation of state: application to nanofluids","authors":"M. Taghizadehfard, S. Hosseini, M. Pierantozzi, M. Alavianmehr","doi":"10.1515/jnet-2022-0046","DOIUrl":"https://doi.org/10.1515/jnet-2022-0046","url":null,"abstract":"Abstract Densities and isothermal compressibilities of several nanofluids were modelled using a perturbed hard-chain equation of state (EoS) by an attractive term from Yukawa tail in 273–363 K range and pressure up to 45 MPa. The nanofluids of interest comprise TiO2-Anatase (-A), TiO2-Rutile (-R), SnO2, Co3O4, CuO, ZnO, and Al2O3 as nanoparticles dispersed in ethylene glycol, water, poly ethylene glycol, ethylene glycol + water, and poly ethylene glycol + water as base fluids. The EoS was capable of estimating 1397 density data of 9 nanofluids with the overall average absolute deviations (AAD) of 0.90%. The coefficients of isothermal compressibility of 6 selected nanofluids were also predicted using the EoS with the AAD of 5.74% for 1095 data points examined. The PHDC EoS was not capable of estimating the excess volumes of 3 selected EG-, PEG-, and water-based nanofluids accurately as the relative deviations from the literature data were greater than 34%, even though the trend of results against the nanoparticle concentration was in accord with the literature. To further investigate the density prediction, we have trained a neural network with a single hidden layer and 17 neurons which was able to predict the densities of nanofluids accurately.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"55 - 73"},"PeriodicalIF":6.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44211772","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}

引用次数: 1

Influence of drive chamber discharging process on non-linear displacer dynamics and thermodynamic processes of a fluidic-driven Gifford-McMahon cryocooler 驱动室放料过程对流体驱动Gifford-McMahon制冷机非线性驱油动力学和热力学过程的影响

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-11-24 DOI: 10.1515/jnet-2022-0073

D. Panda, M. Kumar, Suraj K. Behera, A. Satapathy, S. Sarangi

{"title":"Influence of drive chamber discharging process on non-linear displacer dynamics and thermodynamic processes of a fluidic-driven Gifford-McMahon cryocooler","authors":"D. Panda, M. Kumar, Suraj K. Behera, A. Satapathy, S. Sarangi","doi":"10.1515/jnet-2022-0073","DOIUrl":"https://doi.org/10.1515/jnet-2022-0073","url":null,"abstract":"Abstract Continuous effort is made on Gifford-McMahon cryocoolers (GMC) to amplify its refrigeration power, so they can be used to cool the cryopumps, high Tc magnets and development of efficient small-scale hydrogen liquefiers, etc. The fluidic-driven GMC is considered to be more reliable and prominent candidate than the mechanically-driven GMC due to its structural simplicity and reliability. Nonetheless, cooling mechanism of the fluidic-driven GMC is complicated, as the displacer motion inside the displacer cylinder is simultaneously controlled by the pressure difference between drive chamber and compression/expansion chamber. Different paths of displacer can be traced inside the displacer cylinder for different drive-chamber discharging process, hence, pressure–volume power of compression and expansion chambers, and refrigeration power changes. A theoretical study is conducted in present paper to visualize the influence of drive-chamber discharging process on the thermodynamic characteristics of fluidic-driven GMC for the first time. Thermodynamic cycles are drawn at the expansion chamber of the fluidic-driven GMC for different values of drive-chamber discharging process for two types of valve timing arrangements. Energy and work loss behaviors in different components of the GMC are also analysed. Adequate experimental investigations have also been carried out on a fluidic-driven displacer type GMC to verify the simulation results.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"1 - 23"},"PeriodicalIF":6.6,"publicationDate":"2022-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47751819","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}

引用次数: 1

Maximum work configuration of finite potential source endoreversible non-isothermal chemical engines 有限势源内可逆非等温化学发动机的最大功构型

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-11-18 DOI: 10.1515/jnet-2022-0045

Lingen Chen, Shaojun Xia

{"title":"Maximum work configuration of finite potential source endoreversible non-isothermal chemical engines","authors":"Lingen Chen, Shaojun Xia","doi":"10.1515/jnet-2022-0045","DOIUrl":"https://doi.org/10.1515/jnet-2022-0045","url":null,"abstract":"Abstract Chemical engine is an abstract model of some devices, such as solid state, photochemical, and electrochemical devices, photovoltaic cell, and mass exchangers. Finite chemical-potential source is one of its features. Finite time thermodynamics provides effective theoretical tool for determining performance limits for given thermal systems, and determining optimal process paths of thermal systems for given performance objectives. Endoreversible model is its basic model. A model of endoreversible non-isothermal chemical engines operating between a finite chemical-potential source and an infinite chemical-potential sink with mass resistance and heat resistance is established. Mass transfer processes between chemical potential reservoir and working fluid of the model are assumed to obey Onsager equations in linear irreversible thermodynamics. With a fixed cycle period, optimal cycle configuration for the maximum work output of the model is derived by applying optimal control theory. The results obtained include optimal performance and optimal path results in many previous literatures, and can provide some theoretical guidelines for optimal designs of practical chemical plants.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"48 1","pages":"41 - 53"},"PeriodicalIF":6.6,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49584299","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}

引用次数: 15

Stability Analysis of Double Diffusive Convection in Local Thermal Non-equilibrium Porous Medium with Internal Heat Source and Reaction Effects 具有内热源和反应效应的局部热非平衡多孔介质双扩散对流稳定性分析

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-09-20 DOI: 10.1515/jnet-2022-0047

N. Noon, S. Haddad

引用次数: 3

Thermoelectric Response Characteristics of Bi2Te3 Based Semiconductor Materials Bi2Te3基半导体材料的热电响应特性

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-09-16 DOI: 10.1515/jnet-2022-0049

Zhanxuan Wang, Xiulian Cheng, K. Guo, Enling Tang, Lei Li, Hui Peng, Yafei Han, Chuang Chen, Mengzhou Chang, Liping He

{"title":"Thermoelectric Response Characteristics of Bi2Te3 Based Semiconductor Materials","authors":"Zhanxuan Wang, Xiulian Cheng, K. Guo, Enling Tang, Lei Li, Hui Peng, Yafei Han, Chuang Chen, Mengzhou Chang, Liping He","doi":"10.1515/jnet-2022-0049","DOIUrl":"https://doi.org/10.1515/jnet-2022-0049","url":null,"abstract":"Abstract In actual operation, the operating environment temperature of thermoelectric devices are constantly changing and rarely remain stable, and the electrical output characteristics of thermoelectric devices are largely determined by thermoelectric materials. In response to this question, the thermoelectric properties of thermoelectric materials (p and n type Bi 2 Te 3 {mathrm{Bi}_{2}}{mathrm{Te}_{3}}) are measured under different temperature difference environments. The Seebeck coefficient, resistivity, and thermal conductivity of the specimens at T = 300 – 600 KT=300text{--}600hspace{0.1667em}text{K} were measured by CTA-4 and CLA1000 (laser flash method), respectively; the thermal and electrical output responses of the thermoelectric materials under different temperature difference conditions were collected in real time by using a self-built thermoelectric performance test platform, thermal/electrical test system with infrared thermal imager, and voltage acquisition system, respectively. The experimental results show that when the temperature difference between the two ends of the specimen increases uniformly, the electrical output signal amplitude also increases uniformly; when the temperature difference is stable, the two ends of the specimen also produce a stable electrical output signal. After stabilization, the electrical output signal amplitude also decreases uniformly when the temperature decreases at a uniform rate. In the temperature range of 298 ∼ 573 K298sim 573hspace{0.1667em}text{K}, the larger the temperature difference between the two ends of the specimen was, the larger the amplitude of the electrical output signal was after stabilization; and vice versa. The greater the loading rate of the thermal load was, the greater the rate of increase of the electrical output signal amplitude at both ends of the specimen was, and the steady-state equilibrium time required was less.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"47 1","pages":"355 - 373"},"PeriodicalIF":6.6,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49267425","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}

引用次数: 0