Heat Transfer最新文献_第4页

Thermosolutal Convection in Dual-Porosity Media With Generalized Boundary Conditions and Magnetic Field Effect 双孔隙介质中具有广义边界条件和磁场效应的热溶质对流

IF 2.6

Heat Transfer Pub Date : 2025-06-16 DOI: 10.1002/htj.23415

Sanaa L. Khalaf, Akil J. Harfash

{"title":"Thermosolutal Convection in Dual-Porosity Media With Generalized Boundary Conditions and Magnetic Field Effect","authors":"Sanaa L. Khalaf, Akil J. Harfash","doi":"10.1002/htj.23415","DOIUrl":"https://doi.org/10.1002/htj.23415","url":null,"abstract":"<div>\u0000 \u0000 <p>This study offers an in-depth examination of thermosolutal convection stability in dual-porosity media, emphasizing the influence of chemical hydrodynamics under a magnetic field. The governing equations are formulated based on fundamental principles of fluid mechanics and chemical kinetics, encapsulating the interplay between convection and reaction rates. In addition, we formulated generalized boundary conditions that explicitly incorporate the influence of the gradients in both solute concentration and temperature on the boundary layers, thereby enhancing the theoretical model's realism and extending their applicability. In this context, two algorithms have been developed for studying linear instability and nonlinear stability, utilizing Chebyshev collocation methods to ascertain stability boundaries and delineate the system's linear and nonlinear behaviors. Ultimately, extensive parametric studies reveal that the interplay between thermal and solutal gradients, further modulated by magnetic field-induced chemical reactions, fundamentally dictates the instability and stability thresholds of the critical thermal Rayleigh number, signifying the onset of convective instability and stability. In fact, this study offers assistance in understanding the complex interactions of these effects in double-diffusive convection within dispersive porous media, thus enhancing applications in environmental engineering and materials processing.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4351-4371"},"PeriodicalIF":2.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydromagnetic Peristaltic Propulsion of a Pseudoplastic Fluid Through a Porous Symmetric Channel With Wall Properties 假塑性流体通过具有壁性的多孔对称通道的磁蠕动推进

IF 2.6

Heat Transfer Pub Date : 2025-06-13 DOI: 10.1002/htj.70004

R. Saravana, K. Vajravelu, R. Hemadri Reddy, K. V. Narasimha Murthy

{"title":"Hydromagnetic Peristaltic Propulsion of a Pseudoplastic Fluid Through a Porous Symmetric Channel With Wall Properties","authors":"R. Saravana, K. Vajravelu, R. Hemadri Reddy, K. V. Narasimha Murthy","doi":"10.1002/htj.70004","DOIUrl":"https://doi.org/10.1002/htj.70004","url":null,"abstract":"<div>\u0000 \u0000 <p>Simulations of biological fluids aid in understanding processes like peristalsis and improve medical interventions like blood flow management during surgery. This investigation explores the use of pseudoplastic fluid to improve friction management and extends the lifespan of mechanical components, while also facilitating smooth material flow and maintaining consistent product quality in food processing. The unique rheological smooth and controlled flow has several applications in topical gels, blood mimicry, cosmetic lotions, and paint coating. The relevant peristaltic propulsion investigation is concerned with the hydromagnetic pseudoplastic fluid flow within a symmetric sinusoidal porous channel, considering the wall properties and heat transfer. A regular perturbation scheme is used to solve the nonlinear equations with no-slip wavy boundary conditions, long wavelength, and low Reynolds number assumptions. The analytical solutions for the flow, thermal fields, and the propagating of thermal transfer coefficient across the walls are derived. The insights of the significant physical parameters on the flow fields are effectively examined and analyzed graphically. The Darcy parameter accelerates the rheological behavior of pseudoplastic flow characteristics in the flow and heat transfer fields, such as velocity, temperature, and stream function, while magnetic force, acting as a body force, decelerates the pseudoplastic fluid flow, causing the fluid to become more rigid. Furthermore, the trapping phenomenon is obtained with the help of Mathematica software, revealing that bolus circulation increases with higher membrane tension and mass characterization, but reduces due to higher viscous damping.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4444-4456"},"PeriodicalIF":2.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical Solutions to MHD Flow Model Across an Inclined Channel With Induced Magnetic Field and Radiation Absorption Effect 考虑感应磁场和辐射吸收效应的倾斜通道MHD流动模型的解析解

IF 2.6

Heat Transfer Pub Date : 2025-06-13 DOI: 10.1002/htj.23414

Deepti, Jyoti

{"title":"Analytical Solutions to MHD Flow Model Across an Inclined Channel With Induced Magnetic Field and Radiation Absorption Effect","authors":"Deepti,  Jyoti","doi":"10.1002/htj.23414","DOIUrl":"https://doi.org/10.1002/htj.23414","url":null,"abstract":"<div>\u0000 \u0000 <p>This study emphasizes the significance of radiation absorption effects on magnetohydrodynamics flow of chemically reacting Newtonian fluid across an inclined channel. The induced magnetic field component is taken into consideration in the flow equations. The system of differential equations of this flow model under observation is transformed into non-dimensional form to get its solutions. The significance of the fluid model, viz. velocity distribution, temperature distribution, and concentration distribution is examined graphically under the factors: induced magnetic field, chemical reaction, and radiation absorption. Further, the other important attributes of the flow system: Skin friction, Nusselt number, and Sherwood number are calculated and their implications are discussed. The key findings include the suppression of velocity with increased Hartmann number, chemical reaction parameter, and inclination angle, while the induced magnetic field and induced current density show distinct patterns due to different governing parameters. Radiation, chemical reaction, and mass diffusivity affect temperature and species concentration profiles.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4337-4350"},"PeriodicalIF":2.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activity of Motile Microorganisms in Radiative Heat Transfer Analysis of Chemically Reactive Flow Between Stretching Upper and Rotating Lower Disks 上下盘伸展和旋转化学反应流辐射传热中活动微生物的活性分析

IF 2.6

Heat Transfer Pub Date : 2025-06-13 DOI: 10.1002/htj.70001

Vishwanatha R. Banakar, Thanesh Kumar, T. Ramachandran, A. Karthikeyan, K. Karthik

{"title":"Activity of Motile Microorganisms in Radiative Heat Transfer Analysis of Chemically Reactive Flow Between Stretching Upper and Rotating Lower Disks","authors":"Vishwanatha R. Banakar, Thanesh Kumar, T. Ramachandran, A. Karthikeyan, K. Karthik","doi":"10.1002/htj.70001","DOIUrl":"https://doi.org/10.1002/htj.70001","url":null,"abstract":"<div>\u0000 \u0000 <p>The fluid flow between two parallel disks subjected to a low-oscillating magnetic field has important applications in magnetohydrodynamic systems, where controlling the flow of electrically conducting fluid is essential. This setup is used in cooling systems for advanced electronics and nuclear reactors, where precise thermal management is required. In view of this, the current investigation explores the effect of a low-oscillating magnetic field on the liquid flow with bio-convection and moving motile microorganisms between two parallel disks. It is expected that the lower disk is rotating, while the upper disk is stretching. Additionally, the consequence of non-uniform heat source/sink, non-linear thermal radiation, and chemical reaction on the fluid flow is considered in the analysis. The current issue's governing partial differential equations (PDEs) are transformed into dimensionless ordinary differential equations (ODEs) using appropriate similarity variables. The resultant ODEs are numerically solved using Runge Kutta Fehlberg's fourth-fifth order (RKF-45) approach. The significance of several parameters on the various profiles is depicted with graphic illustrations. The results indicate that higher solid volume fraction and effective magnetization parameter enhance radial velocity while reducing tangential velocity. The thermal profile intensifies with the improvement of radiation and heat source/sink parameters. The microorganism profile drops with the increase in values of Lewis and Peclet numbers.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4390-4406"},"PeriodicalIF":2.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical Observations of Blast Wave Behavior for Generalized Chaplygin Gas 广义Chaplygin气体爆炸波特性的分析观察

IF 2.6

Heat Transfer Pub Date : 2025-06-13 DOI: 10.1002/htj.23412

Dhanpal Singh, Ekta Jain

引用次数: 0

Energy Investigation on Combined Power, Cooling, and District Water Heating System 电、冷、热水联产系统的能源研究

IF 2.6

Heat Transfer Pub Date : 2025-06-11 DOI: 10.1002/htj.70000

D. Manivannan, N. Shankar Ganesh, A. R. Pradeep Kumar, T. Srinivas

{"title":"Energy Investigation on Combined Power, Cooling, and District Water Heating System","authors":"D. Manivannan, N. Shankar Ganesh, A. R. Pradeep Kumar, T. Srinivas","doi":"10.1002/htj.70000","DOIUrl":"https://doi.org/10.1002/htj.70000","url":null,"abstract":"<div>\u0000 \u0000 <p>The current study has taken into account district water heating (DWH), cooling, and power generation systems that are integrated. This study aims to determine the temperature and flow rate of the waste heat from the multifuel research engine, which runs on gasoline, diesel, and biofuel. The waste heat is used in an organic Rankine cycle's (ORC) heat recovery system to produce electricity and also contribute to the environment through a DWH system. The vapor compression refrigeration system is driven by the heat generated by the ORC. This system's performance has been investigated using three distinct working fluids. Engine load and compression ratio are used to assess the whole system's performance. For the working fluids under consideration, the first law assessment is carried out using the Engineering Equation Solver. For the working fluid <i>O</i>-xylene, the maximum energy efficiency value for 80% load conditions is 18.59% with a compression ratio of 17. Given an engine load of 80% and a compression ratio of 16.5 for <i>O</i>-xylene and 15 for <i>M</i>-xylene and ethylbenzene, the highest values of specific network results are 2.656, 2.714, and 2.795 kW, respectively. For the working fluid <i>O</i>-xylene, the maximum energy efficiency value for 80% load conditions is 18.59% with a compression ratio of 17.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4372-4389"},"PeriodicalIF":2.6,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AI-Enhanced Design of Hexagonal Shell and Finned Tube Latent Heat Storage System Using Nonuniform Longitudinal Fins and Nanomaterials During Melting 基于非均匀纵翅片和纳米材料的六方壳翅片管潜热系统的ai强化设计

IF 2.6

Heat Transfer Pub Date : 2025-06-05 DOI: 10.1002/htj.23408

Pouyan Talebizadehsardari, Nashmi H. Alrasheedi, Hayder I. Mohammed, Khalil Hajlaoui, Nashwan Adnan Othman, Mohammad Edalatifar, Jana Shafi, Faisal Alresheedi

{"title":"AI-Enhanced Design of Hexagonal Shell and Finned Tube Latent Heat Storage System Using Nonuniform Longitudinal Fins and Nanomaterials During Melting","authors":"Pouyan Talebizadehsardari, Nashmi H. Alrasheedi, Hayder I. Mohammed, Khalil Hajlaoui, Nashwan Adnan Othman, Mohammad Edalatifar, Jana Shafi, Faisal Alresheedi","doi":"10.1002/htj.23408","DOIUrl":"https://doi.org/10.1002/htj.23408","url":null,"abstract":"<p>Thermal energy storage systems incorporating phase-change materials (PCMs) have difficulties associated with limited thermal conductivity, resulting in ineffective heat storage and retrieval. This study aims to enhance the efficiency of double-tube latent heat storage systems by utilizing a hexagonal shell augmented with irregular fins and nanomaterials. This study's innovation is optimizing the fin configuration and integrating nano-reinforced PCMs to enhance heat transmission during melting and solidification. The study initially examines the system's performance without reinforcement, demonstrating that traditional double-tube systems have superior storage rates. The impact of incorporating fins with an uneven angular distribution is examined, revealing that the 30°−35°−40°−45° design decreases the discharge time by 7.3% and enhances the energy storage rate by 6.0% relative to the normal 40° fins configuration. The outcomes state that the incorporation of 6% Al₂O₃ nanoparticles drops the charging time by 3.5% and enhances the heat storage rate by 22.5% relative to the 4% scenario. This study is significant as it introduces an innovative hexagonal shell design combined with nonuniform fins and nanomaterials to enhance the thermal performance of latent heat storage systems, addressing the critical challenge of low thermal conductivity in PCMs. The findings provide valuable insights for optimizing energy storage efficiency, which is essential for advancing renewable energy systems and sustainable thermal management solutions.</p>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4279-4298"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/htj.23408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boiler Corrosion in Thermal Power Plant: Kinetics and Mathematical Studies 火力发电厂锅炉腐蚀：动力学与数学研究

IF 2.6

Heat Transfer Pub Date : 2025-06-05 DOI: 10.1002/htj.23409

Cecelia Kh. Haweel, Janet Lazar Zozan, Anees A. Khadom, Khalid H. Rashid

{"title":"Boiler Corrosion in Thermal Power Plant: Kinetics and Mathematical Studies","authors":"Cecelia Kh. Haweel, Janet Lazar Zozan, Anees A. Khadom, Khalid H. Rashid","doi":"10.1002/htj.23409","DOIUrl":"https://doi.org/10.1002/htj.23409","url":null,"abstract":"<div>\u0000 \u0000 <p>The corrosion rate of boiler tubes is evaluated in terms of corrosive ion concentrations and temperature at a speed of rotation of 1500 rpm and a pressure of 27 bar. The mass loss method is used in the experimental work. The corrosion rate was seen to increase with both the concentration of corrosive species (Cl and Cu ions) and temperature. Values of activation energy were relatively high (14.07 kJ/mol) as the corrosive species concentration was low (0.5 ppm Cl<sup>−</sup> and 0.005 ppm Cu<sup>++</sup>). This value was reduced to 5.25 kJ/mol at a higher level of corrosive species concentration (100 ppm Cl<sup>−</sup> and 0.02 ppm Cu<sup>++</sup>). The suggested kinetic model showed an approximately zero-order reaction with respect to chloride and copper ion concentrations. Depending on mathematical principles, two models were suggested: the linear and polynomial models. Descriptive statistics outcomes showed that the polynomial model predicted data of the corrosion rate with a significant correlation coefficient (<i>R</i><sup>2</sup> = 0.9983). The novelty of the present work lies in the integration of statistical modeling techniques to estimate the corrosion behavior of waterside boiler tubes as a function of water chemistry.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4299-4307"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Transient Electroosmotic Flow of Magnetized Viscoplastic Fluid in a Rotating Microchannel 磁化粘塑性流体在旋转微通道中的瞬态电渗透流动研究

IF 2.6

Heat Transfer Pub Date : 2025-06-04 DOI: 10.1002/htj.23411

M. Y. Rafiq, Z. Abbas, Z. Shameem, A. Naeem

{"title":"Study of Transient Electroosmotic Flow of Magnetized Viscoplastic Fluid in a Rotating Microchannel","authors":"M. Y. Rafiq, Z. Abbas, Z. Shameem, A. Naeem","doi":"10.1002/htj.23411","DOIUrl":"https://doi.org/10.1002/htj.23411","url":null,"abstract":"<div>\u0000 \u0000 <p>Understanding electroosmotic flow within rotating microchannels holds significant potential for advancing biomedical technologies, particularly in the development of implants and diagnostic devices that manage biological fluid transport. Such understanding aids in applications like controlled drug delivery and fluid sampling for medical diagnostics. In this study, the transient electroosmotic rotational flow of an electrically conducting Casson fluid within a microchannel is analytically investigated using the Laplace transformation technique. The analysis employs the linear Debye–Hückel approximation to model electric potential behavior within the electrolyte. The governing ordinary differential equations describing the magnetohydrodynamic Casson fluid flow in a rotational frame are solved to obtain exact expressions for axial and transverse velocity components, electrostatic potential, and volumetric flow rate. Validation of the derived analytical solutions is conducted through comparison with existing literature, showing excellent agreement. Graphical analyses of parameter influences indicate that both axial and transverse velocities increase with stronger electroosmotic effects, while magnetic effects suppress the flow velocities. This study contributes valuable insights into microfluidic transport phenomena in non-Newtonian fluids under complex electric and magnetic environments, offering practical relevance for micro-electromechanical systems and lab-on-chip applications.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4322-4330"},"PeriodicalIF":2.6,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Performances of Internal Heat Generation and Quadratic Thermal Radiation Influences on Unsteady MHD Mixed Convective Flow About a Curved Stretching Surface Embedded in Porous Medium 多孔介质弯曲拉伸表面非定常MHD混合对流内部生热及二次热辐射影响的数值特性

IF 2.6

Heat Transfer Pub Date : 2025-06-03 DOI: 10.1002/htj.23410

Temjennaro Jamir, Boboi, Sabir Chetri, Akumlong Pongen

{"title":"Numerical Performances of Internal Heat Generation and Quadratic Thermal Radiation Influences on Unsteady MHD Mixed Convective Flow About a Curved Stretching Surface Embedded in Porous Medium","authors":"Temjennaro Jamir,  Boboi, Sabir Chetri, Akumlong Pongen","doi":"10.1002/htj.23410","DOIUrl":"https://doi.org/10.1002/htj.23410","url":null,"abstract":"<div>\u0000 \u0000 <p>Quadratic thermal radiation is a key concept in radiative heat transfer, concerning the interplay of thermal radiation. It involves a nonlinear relationship between temperature and radiative properties. While linear thermal radiation is common in various everyday applications, nonlinear thermal radiation is significant in certain situations, especially when a more accurate depiction of radiative heat transfer is necessary. The occurrence plays a vital role in scenarios requiring improved precision in modeling radiative heat transfer. This inquiry aims to analyze incompressible flow across a stretching curved surface affected by quadratic thermal radiation and internal heat generation subject to suction or injection. The governing system of nonlinear differential equations is transformed into a system of ordinary differential equations through the application of similarity transformations. This study offers results obtained using the <i>bvp4c</i> numerical scheme. The results indicate that the curvature constraint enhances the velocity and temperature profiles. Also, parameters such as the Prandtl number (+20.27%), quadratic radiation parameter (+14.72%), temperature ratio parameter (+18.35%), the presence of suction (+16.09%), and the unsteady parameter (+39.53%) act as crucial factors in enhancing the rate of cooling of the system; on the other hand, an enhanced heat generation leads to a reduced rate of cooling by 26.75%. The findings provide important insights that can enhance system efficiency across various applications, such as fluid mechanics and thermal management.</p>\u0000 </div>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 7","pages":"4308-4321"},"PeriodicalIF":2.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0