International Journal of Thermofluids最新文献

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Thermal and Flow Dynamics of Magnetohydrodynamic Burgers' Fluid Induced by a Stretching Cylinder with Internal Heat Generation and Absorption
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.100986
Fateh Mebarek-Oudina , G. Dharmaiah , J.L. Rama Prasad , H. Vaidya , Manda Aruna Kumari
{"title":"Thermal and Flow Dynamics of Magnetohydrodynamic Burgers' Fluid Induced by a Stretching Cylinder with Internal Heat Generation and Absorption","authors":"Fateh Mebarek-Oudina ,&nbsp;G. Dharmaiah ,&nbsp;J.L. Rama Prasad ,&nbsp;H. Vaidya ,&nbsp;Manda Aruna Kumari","doi":"10.1016/j.ijft.2024.100986","DOIUrl":"10.1016/j.ijft.2024.100986","url":null,"abstract":"<div><div>This study investigates the flow dynamics of magnetohydrodynamic Burgers' fluid induced by a stretching cylinder, emphasizing the effects of internal heat generation and absorption. A temperature-dependent heat source is integrated to examine the characteristics of thermal energy transfer within the system. By applying boundary layer theory, we transform the governing partial differential equations into a standard system of ordinary differential equations through similarity transformations. The BVP4C method is utilized to accurately solve the resulting equations for velocity and temperature profiles. Graphical representations illustrate the influence of various physical parameters on both thermal and flow profiles, supported by comprehensive analytical interpretations. To validate our findings, a comparison with existing literature is performed, confirming the consistency and significance of our results. This research offers valuable insights into the thermal and fluid behaviors of Burgers' fluids, with promising applications in the development of advanced biomedical devices.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 100986"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161001","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
Optimization using response surface methodology for Eyring-powell fluid flow with Cattaneo-Christov heat flux and cross diffusion effects
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.100981
Pradeep Kumar , Vidhya K G , Felicita Almeida , Qasem Al-Mdallal
{"title":"Optimization using response surface methodology for Eyring-powell fluid flow with Cattaneo-Christov heat flux and cross diffusion effects","authors":"Pradeep Kumar ,&nbsp;Vidhya K G ,&nbsp;Felicita Almeida ,&nbsp;Qasem Al-Mdallal","doi":"10.1016/j.ijft.2024.100981","DOIUrl":"10.1016/j.ijft.2024.100981","url":null,"abstract":"<div><div>The optimization of heat transfer in engineering applications has significant implications for product performance and efficiency. This study investigates the flow and heat transfer characteristics of Eyring-Powell fluid over a curved sheet, incorporating complex phenomena such as magnetic dipoles, Cattaneo-Christov heat flux, and cross-diffusion effects. Navier's slip and melting boundary conditions are applied to model realistic physical constraints. The study employs response surface methodology (RSM) and sensitivity analysis to evaluate the parametric influences on skin friction and the Nusselt number, providing statistical insights into their behavior. Using similarity transformations, the governing partial differential equations are converted into ordinary differential equations, which are numerically solved using the Runge-Kutta-Fehlberg 4th-5th order method. Key findings include the reduction in velocity due to higher Eyring-Powell parameters, ferrohydrodynamic interactions, and slip effects. Similarly, increased melting and ferrohydrodynamic interactions lower the fluid temperature, while the Dufour number enhances it. The concentration is positively influenced by higher Soret numbers. Statistical results demonstrate a perfect fit with a squared-R coefficient of 100 %, and the Pareto chart identifies critical points at 2 for skin friction and the Nusselt number. Sensitivity analysis reveals negative sensitivity for most parameters across ferrohydrodynamic interaction levels, except for the Prandtl number, which exhibits positive sensitivity at low and medium Eyring-Powell parameter levels but turns negative at higher levels. This work provides a robust framework for understanding and optimizing the thermofluidic behavior of non-Newtonian fluids under complex physical conditions, offering valuable insights for industrial applications.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 100981"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161009","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
The performance of cylindrical solar still with hemispherical dome using circular fins in basin
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101026
Shahzanan Falah, Dhafer Manea Hachim, Wisam A. Abd Al-wahid
{"title":"The performance of cylindrical solar still with hemispherical dome using circular fins in basin","authors":"Shahzanan Falah,&nbsp;Dhafer Manea Hachim,&nbsp;Wisam A. Abd Al-wahid","doi":"10.1016/j.ijft.2024.101026","DOIUrl":"10.1016/j.ijft.2024.101026","url":null,"abstract":"<div><div>As freshwater becomes depleted in many regions around the world and the need to use brackish water increases, the importance of solar resources (which are environmentally sustainable and economically viable) continues to increase. This study was designed to assess the efficiency of a modified cylindrical solar still which was outfitted with a hemispherical dome and fins. The evaluation was conducted theoretically and experimentally in Najaf, Iraq (at the geographical coordinates of 31.590°N and 44.190°E). The research methodology involved the numerical testing of seven proposed models and the identification of the optimal variables for the solar still's performance. This study conducted experimental tests on the best-performing models from the numerical simulation. During these tests, the daily production of distilled water from the still ranged from 2.72 to 3.7 kg/m². The experimental results closely correlate with the results obtained from the numerical simulations of a stagnant system (with and without fins). In the numerical simulation study, the results demonstrated that the addition of fins to the solar still increases the surface area of the tank which resulted in a peak throughput of 11.853 kg/m². The highest total productivity achieved for January, March, July, and October are 3.011 kg/m², 7.686 kg/m², 11.853 kg/m², and 4.279 kg/m², respectively. The results demonstrated a significant improvement in the efficiency of the distillation device which exceeded 64.7 % when compared to the finless model. The finned model has the advantage of increased productivity and ease of manufacture. The most efficient arrangement and cumulative productivity of this improvement was achieved via the use of five fins (each of which measures 8 mm in height) arranged at a fixed height in the cylinder.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101026"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161519","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
Enhanced thermal efficiency on mixed convection flow of TiO2 – Water nanofluid inside a double lid driven zigzag cavity with and without heated obstacles insertion
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101040
Md. Aslam Hossain , M. A. H. Sajib , Md. Sagib , Md. Rafiqul Islam , Goutam Barai , Chinmayee Podder , Bijan Krishna Saha
{"title":"Enhanced thermal efficiency on mixed convection flow of TiO2 – Water nanofluid inside a double lid driven zigzag cavity with and without heated obstacles insertion","authors":"Md. Aslam Hossain ,&nbsp;M. A. H. Sajib ,&nbsp;Md. Sagib ,&nbsp;Md. Rafiqul Islam ,&nbsp;Goutam Barai ,&nbsp;Chinmayee Podder ,&nbsp;Bijan Krishna Saha","doi":"10.1016/j.ijft.2024.101040","DOIUrl":"10.1016/j.ijft.2024.101040","url":null,"abstract":"<div><div>This paper represents the enhancement of thermal efficiency on mixed convection flow of <em>TiO</em><sub>2</sub> – water nanofluid inside a double lid driven zigzag cavity using Galerkin's weighted residual-based finite element techniques implemented in COMSOL Multiphysics 6.2. To ensure the reliability of the obtained results, extensive comparisons and validations are conducted against relevant literatures. The flow is considered to be incompressible, laminar and steady. The top and bottom wall of the cavity are moving in the same direction with a constant velocity and the remaining walls are in no slip condition. The left vertical wall of the cavity is heated uniformly while the right vertical wall is cooled. The other walls of the cavity are well insulated. The investigation includes pertinent parametric effects of Rayleigh number(<em>Ra</em>), Reynolds number(<em>Re</em>), Richardson number(<em>Ri</em>) and nano-particles volume fraction(φ) and the range of the parameters are taken as 10<sup>2</sup> ≤ <em>Ra</em> ≤ 10<sup>6</sup>, 5 ≤ <em>Re</em> ≤ 400, 0.1 ≤ <em>Ri</em> ≤ 10, and 0 ≤ φ ≤ 0.05. The velocity profiles together with temperature distributions are represented in the forms of stream functions and isotherm contours respectively whereas the heat transfer rate is calculated in terms of Nusselt number. Moreover, this study is investigated the impacts of the parameters on stream functions, isotherm contours and heat exchange inside a double lid driven cavity with and without heated circular obstacles. This analysis demonstrates that an increase in nanoparticle volume fraction enhances the heat transfer (HT) rate, with Reynolds and Richardson numbers playing a significant role in optimizing heat transfer performance within the cavity. The average Nusselt number of the cavity with circular obstacles insertion becomes almost double than the cavity without circular obstacles, in of case φ = 0.00. As φ increases, the concentration of nanoparticles increases, leading to enhanced thermal conductivity of the cavity. For a Reynolds number <em>Re</em>= 200 and φ = 0.05, the presence of heated obstacles increases the average Nusselt number by approximately 66.29 % compared to the case without obstacles. Similarly, at <em>Re</em> = 400 and φ = 0.05, the inclusion of an obstacle enclosure improves the overall thermal efficiency of the system by approximately 60.4 % compared to the absence of the obstacles.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101040"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161886","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
Optimization of thermo-hydraulic performance in partially copper-foam-filled rectangular channels: Experimental insights on foam layer configurations
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101032
Kadhim Al-Chlaihawi , Moayed Hasan , Ali Ekaid
{"title":"Optimization of thermo-hydraulic performance in partially copper-foam-filled rectangular channels: Experimental insights on foam layer configurations","authors":"Kadhim Al-Chlaihawi ,&nbsp;Moayed Hasan ,&nbsp;Ali Ekaid","doi":"10.1016/j.ijft.2024.101032","DOIUrl":"10.1016/j.ijft.2024.101032","url":null,"abstract":"<div><div>This study presents experimental observations of the heat transfer coefficient and pressure drop undergoing turbulent air flow through a copper metallic foam sample with a porosity of 0.9 and a pore density of 10 PPI, arranged in five distinct configurations within a rectangular channel. The experiments were performed within a hydraulic diameter-based Reynolds number range of 4000 to 16,000, which corresponds to an air frontal velocity range of 2.5 to 5 m/s. The average Nusselt number (<em>Nu</em>), friction factor (<em>f</em>), permeability, inertia coefficient, and thermal-hydraulic enhancement factor were found by analyzing the collected data of heat transfer and pressure drop. The results indicated that the inclusion of metal foam resulted in a 4.8 to 10.5 fold increase in <em>Nu</em> and approximately 12.6 to 60.4 fold increase in friction factor compared to the empty channel. The backward-facing chamfered foam block exhibited the highest thermo-hydraulic enhancement factor, reaching approximately 2.94 at a Reynolds number of 16,000.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101032"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161888","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
Precision optimization of reactive squeezing flow in stratified fluids: A response surface exploration
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101027
Anum Shafiq , Tabassum Naz Sindhu , Muhammad Ahmad Iqbal
{"title":"Precision optimization of reactive squeezing flow in stratified fluids: A response surface exploration","authors":"Anum Shafiq ,&nbsp;Tabassum Naz Sindhu ,&nbsp;Muhammad Ahmad Iqbal","doi":"10.1016/j.ijft.2024.101027","DOIUrl":"10.1016/j.ijft.2024.101027","url":null,"abstract":"<div><div>Chemically reactive squeezing flows play a crucial role in various industrial and engineering processes, such as in polymer manufacturing, chemical reactors, and biofluid mechanics, where precise control over fluid behavior is essential for optimizing product quality and efficiency. Current study has focused on the chemically reactive squeezing fluid flow through a non-Darcy medium due to a stretching surface, employing response surface methodology. This research investigates the heat and mass transfer processes under convective conditions and non-linear stratification, with an emphasis on enhancing heat transfer through the incorporation of radiation effects. The non-linear governing system is solved numerically using the Runge–Kutta fourth-order method (RK-4) combined with the shooting technique. Critical parameter variations are illustrated through graphical representations, highlighting their impact on the relevant fields. The Nusselt number, Sherwood number, and skin friction coefficient are computed numerically for various parameter settings. Additionally, a comprehensive statistical analysis is conducted, utilizing the correlation coefficient and probable error to assess the influence of governing input variables on the output parameters of interest. The study also includes a sensitivity analysis, revealing that the sensitivities of the heat transport rate to the radiation parameter and thermal stratification parameter increase with higher Biot numbers. The high <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> and <span><math><mrow><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>−</mo></mrow></math></span>adj values, being close to unity, indicate that the proposed model demonstrates a robust empirical relationship between the responses and independent factors for both local Nusselt and Sherwood numbers.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101027"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161889","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
Machine learning-driven analysis of heat transfer in chemically reactive fluid flow considering Soret-Dufour effects
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.100982
Shazia Habib , Saleem Nasir , Zeeshan Khan , Abdallah S. Berrouk , Waseem , Saeed Islam
{"title":"Machine learning-driven analysis of heat transfer in chemically reactive fluid flow considering Soret-Dufour effects","authors":"Shazia Habib ,&nbsp;Saleem Nasir ,&nbsp;Zeeshan Khan ,&nbsp;Abdallah S. Berrouk ,&nbsp;Waseem ,&nbsp;Saeed Islam","doi":"10.1016/j.ijft.2024.100982","DOIUrl":"10.1016/j.ijft.2024.100982","url":null,"abstract":"<div><h3>Objective</h3><div>The study investigates tangent hyperbolic nanofluid flow across an extended media, emphasizing magnetohydrodynamic influences, mixed convection, and nanoparticle transport with the help of an innovative and advanced technique.</div></div><div><h3>Methodology</h3><div>It employs a sophisticated Gaussian Neural Network and Hybrid Cuckoo Search to mimic complex fluid dynamics accurately, ensuring efficient computation and solution precision. By transforming the governing system of nonlinear partial differential equations into ordinary differential equations via similarity transformation, the methodology attains computational efficiency and solution precision.</div></div><div><h3>Core Findings</h3><div>Statistical measures confirm the model's resilience, indicating absolute error variations from <em>E</em><sup>−05</sup> to <em>E</em><sup>−12</sup> and mean squared errors continuously between <em>E</em><sup>−02</sup> − <em>E</em><sup>−07</sup>, highlighting the reliability of the model, while the Error in Nash-Sutcliffe Efficiency values fall within the interval <em>E</em><sup>−05</sup> − <em>E</em><sup>−15</sup>. The Theil's Inequality Coefficient values lie in the range of <em>E</em><sup>−01</sup> − 10<sup>−07</sup>.</div></div><div><h3>Future Direction and Applications</h3><div>The findings underscore the model's capacity to improve thermal management, energy efficiency, and process dependability in sectors like chemical processing, environmental engineering, and sustainable energy production. This study positions the Gaussian Neural Networks framework as a robust computational instrument, providing a foundation for subsequent investigations into intricate geometries, multi-physics phenomena, and magnetohydrodynamic systems for novel technology applications.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 100982"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161011","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
The significance of magnetized thermal radiation on the magnetohydrodynamic (MHD) behavior of Williamson hybrid ferrofluids over a stretching sheet
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.100997
D. Thenmozhi , M. Eswara Rao , P.D. Selvi , RLV. Renuka Devi , S. Kiranmaiye , Ch. Nagalakshmi
{"title":"The significance of magnetized thermal radiation on the magnetohydrodynamic (MHD) behavior of Williamson hybrid ferrofluids over a stretching sheet","authors":"D. Thenmozhi ,&nbsp;M. Eswara Rao ,&nbsp;P.D. Selvi ,&nbsp;RLV. Renuka Devi ,&nbsp;S. Kiranmaiye ,&nbsp;Ch. Nagalakshmi","doi":"10.1016/j.ijft.2024.100997","DOIUrl":"10.1016/j.ijft.2024.100997","url":null,"abstract":"<div><div>The goal of this study is to investigate the fluid dynamics of a pseudoplastic Williamson nanofluid model, explicitly focusing on blood infused with magnetite (Fe<sub>2</sub>O<sub>3</sub>) and (Cu) copper nanoparticles, with the aim of enhancing its physiological and industrial applications. This research offers a novel approach by integrating the Williamson fluid model with magnetic nanoparticles, which has not been widely explored in biomedical applications like antitumor therapy and magnetic hyperthermia. The study is mathematically modeled using partial differential equations (PDEs) accounting for the deformation vortices of a stretching surface. These governing equations are transformed into ordinary differential equations (ODEs) via similarity transformations and solved numerically using the Runge-Kutta (R-K) 4th-order method coupled with the shooting technique. The velocity and temperature fields are then analyzed through MATLAB simulations. Results indicate that increasing the Williamson, radiation, and nanoparticle volume fraction parameters elevates the fluid temperature, whereas higher magnetic field strength, Prandtl number, and stretching parameter values reduce it. The novelty of this work lies in its application of the Williamson nanofluid model to real-time medical applications, such as cancer treatment through magnetic hyperthermia, and its potential use in advanced biomedical devices.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 100997"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161013","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
Principal difficulties with parabolic trough collector systems and performance-boosting strategies: A comprehensive review
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101009
Umamaheshwar Hebbal , Bhimasen Soragaon , G. Rathnakar , A.N. Mohan Das , L.R. Thippeswamy , N. Nagabhushana , C. Durga Prasad , Adem Abdirkadir Aden
{"title":"Principal difficulties with parabolic trough collector systems and performance-boosting strategies: A comprehensive review","authors":"Umamaheshwar Hebbal ,&nbsp;Bhimasen Soragaon ,&nbsp;G. Rathnakar ,&nbsp;A.N. Mohan Das ,&nbsp;L.R. Thippeswamy ,&nbsp;N. Nagabhushana ,&nbsp;C. Durga Prasad ,&nbsp;Adem Abdirkadir Aden","doi":"10.1016/j.ijft.2024.101009","DOIUrl":"10.1016/j.ijft.2024.101009","url":null,"abstract":"<div><div>Solar energy has become one of the prominent sources of renewable energy in recent decades. The major factors that make solar energy; the default renewable energy source are its universal availability at large, free of cost, environmental friendliness, sustainability, and other advantages. The temperature range of the parabolic trough collector varies up to 400 °C. This makes the collector most suitable in the concentrated solar power generation category. This review paper mainly discusses the challenges faced by the PTC systems and their mitigation for performance enhancement. Furthermore, the current review paper also outlines the research conducted by various scholars on the parabolic trough collector performance enhancement through inserts/turbulators, and the effect of rotation of the tube on the collector performance. At last, a summary of all the literature concerning different inserts is included. It is discovered that the collector's thermal efficiency will rise with the tube's rotation, but this is dependent on several other variables, including the collector's optical characteristics, tracking errors, and the type of heat transfer fluid used, among others. This review paper is poised to be a valuable resource for researchers with a vested interest in systems based on parabolic trough solar collectors.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101009"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161073","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
Exploring natural convection and heat transfer dynamics of Al2O3-H2O nanofluid in a modified tooth-shaped cavity configuration
International Journal of Thermofluids Pub Date : 2025-01-01 DOI: 10.1016/j.ijft.2024.101005
Bijan Krishna Saha , Jahidul Islam Jihan , Goutam Barai , Nur Jahangir Moon , Goutam Saha , Suvash C. Saha
{"title":"Exploring natural convection and heat transfer dynamics of Al2O3-H2O nanofluid in a modified tooth-shaped cavity configuration","authors":"Bijan Krishna Saha ,&nbsp;Jahidul Islam Jihan ,&nbsp;Goutam Barai ,&nbsp;Nur Jahangir Moon ,&nbsp;Goutam Saha ,&nbsp;Suvash C. Saha","doi":"10.1016/j.ijft.2024.101005","DOIUrl":"10.1016/j.ijft.2024.101005","url":null,"abstract":"<div><div><em>Background:</em> Heat transfer (HT) is crucial in engineering, particularly for thermal management systems, where elements like a heated rectangular wall, an adiabatic circular cylinder, and nanofluids introduce complexity and improvements. Additionally, exploring the impact of magnetic forces on natural convection (NC) is important in various industrial processes.</div><div><em>Aims:</em> The purpose of the study is to examine how different factors influence HT and fluid flow within the cavity. This includes examining the roles of the heated rectangular vertical wall (RVW), the adiabatic circular cylinder, and the magnetic force on the NC of Al<sub>2</sub>O<sub>3<img></sub>H<sub>2</sub>O nanofluid.</div><div><em>Method and validations:</em> This study solves the governing equations and corresponding boundary conditions using Galerkin's weighted residual-based finite element methods. Also, comprehensive comparisons and validations against existing results are conducted to ensure the accuracy of the findings.</div><div><em>Parameters:</em> The study involves a range of parameter values, including 0 ≤ nanoparticle volume fraction (φ) ≤ 5 %, 10<sup>4</sup> ≤ Rayleigh number (<em>Ra</em>) ≤ 10<sup>6</sup>, 0 ≤ Hartmann number (<em>Ha</em>) ≤ 60.</div><div><em>Results:</em> The research reveals that insulated wavy top wall and heated RVW significantly shape the flow field and heat transport. The presence of the adiabatic cylinder further enhances this phenomenon. Incorporating Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O nanofluid enhances HT performance, especially at larger φ.</div><div><em>Conclusion: T</em>he study concludes that the innovative design approach involving the wavy top wall, heated RVW, and adiabatic circular cylinder significantly influences the heat transfer and flow field within the cavity. This design effectively mitigates external heat loss, demonstrating its potential for improved thermal management systems.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101005"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161075","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
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