Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering最新文献

{"title":"Exploring the post-heat treatment on the electropolishing characteristics of laser powder bed fusion processed Inconel 718 superalloy","authors":"Abhishek Shrivastava, S Anand Kumar, Samrat Rao","doi":"10.1177/09544089241263144","DOIUrl":"https://doi.org/10.1177/09544089241263144","url":null,"abstract":"The influence of post-heat treatment on the microstructural and electropolishing characteristics of the laser powder bed fusion processed Inconel 718 is studied. The electropolishing results show a significant decrease in the surface roughness for as-printed (∼69%) and post-heat treatment conditions (∼74%) with increasing current density and polishing time. The surface morphology of the as-printed samples showed the presence of unaltered asperities on the electropolished surface, which can be attributed to the precipitation of non-conductive lave phases and metal carbides during laser powder bed fusion processing. The post-heat treatment homogenizes microstructure and dissolves these phases in the metal matrix along with the precipitation of strengthening phases. As a result, the surface morphology of post-heat treatment samples becomes more uniform, signifying fewer surface irregularities. The statistical parameters show a significant reduction in sharp asperities in the post-heat treatment condition. The material ratio curves revealed uniform material distribution in the post-heat treatment samples, signifying reduced surface asperities compared to as-printed conditions.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783923","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}

{"title":"Influence of the position and dimensions of a U-shaped obstacle in a cavity containing a nanofluid on the thermal performances","authors":"Chadi Kamel, Belghar Nourredine, Lachi Mohammed, Driss Zied, Azzouz El amin","doi":"10.1177/09544089241263706","DOIUrl":"https://doi.org/10.1177/09544089241263706","url":null,"abstract":"The aim of this work is to study the effect of the position of an obstacle in the U-shaped with length l<jats:sub>r </jats:sub>= 0.6 H and height h<jats:sub>r </jats:sub>= 0.4 H, thickness w<jats:sub>r </jats:sub>= 0.2 H located inside a square cavity of two-dimensional length L and height H filled with a diamond–water nanofluid (solid volume fraction in the range of 0.05). The bottom wall of the cavity is brought to a constant hot temperature ( T<jats:sub>h</jats:sub>). The two side walls are cooled to a constant temperature T<jats:sub>f</jats:sub>, and the upper wall of the cavity is adiabatic. The position of the obstacle in relation to the hot wall was studied in four cases: in the first case, the obstacle is placed on the vertical left side wall, the obstacle is placed on the upper in case 2, (against a hot wall), the obstacle is placed on the vertical right side wall in the case three, and the fourth case the obstacle is placed on the hot wall. The effect of the obstacle dimensions, such as its thickness, length, and width in the fourth case, on heat exchange inside the cavity was also studied. Numerical results were developed for Rayleigh numbers equal to 10<jats:sup>3</jats:sup> and 10<jats:sup>5</jats:sup> for the laminar and steady flow regime. According to the results obtained from the study, the effect of increasing the Rayleigh number on the heat transfer coefficient was observed in the four cases. We found that the position of the obstacle in the fourth case gives the best heat exchange compared to the cases studied, with a difference of 8.8%, 11%, and 8.9% for the first case, the second case, and the third case, respectively. We also noticed that an increase in the thickness, length, and height of the obstacle affects the heat exchange in the fourth case.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783919","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}

{"title":"A finite difference approach for analysis of entropy generation and stream surface on nonlinear convective magnetohydrodynamic flow over an oscillating surface","authors":"Gopal Chandra Hazarika, Utpal Jyoti Das, Indushri Patgiri, Jubi Begum","doi":"10.1177/09544089241266423","DOIUrl":"https://doi.org/10.1177/09544089241266423","url":null,"abstract":"Magnetohydrodynamic (MHD) flow for nonlinear convective fluids with heat source, viscous dissipation, and heat radiation play such vital role in various engineering and applied problems. The present study concerned about entropy generation and stream surface on MHD nonlinear convective flow over an oscillating surface. Both heat source and nonlinear form of heat radiation are taken into account for their respective effects. Moreover, this study assumes a uniformly sized magnetic field that acts normal to the fluid flow. Through proper similarity transformations, leading nonlinear partial differential equations (PDEs) can be reduced to non-dimensional form. To solve these nonlinear PDEs numerically, finite difference method was employed. This study aims to find out the behavior of stream surface, entropy generation, Bejan number, temperature, and velocity for numerous physical factors as well. Observation highlights that the magnetic parameter reduces fluid velocity, and rate of heat transfer, though enhances entropy generation and shear stress. Grashof number lowers heat transport rate and share stress despite improving fluid velocity and stream surface. The application of electromagnetic field reflects stream surface to be decreased. The fluid temperature rises in response to Eckert number and heat source. Brinkman number amplifies both Bejan number and entropy generation.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783979","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}

{"title":"An experimental investigation of single- and two-phase flow in copper and aluminum microchannel heat sinks","authors":"Zeynep Küçükakça Meral, Umut Küçükoğlu, Zekeriya Parlak, Nezaket Parlak","doi":"10.1177/09544089241262957","DOIUrl":"https://doi.org/10.1177/09544089241262957","url":null,"abstract":"In this study, single- and two-phase flow and heat transfer characteristics in copper and aluminum heat sinks were investigated experimentally. Deionized water was used as the working fluid in the experiments. Two-phase flow tests were performed at low vapor qualities (∼0.1). Each heat sink has a square shape of 20 mm × 20 mm. Heat sinks have 15 parallel microchannels. The hydraulic diameters of the channels range from 400 to 500μm, and their aspect ratios range from 0.4 to 2.5. The effects of material and aspect ratio on two-phase flow were studied. Experimental Nu values for single-phase flow were found to vary with an increasing trend between 4.6 and 7.2 values. The data overlap with the data obtained from the Sieder-Tate correlation for Re &gt; 280. For Re &lt; 280, the difference reaches 25%. The pressure drop in two-phase flow is 2.5 times higher than that measured in single-phase flow. The heat transfer coefficients of two-phase flow decreased with increasing the degree of vapor quality and increased with increasing mass flow rate. Heat transfer coefficients were found to be higher for 2.5 aspect ratio than coolers with similar hydraulic diameters. Additionally, the heat transfer coefficients of the copper heatsink were higher than those of aluminum.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783920","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}

{"title":"Strengthened elitist genetic algorithm for aeroengine blade arrangement optimisation","authors":"Wuguo Wei, Chao Wu, Junjie Zhang","doi":"10.1177/09544089241262965","DOIUrl":"https://doi.org/10.1177/09544089241262965","url":null,"abstract":"Variations in mass moment of aeroengine blades can cause different residual unbalances, leading to exceeding vibration limit values. For this reason, an accurate and rapid selection of a suitable blade arrangement is essential for improving assembly quality and efficiency. This work innovatively applies the strengthened elitist genetic algorithm (SEGA) to the optimization of blade arrangement for aeroengine. This work investigates the effects of population size (Ps: 100–500), population crossover probability (Pc: 0.6–0.9), and population mutation probability (Pm: 0.6–0.9) on the convergence speed and accuracy of the algorithm, respectively. The obtained results indicate that the optimal parameters of the algorithm are 300 for Ps, 0.7 for Pc, and 0.9 for Pm, which can quickly search for high-precision solution. Compared to the elitist genetic algorithm (EGA), the accuracy value of SEGA is improved about 82%. In addition, this work conducted simulated vibration platform to verify SEGA, and the obtained results show that the vibration values are reduced by 4.19%, 10.19%, and 2.99% at stable speeds of 1000, 1500, and 2000 rpm, respectively, compared to that of group sorting. This work employs a novel SEGA that can effectively improve the accuracy value and reduce vibration values compared to EGA and group sorting, respectively. The above may reduce the residual unbalances of the aeroengine, improve the quality of assembly, and provide a new idea for the assembly of blades.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783922","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}

{"title":"Mechanical characteristics of optimized alkali-treated Similax Zelanica/glass fiber/nanosilica composites in an epoxy matrix: An experimental investigation and numerical study","authors":"E Sivakumar, K K Saju","doi":"10.1177/09544089241264180","DOIUrl":"https://doi.org/10.1177/09544089241264180","url":null,"abstract":"The demand for environmentally conscious materials has led the research on natural fiber composites as an alternative to synthetic materials in various industries. This study focuses on the optimization and preparation of alkali-treated Similax Zelanica/glass fiber and nanosilica-reinforced epoxy composites. The weight % of Similax Zelanica/glass and nanosilica was optimized using the grey relational analysis (GRA) multiparameter optimization technique and DOE of L9 orthogonal was used. Mechanical properties including tensile, flexural, impact, rock well hardness, and dynamic mechanical analysis were evaluated. Results indicate that increasing fiber volume fraction up to 30% enhances mechanical properties, with subsequent declines beyond this threshold. Tensile strength peaked at 30% fiber volume (75 MPa), while flexural strength also peaked at 30% substrate (140 MPa). The impact test showed a maximum of 1.84 kJ/m<jats:sup>2</jats:sup> at 30% volume fraction. Maximum hardness of 85 RHN is observed for 30% S and 60% E specimens. Weibull distribution plots results, aligned well with the expected distribution pattern, indicating consistent and reliable mechanical behavior. Water absorption rates increase with fiber volume percentage increase, but optimal alkali treatment improves, absorption resistance to some extent. Dynamic mechanical analysis reveals reduced glass transition temperature Tg (97° C) for composite due to their better interaction nature between fiber/silica nanoparticles and matrix. Further characterization reveals thermal stability (374°C), crystalline properties (crystalline index: 56.87%, crystalline size: 21.23 nm), and functional group composition. Numerical analysis using ANSYS validates experimental results, giving confidence in repeatability. Scanning electron microscope analysis confirms good interfacial bonding, crack propagation details, and absence of impurities in the composite. These results like Mechanical properties, thermal stability, crystalline properties, and functional group composition of the composite confirm its suitability for various applications.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783981","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}

{"title":"Magnetic field, radiation, and Joule heating effects on natural convection Williamson fluid flow through a vertical channel using Levenberg–Marquardt algorithm","authors":"Subham Jangid, Kaladhar Kolla","doi":"10.1177/09544089241264088","DOIUrl":"https://doi.org/10.1177/09544089241264088","url":null,"abstract":"The study examined the natural convection flow of Williamson fluid through a vertical channel under the influence of the magnetic field, radiation, and joule heating effects. The governing partial differential equations are turned into ordinary differential equations using suitable transformations and solved by using the spectral quasi-linearization method (SQLM). The study explained a neural network algorithm called feed-forward back-propagation using the Levenberg–Marquardt technique (BPFF-LMT). Furthermore, a reference dataset is created for several parameters, including the magnetic parameter, Hall parameter, radiation parameter, Weissenberg number, Biot number, and Joule heating parameter. This dataset encompasses velocity and temperature profiles for different scenarios, employing the SQLM. The BPFF-LMT method’s accuracy was evaluated through a comprehensive analysis involving training, validation, and testing phases, along with mean squared error, error histograms, and performance and regression graphs. The artificial neural network’s result shows good accuracy when compared to the SQLM solution numerically. The results are presented visually through graphical representation and further analyzed quantitatively concerning the active parameters featured in the mathematical formulations. The result indicates that increasing values of the magnetic parameter result in decreased velocity and temperature profiles. Additionally, the heat transfer rate increases in the left channel. Both the radiation parameter and Weissenberg number contribute to higher velocity and temperature profiles, leading to increased skin friction in the left channel. The accuracy of the BPFF-LMT method is illustrated through graphs displaying the absolute error falling within the range of [Formula: see text] to [Formula: see text].","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783983","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}

{"title":"Thermal efficiency evaluation in shell-and-tube heat exchangers: A CFD-based parametric study","authors":"Yasin Furkan Gorgulu","doi":"10.1177/09544089241262481","DOIUrl":"https://doi.org/10.1177/09544089241262481","url":null,"abstract":"In this study, a novel approach was employed to enhance the performance of a Bowman brand EC-2028 shell-and-tube heat exchanger (STHE) by introducing perforated plates. The heat exchanger was first tested in a real system within a laboratory environment to establish baseline performance data. Computational fluid dynamics (CFD) analysis revealed that flow velocities in the middle tubes were higher due to their alignment with the main flow direction, resulting in decreased heat transfer efficiency. To address this issue, a perforated plate with concentric circles was introduced at the cold fluid entry. This plate, devoid of central holes, featured circles with radii of 9, 18, 27, 36, 45, 54, and 63 mm, each containing 6, 10, 17, 24, 30, 36, and 42 equidistant holes, respectively. The introduction of the perforated plate led to a decrease of approximately 0.33°C in the hot outlet temperatures, indicating an improvement in heat transfer efficiency. To further enhance performance, various configurations were tested by progressively closing holes from the innermost to the outermost circles. Eight different configurations, including the control, were evaluated under counterflow conditions. The CFD model was validated with experimental data before introducing the perforated plates, ensuring the accuracy of the simulations. The findings demonstrated significant improvements in heat transfer efficiency, with the optimized perforated plate configurations leading to more uniform flow distribution and reduced pressure drops. This study's novel approach of using perforated plates to modulate flow and enhance thermal performance highlights a new avenue for optimizing STHE designs, contributing to more efficient thermal management solutions in industrial processes.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783982","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}

{"title":"Numerical study of electroconductive non-Newtonian hybrid nanofluid flow from a stretching rotating disk with a Cattaneo–Christov heat flux model","authors":"M. Shamshuddin, S. Salawu, O. Anwar Bég, Usman, T. Bég, S. Kuharat","doi":"10.1177/09544089241258019","DOIUrl":"https://doi.org/10.1177/09544089241258019","url":null,"abstract":"Motivated by emerging technologies in smart functional nanopolymeric coating systems in pharmaceutical and robotics applications, the convective heat transfer characteristics in swirl coating with a magnetic hybrid power-law rheological nanofluid polymer on a radially stretching rotating disk are examined theoretically. An axial magnetic field is imposed. Copper (Cu) and aluminium alloy (AA7075) nanoparticles with sodium alginate (C6H9NaO7) as a base fluid are considered, and a hybrid volume fraction model is deployed. A non-Fourier (Cattaneo–Christov) heat flux model is deployed to inspire thermal relaxation impacts absent in the classical Fourier heat conduction formulation. Through similarity proxies and the Von Karman transformations, the partial derivative systems of equations with associated boundary constraints are reduced to a system of derivative boundary value problems, which is solved numerically via the weighted residual method with an integral Galerkin scheme, executed in the MAPLE symbolic software. Validation with special cases from articles is captured. The computations revealed that radial, tangential and axial velocity are depleted, whereas temperature is enhanced with increasing magnetic parameter ( M). High thermal transfers are obtained for the hybrid nanofluid relative to the AA7075 alloy nanofluid. A strong increment in temperature is also produced with a greater thermal relaxation effect.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272254","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}

{"title":"Scanning electron microscopy (SEM)-assisted mechanistic study: pH-driven compressive strength and setting time behavior in geopolymer concrete","authors":"Md. Zia Ul Haq, Hemant Sood, Rajesh Kumar","doi":"10.1177/09544089241259460","DOIUrl":"https://doi.org/10.1177/09544089241259460","url":null,"abstract":"This research study investigates the influence of pH on the setting time, compressive strength (CS), and surface roughness of different waste materials, namely fly ash, rice husk ash (RHA), red mud, and ground granulated blast furnace slag (GGBS). The average pH values for these waste materials were found to be 8.77, 9.3, 8.3, and 11, respectively. The initial setting time (IST) and final setting time (FST) varied among the materials, with red mud having maximum IST and FST with a value of 180 min and 24 h. CS (MPa) measurements revealed that GGBS exhibited the highest value of 36 MPa, followed by RHA (28 MPa), red mud (22 MPa), and fly ash (24 MPa). Surface roughness analysis showed that red mud had the highest roughness value of 69.71, followed by fly ash (62.81), RHA (53.14), and GGBS (49.08). The findings indicate a positive correlation between pH levels and CS of 97%, and setting time surface roughness has a negative correlation with CS when analyzed with a heatmap. Higher pH values were associated with increased CS, particularly after 28 days of curing which is shown by the heatmap and sub-plots. Additionally, microscopic analysis provided insights into particle size, orientation, and clustering, aiding in understanding the bonding and reactivity patterns contributing to the observed variations in CS.","PeriodicalId":20552,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268740","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}