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Investigating multi-directional flow dynamics in three-way ball valves: a CFD-based study

Journal of engineering and Applied Science 2025年第1期72卷 1-14页

作者： Dhumal, Amol Ambhore, Nitin Sanap, Gaurav Patil, Tanmay Sanap, Vishal Kadu, Aryan Department of Mechanical Engineering Vishwakarma Institute of Technology Pune411037 India Department of Mechanical Engineering Vishwakarma Institute of Information Technology Pune411048 India

The objective of this study is to analyze a three-way ball valve using computational fluid dynamic simulations in ANSYS Fluent to achieve better flow control and improve the efficiency of the system. The need to improve the energy efficiency and reliability of the fluid management system valves serves as motivation for this study. Flow analysis of the system includes determining key parameters like flow coefficient (Cv), pressure drop, and velocity distribution. A structured hexahedral mesh with layers of inflation was used to better capture flow behavior along with a grid independence check to ensure the right balance between accuracy and computation cost. Simulations were performed under five boundary conditions: velocity inlet and pressure outlets for the wall and volume to be treated as stationary. Complex interactions within the flow are prominent as significant differences in velocity as well as pressure occur at the junction of the valve. The valve characteristics were defined using Cv calculated at different velocities and various positions of the opening of the valve non-linearly correlated to the characteristics. Restrictive path effect on system pressure drop was measured in open and closed paths to assess the impact of restriction features on valve performance. The effects of the dynamic forces of control systems on valve positioning and flow regulation are pointed out as elucidated by the results of management of fluid forces during valve control. This research contributes towards the development of efficient and reliable three-way ball valves, which help in advancements in industrial fluid control systems. © The Author(s) 2025.

关键词： Pressure drop

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A review of emerging hydroforming technologies: design considerations, parametric studies, and recent innovations

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Journal of engineering and Applied Science 2024年第1期71卷 205页

作者： Chinchanikar, Satish Mulik, Harsh Varude, Param Atole, Sameer Mundada, Neha Department of Mechanical Engineering Vishwakarma Institute of Technology Maharashtra Pune India Department of Mechanical Engineering Vishwakarma Institute of Information Technology Pune India

Hydroforming is a modern metal-forming process prominently used in the shipbuilding, aerospace, and automotive industries for forming lightweight, complex-shaped geometries due to their inherent process benefits. But this process faces challenges such as limited material selection, high tooling costs, and complex process control for obtaining a defect-free part with uniform thickness. Researchers are constantly innovating and advancing hydroforming technologies to overcome these limitations. This work reviews emerging tube and sheet hydroforming technologies, considering parametric effects and design considerations, particularly for micro-domain applications. Further, a wider acceptance of the hydroforming process in different industries is explored by discussing the studies that tried to improve the efficiency and quality of the hydroforming process. This study observed that better formability could be achieved in hydroforming with appropriate intermediate heat treatment, proper lubrication, the correct design of loading paths, and temperature distribution. In tube hydroforming, wrinkles, necking, and cracking observed to be largely reduced by properly selecting the internal pressure and feeding. The precise protrusion height and uniform thickness at different joint cross-sections in tube forming are found to be significantly influenced by the strain-hardening exponent, loading path, and friction coefficient. Electrohydraulic forming is found being increasingly used due to its higher productivity and lower product cost. However, further research is required to achieve complex sheet geometries with sharp corners. This research emphasizes that advanced research, artificial intelligence integration, and the exploration of alternative materials can improve the performance of the hydroforming process. © The Author(s) 2024.

关键词： Automotive industry

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Extraction and Reconstruction of Data Points from Computer aided Design Using Deep Learning

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Journal of The Institution of Engineers (India): Series C 2024年第5期105卷 1121-1130页

作者： Dhumal, Amol Ambhore, Nitin Kolhe, Shyam Department of Mechanical Engineering Vishwakarma Institute of Information Technology Pune411048 India Department of Mechanical Engineering Vishwakarma Institute of Technology Pune411037 India

Variational autoencoders (VAEs) highly important in the fields of machine learning and artificial intelligence because of their versatility and effectiveness in various applications. The current study aims to investigate the application of deep learning models to reduce dimensionality and extract valuable properties from Computer-Aided Design (CAD) models. With an emphasis on the shaft model, this research study described a novel method for data compression and reconstruction of the CAD model using VAEs. The Python programming language is used in the study, together with its numerous libraries and frameworks for deep learning and data processing. The suggested method aims to reduce storage requirements, improve data accessibility, and preserve the integrity of the original CAD models, making an important contributions to the disciplines of CAD, data compression, and artificial intelligence. The findings of the research suggested that a variational autoencoder with a rectified linear unit (ReLU) provides a better correlation of approximately 95% between extracted and constructed data. © The Institution of Engineers (India) 2024.

关键词： Deep learning

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Microstructure transformations and improving wear resistance of austenitic stainless steel additively fabricated by arc-based DED process

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Defence technology（防务技术） 2024年第8期38卷 194-204页

作者： Ashish Yadav Manu Srivastava Prashant K.Jain Sandeep Rathee Hybrid Additive Manufacturing Laboratory Mechanical Engineering DepartmentPDPM Indian Institute of Information TechnologyDesign&ManufacturingJabalpur482005Madhya PradeshIndia FFF Laboratory Mechanical Engineering DepartmentPDPM Indian Institute of Information TechnologyDesign&ManufacturingJabalpur482005Madhya PradeshIndia Department of Mechanical Engineering National Institute of TechnologySrinagarIndia

In this study, austenitic stainless steel(ASS) was additively fabricated by an arc-based direct energy deposition(DED) technique. Macrostructure, microstructure, mechanical characteristics at different spatial orientations(0°, 90°, and 45°), and wear characteristics were evaluated at the deposited structure top, middle, and bottom regions. Results show that austenite(γ) and delta-ferrite(δ) phases make up most of the microstructure of additively fabricated SS316LSi steel. Within γ matrix, δ phase is dispersed both(within and along) grain boundaries, exhibiting a fine vermicular morphology. The bottom, middle,and top regions of WAAM deposited ASS exhibit similar values to those of wrought SS316L in the tensile and impact test findings. Notably, a drop in hardness values is observed as build height increases. During SEM examinations of fractured surfaces from tensile specimen, closed dimples were observed, indicating good ductility of as-built structure. Wear test findings show signs of mild oxidation and usual adhesive wear. By depositing a mechanically mixed composite layer, an increase in the oxidation percentage was discovered to facilitate healing of worn surfaces. The findings of this study will help in design, production and renovation of products/components that are prone to wear. WAAM-deposited ASS has remarkable strength and ability to withstand impacts;it can be used in the production of armour plates for defence applications, mainly military vehicles and aircraft.

关键词： Metal additive deposition Defence applications Arc-based DED Characterization Wear behaviour Fractography

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Study on the Influence of Curing Method on the Lapping Performance of Fixed Abrasive Pads

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Journal of Materials engineering and Performance 2025年 1-12页

作者： Wang, Zhan-kui Dong, Feng-song Zhao, Zhi-cheng Liu, Kun-cheng Zhang, Xu Yao, Yun-long Pang, Ming-hua Ma, Li-jie Su, Jian-xiu School of Electro-Mechanical Engineering Zhongyuan Institute of Science and Technology Xuchang China School of Mechanical and Electrical Engineering Henan Institute of Science and Technology Xinxiang China School of Information Engineering Henan University of Science and Technology Henan Luoyang China

This paper investigated a new hybrid resin abrasive pad to improve quartz glass’s lapping efficiency and process stability. The preparation process of fixed abrasive pads was studied by using light and heat dual curing (ultraviolet curing technology and thermal curing technology). The relationship between light and heat dual curing fixed abrasive pads and their processing properties was analyzed in detail using material removal rate (MRR), surface roughness (SR), coefficient of friction (COF), and hardness (HD) as evaluation indicators. By improving the original light curing fixed abrasive pad technology, the advantages of using light and heat dual curing technology to prepare fixed abrasive pads were analyzed. The test results show that the MRR of three light and heat dual curing fixed abrasive pads (white corundum, diamond, and aggregate diamond) to quartz glass are 4.13, 5.93, and 3.62 μm/min, respectively, which are 4.3, 1.4, and 1.2 times higher than that of light curing abrasive pads. The three-dimensional cross-linked network structure is generated, which significantly increases the matrix strength of the abrasive pad and improves the processing performance. This study prepared an abrasive pad with excellent comprehensive properties, which provided a new processing tool and method for high-efficiency and high-quality lapping of quartz glass.

关键词： abrasive pads light and heat curing material removal rate quartz glass surface quality

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Numerical Simulation of Droplet Generation in Coaxial Microchannels

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Fluid Dynamics & Materials Processing 2024年第3期20卷 487-504页

作者： Zongjun Yin Rong Su Hui Xu School of Mechanical Engineering Anhui Institute of Information TechnologyWuhu241100China

In this study,numerical simulations of the pinching-off phenomena displayed by the dispersed phase in a continuous phase have been conducted using COMSOL Multiphysics(level-set method).Four flow patterns,namely“drop flow”,“jet flow”,“squeeze flow”,and“co-flow”,have been obtained for different flow velocity ratios,channel diameter ratios,density ratios,viscosity ratios,and surface *** flow pattern map of two-phase flow in coaxial microchannels has been obtained accordingly,and the associated droplet generation process has been critically discussed considering the related frequency,diameter,and pinch-off *** particular,it is shown that the larger the flow velocity ratio,the smaller the diameter of generated droplets and the shorter the pinch-off *** pinch-off length of a droplet is influenced by the channel diameter ratio and density *** changes in viscosity ratio have a negligible influence on the droplet generation pinching *** an increase in surface tension,the frequency of generation and pinch-off length of droplets decrease,but for small surface tension the generation diameter of droplet increases.

关键词： Droplet generation characteristics coaxial microchannels flow patterns pinch-off length

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Large scale MicroBlog location data capture method based on dynamic web page parsing

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International Journal of Web Based Communities 2025年第1-2期21卷 36-49页

作者： Ji, Yu Liu, Huanhuan Wang, Zhenzhen Sun, Rui Organization Department Hebei Institute of Mechanical and Electrical Technology Xingtai054000 China Department of Information Engineering Hebei Institute of Mechanical and Electrical Technology Xingtai054000 China

Due to the large scale of data, the deviation coefficient of the captured data is large and the capture efficiency is low. To this end, a large-scale Weibo location data retrieval method based on dynamic web page parsing is proposed. Firstly, based on the source of Weibo location data, artificial neural models and random functions are introduced to calculate the weights of feature data. Next, generate a feature vector table and classifier model, and filter the feature text using the established classification model. Finally, by matching the feature data of Weibo location data between dynamic script sites and web pages, a dynamic script parsing framework for Weibo location data on web pages is constructed, and dynamic web page parsing technology is used to capture Weibo location data. The experimental results show that the proposed method has only a 0.1% error in data capture bias, and the capture efficiency reaches 99%. Therefore, this method can significantly improve the crawling effect of large-scale Weibo location data and has certain feasibility. Copyright © 2025 Inderscience Enterprises Ltd.

关键词： artificial neuron model crawling dynamic script site dynamic web page parsing MicroBlog location data random function

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Lithium ion battery thermal management by using coupled heat pipe and liquid cold plate

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Materials Today: Proceedings 2023年 80卷 382-388页

作者： Chavan, Umesh Prajapati, Omkar Hujare, Pravin Deparment of Mechanical Engineering Vishwakarma Institute of Technology Pune India Deparment of Mechanical Engineering Vishwakarma Institute of Information Technology Pune India

Operating temperature of lithium ion battery is critical factor for lifecycle, efficiency and energy storage. In electric vehicle thermal behaviour of batteries affects the overall range of vehicle. Aim of this paper is to provide a thermal management system for cylindrical batteries using heat pipe and cold plate. The heat pipe coupled with battery serves as heat transporter from battery to cold plate. The lumped parametricmodel based on hydro-electrical analogy was developed to verify thermal performance. Bench test setup is developed using actual cylindrical 18,650 type batteries and heating elements. The resultsof lumped parametricmodel compared with actual test *** shows temperature drop by 6 °C and uniform distribution along the length of battery. Thus proposed design is useful for Lithium ion battery performance and *** in the present research paper is two heat dissipating systems are combined viz. one active (cold plate) and another passive (heat pipe) which provides better heat dissipation and uniformity in temperature of battery cells. © 2022

关键词： Temperature control

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Experimental study of 3D printed carbon fibre sandwich structures for lightweight applications

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Defence technology（防务技术） 2024年第6期36卷 71-77页

作者： Solaiprakash Vellaisamy Raguraman Munusamy Department of Mechanical Engineering Indian Institute of Information Technology Design and ManufacturingKancheepuramChennai600127India School of Interdisciplinary Design and Innovation Indian Institute of Information Technology Design and ManufacturingKancheepuramChennai600127India

Honeycomb sandwich structures are widely used in lightweight ***,these structures are subjected to extreme loading conditions,leading to potential failures due to delamination and debonding between the face sheet and the honeycomb ***,the present study is focused on the mechanical characterisation of honeycomb sandwich structures fabricated using advanced 3D printing *** continuous carbon fibres and ONYX-FR matrix materials have been used as raw materials for 3D printing of the specimens needed for various mechanical characterization testing;ONYX-FR is a commercial trade name for flame retardant short carbon fibre filled nylon filaments,used as a reinforcing material in Morkforged 3D *** and flatwise compression tests have been conducted for different configurations of honeycomb sandwich structures,fabricated by varying the face sheet thickness and core cell size,while keeping the core cell thickness and core height *** on these tests,the proposed structure with face sheet thickness of 3.2 mm and a core cell size of 12.7 mm exhibited the highest energy absorption and prevented delamination and debonding ***,3D printing technology can also be considered as an alternative method for sandwich structure ***,detailed parametric studies still need to be conducted to meet various other structural integrity criteria related to the lightweight applications.

关键词： 3D printed composite Honeycomb sandwich Edgewise compression Flatwise compression Lightweight

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A Low-Complexity and High-Accuracy Defect Detection Network

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Journal of Systems Science & Complexity 2025年第2期38卷 573-596页

作者： ZHOU Xunkuai CHEN Xi CHEN Jie CHEN Ben M. School of Electronics and Information Engineering Tongji University Department of Mechanical and Automation Engineering The Chinese University of Hong Kong The Chinese University of Hong Kong Harbin Institute of Technology

Visual-based defect detection efficiently monitors the health and quality of construction and industrial products. However, current defect detection methods often improve detection accuracy at the cost of lower inference speeds or more parameters, struggle with complex data representation, emphasize target features while neglecting environmental information importance, and utilize convolutional or max pooling operations for downsampling, leading to more feature loss. To address these issues, this work presents a low complexity, accurate defect detection network augmented by environmental information-assisted and flexible activation functions to enhance the neural network performance on complex data representation. Environmental information-assisted module is designed for defect detection tasks to assist in accurately locating and predicting defects. Moreover, this work restructure features post-downsampling to mitigate feature loss and design a simple feature module called deep-global fusion that integrates deep and global features to enhance detection *** experiments validate the superiority of the proposed detection network. The deployment of the network on edge computing devices confirms its competitive advantage in portability and reliability.

关键词： Activation function defects detection environmental information-assisted low complexity

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