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直流线圈励磁的有限元分析计算 被引量:7
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作者 周奇 康宜华 +1 位作者 武新军 丁劲锋 《无损检测》 北大核心 2006年第12期630-632,共3页
直流线圈励磁是管杆漏磁检测中一种最常用的磁化方法。采用有限元方法分析了直流线圈励磁的基本特性,计算出了线圈尺寸、安匝数和增加聚磁板后对管道有效磁化能力的影响,对比分析了多种不同磁化方式的磁化效果,并绘出了各自磁力线的分布... 直流线圈励磁是管杆漏磁检测中一种最常用的磁化方法。采用有限元方法分析了直流线圈励磁的基本特性,计算出了线圈尺寸、安匝数和增加聚磁板后对管道有效磁化能力的影响,对比分析了多种不同磁化方式的磁化效果,并绘出了各自磁力线的分布图,从而总结出了缺陷漏磁场的切向分量与励磁强度和提离值之间的关系。重点说明了聚磁技术在励磁器设计中的重要性和有效性。分析结果为管杆漏磁检测中直流线圈磁化器的设计提供了有力的依据。 展开更多
关键词 有限元法 聚磁板 线圈励 提离值
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Impact of radiation,melting,and chemical reaction on magnetohydrodynamics nanoparticle aggregation flow across parallel plates
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作者 Ram Prakash SHARMA J.K.MADHUKESH +3 位作者 Sunendra SHUKLA Amal ABDULRAHMAN B.C.PRASANNAKUMARA K.V.NAGARAJA 《Journal of Central South University》 SCIE EI CAS 2024年第10期3715-3729,共15页
The heat transfer between two corresponding plates,disks,and concentric pipes has many applications,including water cleansing and lubrication.Furthermore,TiO_(2)-water-based nanofluids are used widely because it is us... The heat transfer between two corresponding plates,disks,and concentric pipes has many applications,including water cleansing and lubrication.Furthermore,TiO_(2)-water-based nanofluids are used widely because it is useful for operating and controlling the temperature,especially in photovoltaic technology and solar panels.Motivated by these applications,the current study is based on the nanoparticle aggregation effect on magnetohydrodynamics(MHD)flow via rotating parallel plates with the chemical reaction.To achieve maximum heat transportation,the Bruggeman model is used to adapt the Maxwell model.Also,melting and thermal radiation effects are considered in the modeling to discuss heat transport.The Runge-Kutta-Fehlberg 4th−5th order method is used to attain numerical solutions.The main focus of this study is to see the thermodynamic behavior considering several aspects of nanoparticle aggregation.The heat transfer rate between the parallel plates is enhanced by improving the thermophoresis,radiation,and Brownian motion parameters.The rise in Schmidt number and chemical reaction rate parameter decreases the concentration distribution.This study will be helpful in enhancing the thermal efficiency of photovoltaic technology in solar plates,water purifying,thermal management of electronic devices,designing effective cooling systems,and other sustainable technologies. 展开更多
关键词 nanoparticle aggregation thermal radiation parallel plates magnetic field chemical reaction
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