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Turbulent Flow and Transport of Bubbles in Slab Continuous Casting Mold Under Electromagnetic Brake

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Journal of Iron and Steel Research International 2012年第S2期19卷 965-968页

作者： liu zhong-qiu LI Bao-kuan WANG Qiang JIANG Mao-fa School of Materials and Metallurgy Northeastern University

Large eddy simulation model with magnetohydrodynamics(MHD)is developed to study the effect of electromagnetic braker(EMBr)on molten steel flow and transport of argon bubbles in the continuous casting process. The large eddy simulation with Smagorinsky sub-grid scale model is used to calculate the turbulent *** results indicate that the magnetic force can optimize the molten steel flow pattern in the braking *** flow is asymmetric, especially in the lower of the mold,even if with applied electromagnetic *** flow deviation of the molten steel in the mold is inevitable *** bubbles tend to release from the top surface with LMF-EMBr,while,FCMF-EMBr has little effect on the overall removal fraction of bubbles,but it affects the trajectory of bubbles.

关键词： continuous casting mold large eddy simulation bubble electromagnetic brake

Fluid Flow and Heat Transfer in a Continuous Casting Tundish With the Channel Type Induction Heating

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Journal of Iron and Steel Research International 2012年第S2期19卷 969-972页

作者： WANG Qiang WANG Fang WANG Bo liu zhong-qiu LI Bao-kuan School of Materials and Metallurgy Northeastern University

A coupled mathematical model was developed to describe the flow field,temperature distribution of molten steel in the tundish with the channel type induction *** molten steel motion was dominated under the combined effect of the thermal buoyancy and the electro-magnetic forces(EMFs)due to the channel type induction *** results indicate that the thermal loss of molten steel in the tundish can be compensated effectively by the channel type induction *** addition,the molten steel would flow upward under the thermal buoyancy which can reduce the erosion of ***,the upward flow would increase the residence time of the molten steel in the tundish which provide more opportunities for the inclusion to reach the top surface of the tundish.

关键词： continuous casting tundish induction heating electro-magnetic forces heat transfer

3, 4-seco-Labdane diterpenoids from the leaves of Callicarpa nudiflora with anti-inflammatory effects

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Chinese Journal of Natural Medicines 2019年第9期17卷 707-712页

作者： WANG Hong-Gang LUO Fu-Kang LEI Xiang YAO Yun-Da LIAO Guo-Chao liu zhong-qiu JIANG Zhi-Hong ZHOU Hua WU Peng Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of China International Institute for Translational Chinese MedicineGuangzhou University of Chinese MedicineGuangzhou 510006China School of Translational Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhou 510006China State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyMacao 999078China

Four new 3,4-seco-labdane diterpenoids,nudiflopenes J-M,were isolated from the leaves of Callicarpa nudiflora along with six known *** structures of these diterpenoids were determined by comprehensive spectroscopic *** the isolated compounds were evaluated for their inhibitory effects on NO production in LPS-stimulated RPMs and RAW264.7 *** results suggest that nudiflopenes J-M and other four known compounds showed significant inhibitory effects against NO production comparable to the positive control dexamethasone.

关键词： Callicarpa nudiflora Verbenaceae 3,4-seco-Labdane diterpenoid Anti-inflammatory RPMs RAW264.7

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连铸结晶器内偏流及漩涡卷渣的实验研究

东北大学学报（自然科学版） 2017年第5期38卷 666-670页

作者：刘中秋李宝宽东北大学冶金学院辽宁沈阳110819

连铸结晶器内的偏流和漩涡卷渣行为严重影响连铸坯的质量,因此建立了一套直弧型结晶器系统,研究了偏流和漩涡卷渣的运动规律.结果发现:偏流是由于流场自身的不稳定造成的,是时刻变化的;偏流发生在二冷区弯曲段附近.即使保证水口对中放置... 详细信息

连铸结晶器内的偏流和漩涡卷渣行为严重影响连铸坯的质量,因此建立了一套直弧型结晶器系统,研究了偏流和漩涡卷渣的运动规律.结果发现:偏流是由于流场自身的不稳定造成的,是时刻变化的;偏流发生在二冷区弯曲段附近.即使保证水口对中放置,结晶器上表面漩涡依然存在,多数情况下只有单个漩涡出现,其位置和大小是瞬变的.对称涡出现的机率较小,尺寸和强度较小,持续时间较短.同时考察了拉速、水口插入深度、滑动水口开度和中间包液位高度对偏流及其周期和漩涡卷渣的影响.

关键词：连铸结晶器偏流漩涡卷渣水模型实验

Turbulent Flow and Transport of Bubbles in Slab Continuous Casting Mold Under Electromagnetic Brake

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Turbulent Flow and Transport of Bubbles in Slab Continuous C...

第七届冶金与材料电磁过程国际会议（EPM2012）

作者： liu zhong-qiu LI Bao-kuan WANG Qiang JIANG Mao-fa School of Materials and Metallurgy Northeastern University

Large eddy simulation model with magnetohydrodynamics（MHD） is developcd to study the effect of electromagnetic braker（EMBr） on molten steel flow and transport of argon bubbles in the continuous casting *** large eddy simulation with Smagorinsky sub-grid scale model is used to calculate the turbulent *** results indicate that the magnetic force can optimize the molten steel flow pattern in the braking *** flow is asymmetric,especially in the lower of the mold,even if with applied electromagnetic *** flow deviation of the molten steel in the mold is inevitable *** bubbles tend to release from the top surface with LMF-EMBr,while,FCMF-EMBr has little effect on the overall removal fraction of bubbles,but it affects the trajectory of bubbles.

关键词： continuous casting mold large eddy simulation bubble electromagnetic brake

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利用高炉出铁重力势能的旋流反应器冶金特性

东北大学学报（自然科学版） 2015年第8期36卷 1120-1124,1135页

作者：王芳王强刘中秋李宝宽东北大学材料与冶金学院辽宁沈阳110819

从高炉出铁口中射出的铁水具有一定的初动能,且出铁沟有一定的坡度.本项目提出了一种利用高炉出铁沟重力势能脱硫的新型冶金反应器.基于湍流模型与多相流模型的耦合,应用液面追踪技术,实现了对冶金重力势能反应器内流体流动及液面波动... 详细信息

从高炉出铁口中射出的铁水具有一定的初动能,且出铁沟有一定的坡度.本项目提出了一种利用高炉出铁沟重力势能脱硫的新型冶金反应器.基于湍流模型与多相流模型的耦合,应用液面追踪技术,实现了对冶金重力势能反应器内流体流动及液面波动行为的模拟计算,并用水模拟结果进行了对比验证.从分析的结果来看,铁水在反应器内能够形成良好的旋流效果.实验所得的RTD曲线与计算所得的结果吻合较好.碗型反应器的旋流效果最好,能够产生高强度稳定的旋流.

关键词：重力势能搅拌特性冶金反应器数值模拟

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen liu Xuliang Lin Xueqing qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

考虑渗透系数变化的地下结构温度-渗流耦合分析

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力学季刊 2011年第2期32卷 183-188页

作者：刘明章青刘仲秋范颖河海大学水文水资源与水利工程科学国家重点实验室南京210098 河海大学工程力学研究所南京210098 山东农业大学水利土木工程学院泰安271018

地下岩体的温度随着深度的增加呈逐渐上升的趋势,在地下水的作用下,岩体温度-渗流耦合作用明显。分析了地下岩体温度场与渗流场间的相互作用效应,考虑流体渗流和岩体骨架本身的热传导作用以及温度梯度所产生的渗流作用,并计入温度对水... 详细信息

地下岩体的温度随着深度的增加呈逐渐上升的趋势,在地下水的作用下,岩体温度-渗流耦合作用明显。分析了地下岩体温度场与渗流场间的相互作用效应,考虑流体渗流和岩体骨架本身的热传导作用以及温度梯度所产生的渗流作用,并计入温度对水体运动粘滞系数及岩体渗透率的影响,给出了完整的基于连续介质模型的地下岩体温度-渗流耦合数学模型。借助多物理场耦合软件CM,运用该耦合模型对某核废料地质贮存模型进行了双场耦合分析,分析结果显示,考虑温度-渗流耦合作用后,对废料地质贮存区附近的围岩稳定性产生了不利影响,需引起足够的重视。

关键词：温度场渗流场多物理场耦合核废料贮存

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垂直连铸凝固过程的数值模拟研究

东北大学学报（自然科学版） 2020年第9期41卷 1257-1261页

作者：王卓李宝宽刘中秋牛冉东北大学冶金学院辽宁沈阳110819

采用基于Eulerian-Eulerian方法和合金凝固理论的液相-柱状晶-等轴晶三相凝固模型,对立式连铸工艺中结晶器内的凝固过程进行了研究.对比焓-多孔介质凝固模型,除热溶质浮升力导致的熔体流动,该三相凝固模型还考虑了柱状晶组织的生长、等... 详细信息

采用基于Eulerian-Eulerian方法和合金凝固理论的液相-柱状晶-等轴晶三相凝固模型,对立式连铸工艺中结晶器内的凝固过程进行了研究.对比焓-多孔介质凝固模型,除热溶质浮升力导致的熔体流动,该三相凝固模型还考虑了柱状晶组织的生长、等轴晶组织的形成和演变以及游离等轴晶粒的沉浮,揭示了等轴晶沉降漂移作用对宏观溶质传输及凝固组织分布的影响.模拟结果显示铸坯中心处由等轴晶粒沉积形成的富等轴晶区存在溶质负偏析,紧邻该负偏析区域存在带状偏析区域.随着钢液过热度增加,等轴晶分布减少,中心处宏观偏析加重.

关键词：连铸宏观偏析晶粒沉降柱状晶凝固组织