检索结果-南通市图书馆

Enhanced Hoek-Brown(H-B)criterion for rocks exposed to chemical corrosion

International Journal of Mining Science and Technology 2024年第5期34卷 609-630页

作者： Hao Li Leo Pel zhenjiang you David Smeulders Department of Mechanical Engineering Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands Department of Applied Physics Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands Center for Sustainable Energy and Resources School of EngineeringEdith Cowan UniversityJoondalupWA 6027Australia School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia Gas and Energy Transition Research Centre The University of QueenslandBrisbaneQLD 4072Australia

Underground constructions often encounter water environments,where water–rock interaction can increase porosity,thereby weakening engineering ***,the failure criterion for chemically corroded rocks becomes essential in the stability analysis and design of such *** study enhances the applicability of the Hoek-Brown(H-B)criterion for engineering structures operating in chemically corrosive conditions by introducing a kinetic porosity-dependent instantaneous mi(KPIM).A multiscale experimental investigation,including nuclear magnetic resonance(NMR),X-ray diffraction(XRD),scanning electron microscopy(SEM),pH and ion chromatography analysis,and triaxial compression tests,is employed to quantify pore structural changes and their linkage with the strength responses of limestone under coupled chemical-mechanical(C-M)*** employing ion chromatography and NMR analysis,along with incorporating the principles of free-face dissolution theory accounting for both congruent and incongruent dissolution,a kinetic chemical corrosion model is *** model aims to calculate the kinetic porosity alterations within rocks exposed to varying H+concentrations and ***,utilizing the generalized mixture rule(GMR),the kinetic porositydependent mi is *** of the KPIM-enhanced H-B criterion using compression test data from 5 types of rocks demonstrated a high level of consistency between the criterion and the experimental results,with a coefficient of determination greater than 0.96,a mean absolute percentage error less than 4.84%,and a root-mean-square deviation less than 5.95 ***,the physical significance of the porosity-dependent instantaneous mi is clarified:it serves as an indicator of a rock’s capacity to leverage the confining pressure effect.

关键词： Hoek-Brown(H-B)criterion Instantaneous mi Kinetic porosity-dependency Chemical corrosion Compressive strength

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Stochastic and upscaled analytical modeling of fines migration in porous media induced by low-salinity water injection

引用

Applied Mathematics and Mechanics(English Edition) 2020年第3期41卷 491-506页

作者： Yulong YANG Weifeng YUAN Jirui HOU zhenjiang you Jun LI Yang LIU Unconventional Petroleum Research Institute China University of PetroleumBeijing 102249China School of Chemical Engineering The University of QueenslandBrisbane QLD 4072Australia College of Petroleum Engineering China University of PetroleumBeijing 102249China

Fines migration induced by injection of low-salinity water(LSW) into porous media can lead to severe pore plugging and consequent permeability reduction. The deepbed filtration(DBF) theory is used to model the aforementioned phenomenon, which allows us to predict the effluent concentration history and the distribution profile of entrapped particles. However, the previous models fail to consider the movement of the waterflood front. In this study, we derive a stochastic model for fines migration during LSW flooding, in which the Rankine-Hugoniot condition is used to calculate the concentration of detached particles behind and ahead of the moving water front. A downscaling procedure is developed to determine the evolution of pore-size distribution from the exact solution of a large-scale equation system. To validate the proposed model,the obtained exact solutions are used to treat the laboratory data of LSW flooding in artificial soil-packed columns. The tuning results show that the proposed model yields a considerably higher value of the coefficient of determination, compared with the previous models, indicating that the new model can successfully capture the effect of the moving water front on fines migration and precisely match the effluent history of the detached particles.

关键词： low-salinity water(LSW)flooding fines migration stochastic model downscaling porous media waterflooding front exact solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling Tracer Flow Characteristics in Different Types of Pores: Visualization and Mathematical Modeling

引用

Computer Modeling in Engineering & Sciences 2020年第6期123卷 1205-1222页

作者： Tongjing Liu Weixia Liu Pengxiang Diwu Gaixing Hu TingXu Yuqi Li zhenjiang you Runwei Qiao Jia Wang State Energy Center for Shale Oil Research and Development Beijing100083China Unconventional Petroleum Research Institute China University of PetroleumBeijing102249China Research Institute of Petroleum Exploration and Development Sinopec Shengli Oilfield CompanyDongying257015China College of Science China University of PetroleumBeijing102249China Oil and Gas Technology Institute PetroChina Changqing Oilfield CompanyXi’an710081China National Engineering Laboratory of Low Permeability Oil&Gas Exploration and Development Xi’an710081China Research Institute of Petroleum Exploration and Development SINOPECBeijing100083China School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

Structure of porous media and fluid distribution in rocks can significantly affect the transport characteristics during the process of microscale tracer *** clarify the effect of micro heterogeneity on aqueous tracer transport,this paper demonstrates microscopic experiments at pore level and proposes an improved mathematical model for tracer *** visualization results show a faster tracer movement into movable water than it into bound water,and quicker occupancy in flowing pores than in storage pores caused by the difference of tracer ***,the proposed mathematical model includes the effects of bound water and flowing porosity by applying interstitial flow velocity *** new model also distinguishes flowing and storage pores,accounting for different tracer transport mechanisms(dispersion,diffusion and adsorption)in different types of *** resulting analytical solution better matches with tracer production data than the standard *** residual sum of squares(RSS)from the new model is 0.0005,which is 100 times smaller than the RSS from the standard *** sensitivity analysis indicates that the dispersion coefficient and flowing porosity shows a negative correlation with the tracer breakthrough time and the increasing slope,whereas the superficial velocity and bound water saturation show a positive correlation.

关键词： Tracer flow characteristics different types of pores interstitial flow velocity visualization and mathematical modeling tracer concentration prediction model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stability in channel flow with fiber suspensions

引用

Progress in Natural Science:Materials International 2003年第2期 17-21页

作者： LIN Jianzhong and you zhenjiang(Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China) Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

Abstract The constitutive equation of fiber suspensions is established on the basis of fiber orientation tensors. The medified Orr-Sommerfeld stability equation is obtained further and numerically solved by aid of spectral method and finite difference method. The com-putational results of channel flow without fibers agree well with the experimental data with a higher degree of accuracy than previous nu-merical results. The results of the channel flow with fiber suspensions indicate that the presence of fibers attenuates the instability of flow,increases the critical Reynolds number, reduces the growth rate of perturbations and narrows the range of unstable waves. The extent ofthe effect of fibers on the flow stability is in direct proportion to the volume fraction and aspect-ratio of the fibers.

关键词： channel flow fiber suspensions flow stability.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

高浓度悬浮固粒对射流界面的粘性稳定性影响

引用

数学物理学报（A辑） 2001年第1期1卷 116-126页

作者：周泽宣林建忠游振江浙江大学力学系杭州310027

该文首次利用双流体模型和扰动速度势理论，推得含高浓度悬浮固粒的射流界面粘性稳定性方程和对应的固气扰动速度比值方程．通过数值计算，得到了不同雷诺数及固粒属性的射流界面粘性稳定性曲线和对应的固气扰动速度比值曲线．在分析和... 详细信息

该文首次利用双流体模型和扰动速度势理论，推得含高浓度悬浮固粒的射流界面粘性稳定性方程和对应的固气扰动速度比值方程．通过数值计算，得到了不同雷诺数及固粒属性的射流界面粘性稳定性曲线和对应的固气扰动速度比值曲线．在分析和比较所得的粘性稳定性曲线的基础上，得到了流场雷诺数及固粒特性对射流界面粘性稳定性影响的结论．同时，通过分析所得的固气扰动速度比值曲线，得到了流场雷诺数及固粒等效斯托克斯数对固粒跟随气流的扰动性能的影响的结论．这些结论是首次在计入气流的粘性的条件下得到的，不同于文献［８］和文献［１０］相关的囿于无粘情形的研究，对于两相射流发展的认识和工程实际中实施对两相射流场的人工控制有重要意义．

关键词：界面粘性稳定性固粒扰动特性悬浮固粒射流数值计算

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Stability and Drag Reduction in Transient Channel Flow of Fibre Suspension

引用

Chinese Journal of Chemical Engineering 2004年第3期12卷 319-323页

作者：游振江林建忠邵雪明张卫峰 Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China Institute of Marine and Coastal Sciences Rutgers University New Brunswick New Jersey USA 08903-0231rag reduction features in the transition regime of channel flow with fibre suspension were analyzed in terms of the linear stability theory. The modified stability equation was obtained based on the slender-body theory and natural closure approximation. Results of the stability analysis show attenuating effects of fibre additives to the flow instability. For the cases leading to transition drag reduction rate increases with the characteristic parameter H of fibres. The mechanism of drag reduction by fibres is revealed through the variation of velocity profile and the decrease of wall shear stress. The theoretical results are qualitatively consistent with some typical experiments.

Drag reduction features in the transition regime of channel flow with fibre suspension were analyzed in terms of the linear stability theory. The modified stability equation was obtained based on the slender-body theory and natural closure approximation. Results of the stability analysis show attenuating effects of fibre additives to the flow instability. For the cases leading to transition, drag reduction rate increases with the characteristic parameter H of fibres. The mechanism of drag reduction by fibres is revealed through the variation of velocity profile and the decrease of wall shear stress. The theoretical results are qualitatively consistent with some typical experiments.

关键词： drag reduction flow stability fibre suspension channel flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

气固两相流风机磨损问题的研究综述

引用

风机技术 2000年第1期42卷 14-18页

作者：游振江林建忠邵雪明浙江大学杭州市310027

本文回顾了国内外气固两相流风机磨损的研究近况 ,着重叙述了与气固两相流风机磨损研究有关的流场计算、叶片磨损研究以及抗磨优化设计等几个方面的研究成果及其特点 ,对耐磨气固两相流风机的研究与开发具有参考价值。

关键词：通风机叶片磨损气固两相流

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

对致密气藏水膜厚度的再认识

引用

中国海上油气 2019年第1期31卷 94-102页

作者：杨宇周文姜平张辉周伟杨琛张昊游振江油气藏地质及开发工程国家重点实验室(成都理工大学) 四川成都610059 中海石油(中国)有限公司湛江分公司广东湛江524057 成都理工大学能源学院四川成都610059 阿德莱德大学石油学院

在实际气层中,束缚水以毛管束缚水和水膜形式存在。根据由Derjaguin-Landau-Verwey-Overbee理论建立的总分离压和水膜厚度的理论计算模型,结合扩展young-Laplace公式,采用迭代算法,提出了计算储层水膜厚度的图解法。利用实际地层实测温... 详细信息

在实际气层中,束缚水以毛管束缚水和水膜形式存在。根据由Derjaguin-Landau-Verwey-Overbee理论建立的总分离压和水膜厚度的理论计算模型,结合扩展young-Laplace公式,采用迭代算法,提出了计算储层水膜厚度的图解法。利用实际地层实测温度、压力数据,得到总分离压与水膜厚度曲线,求得在气藏中部孔隙中的水膜厚度远小于含气孔隙半径。在实际气藏的高矿化度水溶液中,静电斥力较小,只有Van der Waals引力是保持水膜稳定的主要作用力,因此气藏孔隙中水膜厚度小。对比临界孔隙半径和水膜厚度的计算值表明,束缚水主要以毛管束缚水的形式存在,水膜厚度远小于含气孔隙的半径,对天然气渗流的影响小。

关键词：气藏毛管压力分离压力束缚水水膜厚度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reconfigurable physical unclonable cryptographic primitives based on current-induced nanomagnets switching

引用

Science China(Information Sciences) 2022年第2期65卷 188-196页

作者： Shuai ZHANG Jian ZHANG Shihao LI Yaoyuan WANG zhenjiang CHEN Jeongmin HONG Long you Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and Technology

Hardware security primitives that preserve secrets are playing a crucial role in the Internet-ofThings(Io T) era. Existing physical unclonable function(PUF) instantiations, exploiting static randomness,generate challenge-response pairings(CRPs) to produce unique security keys that can be used to authenticate devices linked to the Io T. Reconfigurable PUFs(RPUFs) with dynamically refreshable CRPs can enhance the security and robustness of conventional PUFs. The in-plane current-driven perpendicular polarized nanomagnet switching via spin-orbit torque(SOT) possesses great potential for application to memory and logic, as the write-current path is separate from the read-current path, which naturally resolves the write-read interference. However, the stochastic switching of perpendicular magnetization, without an additional symmetry-breaking field, would significantly hinder the technological viability of commercial implementations. Here, we report an initialization-free physical RPUF implemented by SOT-induced stochastic switching of perpendicularly magnetized Ta/Co Fe B/Mg O nanodevices. Using a 15×15 nanomagnet array, we experimentally demonstrate a security primitive that offers a near-ideal 50% uniqueness over 100 reconfiguration cycles, as well as a low correlation coefficient between every two reconfiguration cycles. Our results show that current-induced nanomagnets switching paves the way for developing highly reliable and energy-efficient reconfigurable cryptographic primitives with a smaller footprint.

关键词： reconfigurable physical unclonable function spin-orbit torque cryptographic primitive spintronics nanomagnet

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Technologies for pollutant removal and resource recovery from blackwater:a review

引用

Frontiers of Environmental Science & Engineering 2023年第7期17卷 57-77页

作者： Wei Zhang Huaqiang Chu Libin Yang Xiaogang you zhenjiang Yu Yalei Zhang Xuefei Zhou State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Blackwater(BW),consisting of feces,urine,flushing water and toilet paper,makes up an important portion of domestic *** improper disposal of BW may lead to environmental pollution and disease transmission,threatening the sustainabie development of the *** in nutrients and organic matter,BW could be treated for resource recovery and reuse through various *** at providing guidance for the future development of BW treatment and resource recovery,this paper presented a literature review of BWs produced in different countries and types of toilets,including their physiochemical characteristics,and current treatment and resource recovery *** degradation and utilization of carbon(C),nitrogen(N)and phosphorus(P)within BW are *** performance of different systems was classified and *** all the treating systems,biological and ecological systems have been long and widely applied for BW treatment,showing their universality and operability in nutrients and energy recovery,but they are either slow or ineffective in removal of some refractory *** processes,especially advanced oxidation processes(AOPs),are becoming increasingly extensively studied in BW treatment because of their high efficiency,especially for the removal of micropollutants and *** review could serve as an instructive guidance for the design and optimization of BW treatment technologies,aiming to help in the fulfilment of sustainable human excreta management.

关键词： Blackwater Water-flushing toilet Sanitation Nutrientrecovery Waterreuse Sustainable development

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：