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Mathematical model of micropolar fluid in two-phase immiscible fluid flow through porous channel

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Applied Mathematics and Mechanics(English Edition) 2018年第7期39卷 993-1006页

作者： P.K.YADAV s.jaiswal B.D.sHARMA Department of Mathematics Motilal Nehru National Institute of Technology Allahabad

This paper is concerned with the flow of two immiscible fluids through a porous horizontal channel. The fluid in the upper region is the micropolar fluid/the Eringen fluid, and the fluid in the lower region is the Newtonian viscous fluid. The flow is driven by a constant pressure gradient. The presence of micropolar fluids introduces additional rotational parameters. Also, the porous material considered in both regions has two different permeabilities. A direct method is used to obtain the analytical solu- tion of the concerned problem. In the present problem, the effects of the couple stress, the micropolarity parameter, the viscosity ratio, and the permeability on the velocity profile and the microrotational velocity are discussed. It is found that all the physical parameters play an important role in controlling the translational velocity profile and the microrotational velocity. In addition, numerical values of the different flow parameters are computed. The effects of the different flow parameters on the flow rate and the wall shear stress are also discussed graphically.

关键词： micropolar fluid immiscible fluid porous medium couple stress microp=olarity parameter

Instability Analysis of Mosquito Fascicle under Compressive Load with Vibrations and Microneedle Design

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Journal of Bionic Engineering 2015年第3期12卷 443-452页

作者： sanket jaiswal sreekumar Muthuswamy Indian Institute of lnformation Technology Design and Manufacturing (IIITD&M) Kancheepuram Chennai - 600127 India

Mosquito has the ability to penetrate the skin with painless insertion. It has attracted the researchers to mimic the bite and develop a painless microneedle. Mosquito applies axial compressive load along with frequency on fascicle to penetrate the human skin and retract if it senses instability prior to insertion. The mechanism of mosquito bite is studied in this work which is divided into two stages for analysis considering different boundary conditions. The probing behaviour of mosquito is considered as stage I and the process of penetration as stage II. An equivalent mechanical model for stage I is proposed and a mathematical model is developed to understand the instability of fascicle in terms of frequency and magnitude of force applied. The governing equation and associated boundary conditions are simplified into Mathieu equation and regions of dynamic instability are obtained through the solution. Results confirm instability of the fascicle during stage I of insertion. The probing behaviour of mosquito is discussed in terms of applied force and vibrating frequency. Horizontal reaction forces exerted by labium on fascicle during buckling improve the stability and enable fascicle to withstand high compressive forces. The analysis and results are utilized to set design guidelines for the development of dynamically stable vibration-assisted microneedle.

关键词： biommimetics mosquito proboscis instability analysis Mathieu equation microneedle design

Optimality Conditions and Duality for Nondifferentiable Multiobjective semi-Infinite Programming Problems with Generalized(C,α,ρ,d)-Convexity

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Journal of systems science & Complexity 2015年第1期28卷 47-59页

作者： MIsHRA shashi Kant jaiswal Monika HOAI AN Le Thi Department of Mathematics Banaras Hindu University Laboratory of Theoretical and Applied Computer science LITA UFR MIMUniversity of Lorraine

This paper obtains sufficient optimality conditions for a nonlinear nondifferentiable multiobjective semi-infinite programming problem involving generalized(C,α,ρ,d)-convex *** authors formulate Mond-Weir-type dual model for the nonlinear nondifferentiable multiobjective semiinfinite programming problem and establish weak,strong and strict converse duality theorems relating the primal and the dual problems.

关键词： Duality generalized convexity optimality conditions semi-infinite programming.

A framework for the sustainability implications of 3D bioprinting through nature-inspired materials and structures

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Bio-Design and Manufacturing 2022年第2期5卷 412-423页

作者： Ruban Whenish seeram Ramakrishna Amit Kumar jaiswal Geetha Manivasagam Center for Biomaterials Cellular and Molecular TheranosticsVellore Institute of TechnologyVelloreTamilnadu 632014India Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1119260Singapore

Introduction The climax of the industrial revolution was marked by the rapid growth of industry,and advancement in technologies have further fueled this industrial expansion,leading to a surge in economic *** technolo... 详细信息

关键词： printing advancement revolution

Estimation of drift limits for different seismic damage states of RC frame staging in elevated water tanks using Park and Ang damage index

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Earthquake Engineering and Engineering Vibration 2020年第1期19卷 161-177页

作者： suraj O.Lakhade Ratnesh Kumar O.R.jaiswal Department of Applied Mechanics Visvesvaraya National Institute of Technology

Damage to elevated water tanks in past earthquakes can be attributed to the poor performance of their supporting frame staging. In order to ascertain the performance of these elevated water tanks, it is crucial to categorize the damage in quantifiable damage states. Among various parameters to quantify the damage states, the top drift of frame staging can be conveniently correlated to the different damage levels. In literature, drift limits corresponding to different damage states of the frame staging of the elevated water tank are not available. In the present study, drift limits for RC frame staging in elevated water tanks corresponding to different seismic damage states have been proposed. Various damage states of the elevated water tank have been determined using the Park and Ang damage index. The Park and Ang damage index utilizes results of both pushover analysis and incremental dynamic analysis. Twelve models of elevated water tanks have been developed considering variation in staging height and tank capacity. Incremental dynamic analysis has been performed using the suite of twelve actual earthquake ground motions. Based on the regression analysis between damage indexes and drift, limiting drift values for each damage state are proposed.

关键词： elevated water tank frame staging damage states drift limit 3D modelling incremental dynamic analysis pushover analysis

Evaluation of slope stability through rock mass classification and kinematic analysis of some major slopes along NH-1A from Ramban to Banihal, North Western Himalayas

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 167-182页

作者： Amit jaiswal A.K.Verma T.N.singh Department of Civil and Environmental Engineering Indian Institute of Technology PatnaPatna801106India

The network of Himalayan roadways and highways connects some remote regions of valleys or hill slopes,which is vital for India’s socio-economic *** to natural and artificial factors,frequency of slope instabilities along the networks has been increasing over last few *** of stability of natural and artificial slopes due to construction of these connecting road networks is significant in safely executing these roads throughout the *** rock mass classification methods are generally used to assess the strength and deformability of rock *** study assesses slope stability along the NH-1A of Ramban district of North Western *** structurally and non-structurally controlled rock mass classification systems have been applied to assess the stability conditions of 14 *** evaluating the stability of these slopes,kinematic analysis was performed along with geological strength index(GsI),rock mass rating(RMR),continuous slope mass rating(CosMR),slope mass rating(sMR),and Q-slope in the present *** sMR gives three slopes as completely unstable while CosMR suggests four slopes as completely *** stability of all slopes was also analyzed using a design chart under dynamic and static conditions by slope stability rating(ssR)for the factor of safety(Fos)of 1.2 and 1 respectively.Q-slope with probability of failure(PoF)1%gives two slopes as stable *** slope angle has been determined based on the Q-slope safe angle equation and ssR design chart based on the *** value ranges given by different empirical classifications were RMR(37-74),GsI(27.3-58.5),sMR(11-59),and CosMR(3.39-74.56).Good relationship was found among RMR&ssR and RMR&GsI with correlation coefficient(R 2)value of 0.815 and 0.6866,***,a comparative stability of all these slopes based on the above classification has been performed to identify the most critical slope along this road.

关键词： Rock mass classification Kinematic analysis slope stability Himalayan road static and dynamic conditions

DIC Based strain and Damage Analysis of Large scale steel to Composite Adhesive Joints subjected to Tension and Compression Loading

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China Ocean Engineering 2023年第4期37卷 588-597页

作者： Pankaj R.jaiswal Rahul Iyer KUMAR Richard TRUMPER Wim DE WAELE soete Laboratory Department of ElectromechanicalSystems and Metal Engineering(EMSME)Ghent UniversityGhent 9052Belgium BAE systems London SW1Y 5ADUnited Kingdom

This paper reports an experimental study of the mechanical response to tensile and compressive force of large scale steel to composite joints adhesively bonded with a thin layer of vinylester *** one specimen,the length of the reinforcing fibres in contact with the steel substrate has been reduced by saw cutting at both ends of the *** damaged specimen and four intact specimens were subjected to quasi-static tensile testing;six specimens were used for compression *** strain distribution at the composite surface and at the steel to hardwood connection of the specimen was monitored by digital image correlation(DIC).DIC allowed identifying the onset of damage in the tensile tested joints near the interface of the composite layer and the steel-hardwood *** tensile and compression tested specimens failed due to significant peel strain concentration at the composite near the connection of steel and *** average strength of a specimen tested in compression was about 66%higher than the average strength of a specimen tested in *** strain concentration zone in the damaged specimen was away from the introduced saw *** a result the damaged and intact tensile specimens showed the same failure strength and *** specimens failed by adhesive failure between the composite-hardwood interface.

关键词： vinylester resin multi-material joint strain damage digital image correlation.

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阿育吠陀医学--被遗忘的历史

亚太传统医药 2017年第7期13卷 1-2页

作者： Yogini s.jaiswal Leonard L.Williams 北卡罗来纳州农业技术州立大学美国坎纳波利斯

阿育吠陀被认为是世界上最古老的医学体系之一,在这个神奇又神秘的医学体系中,还有许多智慧未被挖掘出来。世界上存在着许多种传统医学体系,不同传统医学体系的交融可为草药医学的发展带来新的契机。而目前,人们缺乏对传统医学体系间相... 详细信息

阿育吠陀被认为是世界上最古老的医学体系之一,在这个神奇又神秘的医学体系中,还有许多智慧未被挖掘出来。世界上存在着许多种传统医学体系,不同传统医学体系的交融可为草药医学的发展带来新的契机。而目前,人们缺乏对传统医学体系间相似性和差异性的理解,导致融合出现障碍。拟阐述阿育吠陀医学的古老历史和基本准则,以期帮助学者、研究人员和行医者更加深刻地了解传统医学体系,进而使阿育吠陀医学与其他传统医学体系之间求同存异,克服障碍,获得全球的认可和相互和谐共存。

关键词：阿育吠陀自然疗法顺势疗法

Reply to Discussion on “A generalized three-dimensional failure criterion for rock masses”

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第5期5卷 417-418页

作者： Ashok jaiswal B.K.shrivastva Department of Mining Engineering Indian Institute of Technology (Banaras Hindu University)

General:jaiswal and shrivastva(2012)proposed the mathematical formulations,*** J–s criterion for converting generalized H-B failure criterion into 3D smooth convex failure criterion at deviatoric *** J–s strength criterion is in two versions:uniform and variable extension *** has been observed from the analysis that at uniform extension ratio,the required strength parameters are only UCs and m(other parameters such as Ls,a,b and c are related with m).In the case of variable extension ratio,extra parameter f is required along with UCs and ***,it has minimal strength parameters compared to You strength ***,You strength criterion does not obey the smooth convex condition at deviatoric plane.

关键词： Reply to Discussion on A generalized three-dimensional failure criterion for rock masses rock