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Communications in Theoretical Physics 2021年第4期73卷 9-20页

作者： M Gnaneswara Reddy Naveen kumar R B C Prasannakumara N G Rudraswamy k ganesh kumar Department of Mathematics Acharya Nagarjuna University CampusOngole-523001India Department of Studies and Research in Mathematics Davangere UniversityShivagangothriDavangere-577007KarnatakaIndia Department of Mathematics P.C.Jabin Science CollageHubballi-580031India

This research work explores the effect of hybrid nanoparticles on the flow over a rotating disk by using an activation energy ***,we considered molybdenum disulfide and ferro sulfate as nanoparticles suspended in base fluid *** magnetic field is pragmatic normal to the hybrid nanofluid flow *** derived nonlinear ordinary differential equations are non-dimensionalized and worked out numerically with the help of Maple software by the RkF-45 *** scientific results for a non-dimensionalized equation are presented for both nanoparticle and hybrid nanoparticle *** of various predominant restrictions on flow and thermal fields are *** estimation for friction factor,local Nusselt number and Sherwood number are also *** reveal that the reduction of the heat transfer rate is greater in hybrid nanoparticles when compared to nanoparticles for increasing values of Eckert Number and the thermal field enhances for the enhanced values of volume fraction.

关键词： porous medium MHD hybrid nanoparticles activation energy

MHD Flow and Nonlinear Thermal Radiative Heat Transfer of Dusty Prandtl Fluid over a Stretching Sheet

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Fluid Dynamics & Materials Processing 2020年第2期16卷 131-146页

作者： k.ganesh kumar S.Manjunatha N.G.Rudraswamy Department of Mathematics SJM Institute of TechnologyChitradurga577502India Department of Engineering Mathematics Faculty of EngineeringChrist UniversityBengaluru560074India Department of Studies and Research in Mathematics Kuvempu UniversityShimoga577451India

Boundary layer flows and melting heat transfer of a Prandtl fluid over a stretching surface in the presence of fluid particle suspensions has been *** converted set of boundary layer equations are solved numerically by RkF-45 *** numerical results for flow and heat transfer characteristics are deliberated for various physical ***,the skin friction coefficient and Nusselt number are also presented in Tabs.2 and *** is found that the heat transfer rates are advanced in occurrence of nonlinear radiation compered to linear ***,it is noticed that velocity and temperature profile increases by increasing Prandtl parameter.

关键词： Prandtl fluid melting effect dusty fluid nonlinear radiation

Characterization of magnetically impelled arc butt welded T11 tubes for high pressure applications

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Defence Technology（防务技术） 2015年第3期11卷 244-254页

作者： R.SIVASANkARI V.BALUSAMY P.R.VENkATESWARAN G.BUVANASHEkARAN k.ganesh kumar Department of Metallurgical Engineering PSG College of Engineering Welding Research Institute Bharat Heavy Electricals Limited

Magnetically impelled arc butt(MIAB) welding is a pressure welding process used for joining of pipes and tubes with an external magnetic field affecting arc rotation along the tube circumference. In this work, MIAB welding of low alloy steel(T11) tubes were carried out to study the microstructural changes occurring in thermo-mechanically affected zone(TMAZ). To qualify the process for the welding applications where pressure could be up to 300 bar, the MIAB welds are studied with variations of arc current and arc rotation time. It is found that TMAZ shows higher hardness than that in base metal and displays higher weld tensile strength and ductility due to bainitic transformation. The effect of arc current on the weld interface is also detailed and is found to be defect free at higher values of arc currents. The results reveal that MIAB welded samples exhibits good structural property correlation for high pressure applications with an added benefit of enhanced productivity at lower *** study will enable the use of MIAB welding for high pressure applications in power and defence sectors.

关键词：磁控电弧磁场影响高压力应用压力焊接特性对焊驱动

Performance assessment of prefabricated vertical drains in mitigating soil reliquefaction subjected to repeated seismic events using shaking table experiments

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Frontiers of Structural and Civil Engineering 2024年第3期18卷 411-427页

作者： Gowtham PADMANABHAN ganesh kumar SHANMUGAM Department of Earthquake Engineering Indian Institute of Technology RoorkeeUttarakhand 247667India Geotechnical Engineering Division CSIR-Central Building Research Institute Academy of Scientific and Innovative Research(AcSIR)Uttarakhand 247667India

The use of prefabricated vertical drains(PVD)in liquefiable deposits is gaining attention due to enhanced ***,investigations on PVD in mitigating re-liquefaction during repeated shaking events are not *** study performed a series of shaking table experiments on untreated and PVD-treated specimens prepared with 40%and 60%relative *** sinusoidal loading was applied with an incremental peak acceleration of 0.1g,0.2g,0.3g,and 0.4g,at 5 Hz shaking frequency with 40 s *** performance of treated ground was evaluated based on the generation and dissipation of excess pore water pressure(EPWP),induced sand densification,subsidence,and cyclic stress *** addition,the strain accumulated in fresh and exhumed PVD was investigated using geotextile tensile testing apparatus aided with digital image *** evidence of pore pressure was reported up to 0.2g peak acceleration for 40%and 60%relative density *** continuous occurrence of soil densification and drainage medium restrained and delayed the generation of EPWP and expedited the dissipation *** study demonstrates PVD can mitigate re-liquefaction,without suffering from deterioration,when subjected to medium to high intense repeated shaking events.

关键词： prefabricated vertical drains drainage re-liquefaction shaking table digital image correlation

Experimental studies on liquefaction and reliquefaction potential of saturated ground subjected to repeated incremental acceleration loading with varying shaking duration

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Earthquake Engineering and Engineering Vibration 2023年第4期22卷 909-920页

作者： Gowtham Padmanabhan ganesh kumar Shanmugam Department of Earthquake Engineering Indian Institute of Technology RoorkeeRoorkeeUttarakhand 247667India Geotechnical Engineering Division CSIR-Central Building Research InstituteAcademy of Scientific and Innovative Research(AcSIR)RoorkeeUttarakhand 247667India

Past research has focused on the factors that influence liquefaction under normal shaking ***,studies on parameters that influence the reliquefaction potential of saturated deposits during repeated shaking events are *** this study,an attempt has been made to examine the influence of acceleration amplitude and shaking duration on liquefaction and reliquefaction potential under repeated shaking conditions is conducted.1-g uni-axial shaking table experiments were performed on saturated ground prepared with 40%and 60%relative *** prepared ground was subjected to alternate longer and shorter shaking durations(40 and 20 s)of repeated incremental 0.1 g,0.2 g,0.3 g and 0.4 g acceleration loading,*** variation in density,excess pore water pressure(EPWP),cyclic resistance ratio(CRR)and surface settlement were *** results showed that due to repeated incremental shaking events,reliquefaction was observed on the prepared *** longer shaking duration,the post-liquefied soil showed density improvement with improved soil ***,the application of shorter duration loading followed by longer shaking reduced the beneficial effect of density improvement by disturbing the densified *** to this,the ground was found to be more susceptible to reliquefaction in the subsequent incremental longer shaking event.

关键词： 1g–shaking table reliquefaction acceleration amplitude shaking duration relative density

An overview of chemical enhanced oil recovery and its status in India

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Petroleum Science 2023年第4期20卷 2305-2323页

作者： ganesh kumar Pothula Rakesh kumar Vij Achinta Bera Department of Petroleum Engineering School of Energy TechnologyPandit Deendayal Energy UniversityGandhinagarGujarat382007India

India is currently producing crude oil from matured fields because of insufficient discoveries of new ***,in order to control the energy crisis in India,enhanced oil recovery(EOR)techniques are required to reduce the import of crude from the OPEC(Organization of the Petroleum Exporting Countries).This review mentions chemical EOR techniques(polymers,surfactants,alkali,nanoparticles,and combined alkali-surfactant-polymer flooding)and operations in *** EOR methods are one of the most efficient methods for oil *** efficiency is enhanced by interfacial tension(IFT)reduction using surfactants and alkali,and mobility control of injected water is done by adding a polymer to increase the volumetric sweep *** paper also reviews the current trend of chemical EOR,prospects of chemical EOR in Indian oilfields,the development of chemical EOR in India with their challenges raising with economics,and screening criteria for chemical EOR implementation on the field ***,the review gives a brief idea about chemical EOR implementation in Indian oilfields in future prospects to increase the additional oil recovery from existing depleted fields to reduce the import of crude *** outcome of this review depicts all chemical EOR operations and recovery rates both at the laboratory scale and field scale around the *** additional recovery rates are compared from various chemical EOR methods like conventional chemical flooding methods and conventional chemicals combined with nanoparticles on a laboratory *** development of chemical EOR in the past few decades and the EOR policy given by the government of India has been mentioned in this *** analysis provides an idea about enhanced recovery screening and implementation of chemical EOR methods in existing fields will significantly reduce the energy crisis in India.

关键词： Chemical enhanced oil recovery Surfactant flooding Polymer flooding Indian oilfields Enhanced oil recovery challenges in India Screening criteria

Extension of Distribution Transformer Life in the Presence of Smart Inverter-based Distributed Solar Photovoltaic Systems

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 88-95页

作者： kanhaiya kumar Saran Satsangi ganesh Balu kumbhar Department of Electrical and Electronics Engineering Motihari College of EngineeringMotihariBiharIndia Department of Electrical Engineering National Institute of Technology(NIT)PatnaPatnaBiharIndia Department of Electrical Engineering Indian Institute of Technology(IIT)RoorkeeRoorkeeUttarakhandIndia

A transformer is an essential but expensive power delivery equipment for a distribution *** many distribution utilities worldwide,a sizable percentage of transformers are near the end of their designed *** the same time,distribution utilities are adopting smart inverter-based distributed solar photovoltaic(SPV)systems to maximize renewable *** central objective of this paper is to propose a methodology to quantify the effect of smart inverter-based distributed SPV systems on the aging of distribution *** proposed method is first tested on a modified IEEE-123 node distribution *** that,the procedure is applied to a practical distribution system,i.e.,the Indian Institute of Technology(IIT)Roorkee campus,*** transformer aging models,alongside advanced control functionalities of grid-tied smart inverter-based SPV systems,are implemented in *** open-source simulation tool(OpenDSS)is used to model distribution *** analyze effectiveness of various inverter functionalities,time-series simulations are performed using exponential load models,considering daily load curves from multiple seasons,load types,current harmonics,*** show replacing a traditional inverter with a smart inverter-based SPV system can enable local reactive power generation and may extend the life of a distribution *** results demonstrate,simply by incorporating smart inverter-based SPV systems,transformer aging is reduced by 15%to 22%in comparison to SPV systems operating with traditional inverters.

关键词： Distribution transformer loss of life smart inverter functions solar photovoltaic systems thermal models Volt-VAr control

A review of conventional and renewable biodiesel production

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Chinese Journal of Chemical Engineering 2021年第12期34卷 1-17页

作者： P.Vignesh A.R.Pradeep kumar N.Shankar ganesh V.Jayaseelan k.Sudhakar Department of Mechanical Engineering Indira Institute of Engineering and TechnologyTiruvallurIndia Department of Mechanical Engineering Dhanalakshmi College of EngineeringChennaiIndia Department of Mechanical Engineering Kingston College of EngineeringVelloreIndia Department of Mechanical Engineering Prathyusha Engineering CollegeChennaiIndia Faculty of Mechanical and Automotive Engineering Technology Universiti Malaysia Pahang26600 PekanPahangMalaysia Automotive Engineering Centre Universiti Malaysia Pahang26600 PekanPahangMalaysia

The need for sustainable fuels has resulted in the production of renewables from a wide range of sources,in particular organic fats and *** use of biofuel is becoming more widespread as a result of environmental and economic *** efforts have been made to substitute fossil fuels with green *** molecules extracted from processed animal fats and organic plant materials are considered alternatives for the use in modern engine *** different methods have been adopted for converting esters in vegetable oils/animal fats into compounds consistent with petroleum products,namely the transesterification and the hydro-processing of ester bonds for the production of *** review paper primarily focuses on conventional and renewable biodiesel feedstocks,the catalyst used and reaction kinetics of the production process.

关键词： Biofuel Methy esters from fatly acids Renewable diesel kinetics Catalyst Transesterification

Energy Efficient Ambience Awake Routing with OpenFlow Approach

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Computers, Materials & Continua 2021年第5期67卷 2049-2059页

作者： Hima Bindu Valiveti SNV ganesh Budati Anil kumar Dileep kumar Yadav Department of ECE GRIETHyderabad500090India Department of EEE Avanthi Institute of Engineering and TechnologyVisakhapatnam535006India Department of CSE Galgotia’s UniversityNoida201310India

A major problem in networking has always been energy *** life is one parameter which could help improve Energy *** research on wireless networking stresses on reducing signaling messages or time required for data transfer for addressing energy consumption *** or Forwarding packets in a network between the network elements like routers,switches,wireless access points,etc.,is complex in conventional *** the advent of Software Defined Networking(SDN)for 5G network architectures,the distributed networking has embarked onto centralized networking,wherein the SDN Controller is responsible for decision *** controller pushes its decision onto the network elements with the help of a control plane protocol termed *** networks have been largely in use because of their ease in physical and logically setting the administrative *** centralized controller deals with the policy funding and the protocols used for routing procedures are designated by the decentralized *** Awake is a location centered routing protocol deployed in the 5G network architecture with OpenFlow *** Ambience Awake mechanism relies on the power consumption of the network elements during the packet transmission for unicast and multicast *** signalling load and the routing overhead witnessed an improvement of 30%during the routing *** proposed routing mechanism run on the top of the decentralized SDN controller proves to be 19.59%more efficient than the existing routing solutions.

关键词： Energy efficiency routing smart networks 5G software defined networking openflow

Cynodon dactylon extract ameliorates cognitive functions and cerebellar oxidative stress in whole body irradiated mice

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Asian Pacific Journal of Tropical Biomedicine 2019年第7期9卷 278-283页

作者： Roopesh Poojary Nayanatara Arun kumar Reshma kumarchandra Vinodini NA Bhagyalakshmi k ganesh Sanjeev Department of Physiology Kasturba Medical CollegeMangaloreManipal Academy of Higher EducationManipalKarnatakaIndia Department of Biochemistry Kasturba Medical CollegeMangaloreManipal Academy of Higher EducationManipalKarnatakaIndia Microtron Centre Department of Studies in PhysicsMangalore UniversityMangalagangotriKarnatakaIndia

Objective: To explore the effect of hydroalcoholic extract of Cynodon dactylon on the whole body radiation-induced oxidative status of the cerebellum and cognitive impairments in mice. Methods: Swiss albino mice were randomly divided into the control group, radiation control group, low dose and high dose Cynodon dactylon extract treated groups and pre-treated with Cynodon dactylon extract before irradiation. Cynodon dactylon extract was administered for 7 d daily in low dose(0.25 g/kg) and high dose(1 g/kg). On day 7, mice were irradiated with a sublethal dose of 5 Gy gamma rays. Motor coordination was assessed by elevated rotarod test and spatial memory was studied by water maze test. Subsequently, biochemical markers(glutathione, lipid peroxidation and nitric oxide levels) in the cerebellum were evaluated. Results: The gamma irradiated group showed significant impairment in motor coordination and spatial memory compared to normal mice. Mice treated by Cynodon dactylon extract prior to gamma radiation showed good improvement in both paradigms compared to the radiation control group. Moreover, glutathione level was increased, while lipid peroxidation and nitric oxide levels were significantly reduced in mice receiving low dose and high dose of Cynodon dactylon extract compared to the radiation control group. Conclusions: The present study suggests the neuroprotective role of Cynodon dactylon against radiation-induced cognitive impairment and oxidative stress on the cerebellum of mice.

关键词： Cerebellum Radiation Cognition Cynodon dactylon Memory