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Applied Mathematics and Mechanics(English Edition) 2018年第5期39卷 623-638页

作者： V.NAGENDRAMMA c.s.k.raju B.MALLIkARJUNA s.A.sHEHZAD A.LEELARATHNAM Department of Mathematics SPMVV University Department of Mathematics GITAM University Department of Mathematics BMS College of Engineering Department of Mathematics COMSATS Institute of Information Technology

A mathematical model is proposed to execute the features of the non-uniform heat source or sink in the chemically reacting magnetohydrodynamic （MHD） casson fluid across a slendering sheet in the presence of microorganisms and cattaneo-christov heat flux. Multiple slips （diffusion, thermal, and momentum slips） are applied in the modeling of the heat and mass transport processes. The Runge-kutta based shooting method is used to find the solutions. Numerical simulation is carried out for various values of the physical constraints when the casson index parameter is positive, negative, or infinite with the aid of plots. The coefficients of the skin factors, the local Nusselt number, and the sherwood number are estimated for different parameters, and discussed for engineering interest. It is found that the gyrotactic microorganisms are greatly encouraged when the dimensionless parameters increase, especially when the casson fluid parameter is negative. It is worth mentioning that th~ velocity profiles when the casson fluid parameter is positive are higher than those when the casson fluid parameter is negative or infinite, whereas the temperature and concentration fields show exactly opposite phenomena.

关键词： microorganisms multiple slip casson fluid cattaneo-christov heat flux,slendering sheet

Hydromagnetic unsteady slip stagnation flow of nanofluid with suspension of mixed bio-convection

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Propulsion and Power Research 2019年第4期8卷 362-372页

作者： R.kumar s.sood c.s.k.raju s.A.shehzad Department of Mathematics Central University of Himachal PardeshDharamshala176215India Department of Mathematics GITAM UniversityBangalore562163KarnatakaIndia Department of Mathematics COMSATS Institute of Information TechnologySahiwal57000Pakistan

In this paper,stagnation point region(suspended with nanofluid and microorganisms)is examined subjected to velocity and thermal *** flow is assumed to be flowing across an exponentially stretching flat surface under magnetic field *** transport equations(framed under Buongiorno’s model)are converted into self-similar form through suitable unsteady exponential similarity transformations which are then solved by employing implicit finite difference scheme(IFDs)known as keller-box method(kBM).A parametric analysis is performed along with limited details of *** of pertinent constraints on local skin friction,local Nusselt number,local sherwood number and local density number of micro-organisms are also uncovered through graphs.A significant decrease in skin-friction coefficients has been detected with respect to thermal slip in comparison to velocity slip.

关键词： Unsteady flow stagnation point region Mixed convection Microorganisms Nanoparticles slip regime keller-box scheme

Nonlinear Thermal Buoyancy on Ferromagnetic Liquid stream Over a Radiated Elastic surface with Non Fourier Heat Flux

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computer Modeling in Engineering & sciences 2021年第2期126卷 599-616页

作者： T.k.sreelakshmi Abraham Annamma A.s.chethan M.krishna Murthy c.s.k.raju Department of Mathematics BMS Institute of Technology and ManagementBengaluru560064India Department of Mathematics School of Applied SciencesREVA UniversityBengaluru560064India Department of Mathematics GITAM School of ScienceGITAM Deemed to be UniversityBengaluru562163India

The current article discusses the heat transfer characteristics of ferromagnetic liquid over an elastic surface with the thermal radiation and non-Fourier heat *** most of the existing studies,the heat flux is considered as constant,but whereas we incorporated the non-Fourier flux to get the exact performance of the ***,we excluded the PWT and PHF cases to control the boundary layer of the *** governing equations related to our contemplate are changed into non-linear ordinary differential equations(ODE’s)by utilizing appropriate similarity changes,which are at the point enlightened by Runge–kutta based shooting *** equations are broken down concerning boundary conditions and to be explained prescribed wall temperature(PWT)and prescribed heat flux(PHF)*** impacts of diverse non-dimensional physical parameters on velocity and temperature profiles are laid out ***,the assortment of skin friction and local Nusselt number for both PWT and PHF cases for various assessments of non-dimensional parameters have been sorted *** the wrap-up of the examination,we suspect that the friction factor coefficient is higher in the PWT case compared to the PHF *** result helps to conclude that the flux conditions are useful for cooling applications.

关键词： Ferromagnetic liquid nonlinear thermal buoyancy non-Fourier heat flux radiated elastic surface

Thermo-diffusion impact on immiscible flow characteristics of convectively heated vertical two-layered Baffle saturated porous channels in a suspension of nanoparticles:an analytical study

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Applied Mathematics and Mechanics(English Edition) 2023年第2期44卷 307-324页

作者： s.P.V.ANANTH B.N.HANUMAGOWDA s.V.k.VARMA c.s.k.raju I.kHAN P.RANA Department of Mathematics School of Applied SciencesREVA UniversityBangalore 560064India Department of Mathematics GITAM School of ScienceGITAM UniversityBangalore 562163India Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah 11952Saudi Arabia school of Mathematical sciences College of Science and TechnologyWenzhou-Kean UniversityWenzhou 325060Zhejiang ProvinceChina

The heat and mass transfer of two immiscible fluids in an inclined channel with thermal diffusion,vicious,and Darcy dissipation is *** first region consists of a clear fluid,and the second one is filled with a nanofluid saturated with a porous *** behaviors of cu-H_(2)O,In-H_(2)O,and Au-H_(2)O nanofluids are *** transport properties are assumed to be *** coupled non-linear equations of the flow model are transformed into the dimensionless form,and the solutions for the velocity,temperature,and concentration are obtained by the regular perturbation *** are carried out on the flow characteristics for various values of the material *** results show that the velocity and temperature of the fluids enhance with the thermal Grashof number,solutal Grashof number,and Brinkman number while decrease with the porosity parameter and solid volume fraction.

关键词： viscous fluid nanofluid heat and mass transfer thermal diffusion

Entropy generation minimization in the carreau nanofluid flow over a convectively heated inclined plate with quadratic thermal radiation and chemical reaction:A stefan blowing application

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Propulsion and Power Research 2024年第2期13卷 233-244页

作者： B.Lavanya J.Girish kumar M.Jayachandra Babu c.s.k.raju Bander Almutairi Nehad Ali shah Department of Mathematics Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka 576104India Department of Mathematics S.V.A Government CollegeSrikalahasti 517644India Department of Mathematics GITAM School of Science(GSS)GITAMBangaloreKarnatakaIndia Department of Mathematics College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Mechanical Engineering Sejong UniversitySeoul 05006South Korea

Entropy analysis can help to identify the sources of entropy generation in a heat transfer process more accurately than other methods,such as energy efficiency *** is because entropy analysis takes into account the quality of energy as well as its ***-nofluids have already been shown to have superior heat transfer characteristics compared to *** blowing can further enhance the heat transfer capabilities of nano-fluids by increasing the massflux and turbulence at the *** can be beneficial in a wide range of applications,such as heat exchangers,electronic cooling,and solar energy *** convective boundary condition accounts for heat transfer effects,influencing temperature distribution and the thermal boundary *** on the direction of heat transfer,the convective boundary condition can induce cooling or heating effects on the inclined *** has practical implications for various engineering applications,such as the cooling of electronic devices or heating in industrial *** nanofluids have a wide range of potential applications in heat transfer,energy storage,drug delivery,and food *** research investigates how the presence of stefan blowing affects the properties of carreau nanofluid flow across a convectively heated tilted *** and mass transport phenomena are studied using quadratic thermal radiation and chemical reaction *** mathematical model for this work is based on the Buongiorno *** governing equations are converted into a system of ordinary differential equations and then solved using the bvp4c *** parameters such as the mass transfer rate can be visualized using bar *** study’s primary findings are that when the Weissenberg number increases,the velocity rises and the concentration profile declines due to Brownian *** is discovered that,when 0.5≤γ≤3(the inverse porosity parameter),the friction factor declines by 0

关键词： Thermal radiation BVP4c stefan blowing Biot number Brownian motion Irreversibilit

Analytical analysis of inclined three-layered composite channel with cobalt ferrite nanoparticles and Hall current in Darcy medium

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Propulsion and Power Research 2023年第4期12卷 523-538页

作者： P.V.Ananth subray B.N.Hanumagowda c.s.k.raju s.V.k.Varma Prakash Jagdish se-Jin Yook Nehad Ali shah Department of Mathematics School of Applied SciencesREVA UniversityBengaluruKarnatakaIndia school of Mechanical Engineering Hanyang University222 Wangsimni-roSeongdong-guSeoul 04763Republic of Korea Department of Mechanical Engineering science Faculty of Engineering&The Built EnvironmentUniversity of JohannesburgSouth Africa Department of Mechanical Engineering Sejong UniversitySeoul 05006Republic of Korea

The present study explores the influence of electromagnetic effects on the flow of a nanofluid in a saturated permeable medium,confined between a clear viscous fluid in an inclined *** nanofluid consists of cobalt ferrite nanoparticles dispersed in ethylene *** governing equations are derived considering Darcy's law for the permeable medium and Tiwari's model for fluids containing nano-sized ***,radiation and dissipation effects are incorporated into the energy *** equations are transformed into dimensionless form and solved analytically using the perturbation *** results are analyzed through graphs and tables for different material *** findings reveal that higher electric and magnetic strengths have a significant impact on the fluid velocity at the interface of the two fluids,resulting in reduced shear both at the clear fluid surface and the interface between *** highlights the crucial role played by electric and magnetic strengths in modifying flow ***,combining electric and magnetic strengths with nanofluids can be utilized to achieve desired qualities in multi-fluid flow and enhance heat transfer characteristics.

关键词： Three-layered flow Inclined composite channel Electromagnetic field Nanofluid Porous region

The myth of “minima” and “maxima”,the species of Physalis in the Indian subcontinent

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植物分类学报 2007年第2期45卷 239-245页

作者： Vatsavaya s raju c s REDDY k G RAJARAO Department of Botany Kakatiya UniversityWarangal 506009 India Forestry & Ecology Division National Remote Sensing AgencyHyderabad 500008 India Department of Botany Andhra UniversityWaltair 530003 India

The status of the names, Physalis minima L. and P. maxima Mill. (solanaceae), and their alleged presence on the Indian subcontinent are discussed. The issues of nativity and identity of Linnaean Physalis minima are long-debated while the use of the name P. maxima Mill. and its report from India are recent. The available evidence indicates that the name "P. minima L." is misapplied to two different elements, viz., P. angulata L. and P. lagascae Roem. & schult. The name Physalis minima L. may be rejected as nomen confusum, for which the paper provides the primary information. As on today, it is submerged under the synonymy of P. angulata L. The correct name for the widely known P. minima is P. lagascae. The name "P. maxima Mill." applied to the escape and naturalized weed in the Indian subcontinent and elsewhere is to be substituted by P. pruinosa L., a name misapplied to P. grisea (Waterf.) M. Martínez.

关键词：酸浆属植物酸浆值植物分类植物命名

Effect of wall temperature modulation on the heat transfer characteristics of droplet-train flow inside a rectangular microchannel

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chinese Journal of chemical Engineering 2020年第3期28卷 685-697页

作者： Vivekanand s.V.B.,raju V.R.k. Department of Mechanical Engineering National Institute of TechnologyWarangalTelangana 506004India

The numerical studies of water–oil two-phase slug flow inside a two-dimensional vertical microchannel subjected to modulated wall temperature boundary conditions have been discussed in the present *** researchers have contributed their efforts in exploring the characteristics of Taylor flows inside microchannel under constant wall heat flux or isothermal wall ***,there is no study available in the literature which discusses the impact of modulated thermal wall boundary conditions on the heat transfer behavior of slug flows inside ***,to bridge this gap,an effort has been made to understand the heat transfer characteristics of the flow under sinusoidal wall temperature ***,a single phase flow and heat transfer study was performed in microchannels,and the results of the fully developed velocity profile and heat transfer rate were validated with benchmark analytical *** an optimal selection of the combination of sinusoidal thermal wall boundary conditions has been made for the two-phase slug flow ***,the effects of amplitude(0 bεb 0.03)and frequency(0 bωb 750πrad·s-1)of the sinusoidal wall temperature profile on the heat transfer have been studied using the optimal combination of the wall boundary *** results of the numerical study using modulated temperature conditions on channel walls showed a significant improvement in the heat transfer over liquid-only flow by approximately 50%as well as over two-phase flow without wall temperature *** non-dimensional temperature contours obtained for different cases of temperature modulation clearly explain the root cause of such improvement in the heat ***,the results based on the hydrodynamics of the flow have also been reported in terms of variation of droplet shapes and film *** influence of capillary number on the film thickness as well as heat transfer rates has also been *** addition,the measured fil

关键词： Heat transfer Microchannel Modulation surface tension Taylor flow

Hydrothermal Hgbomite Associated with Vanadiferous-Titaniferous(V-Ti) Bearing Magnetite Bands in Bhakatarhalli chromite Mine, Nuggihalli Greenstone Belt, Western Dharwar craton, karnataka, India

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Acta Geologica sinica(English Edition) 2014年第3期88卷 845-853页

作者： raju V.s.PERUMALA Roland k.W.MERkLE National Geophysical Research Institute PO Box 724 Hyderabad India (Council of Scientific and Industrial Research) Department of Geology University of Pretoria

Hogbomite,a rare exotic mineral,is found to be associated with the vanadiferous-titaniferous （V-Ti） bearing magnetite bands at Bhakatarhalli,Nuggihaifi greenstone belt,western Dharwar craton,*** report on a second occurrence of hogbomite from the Dharwar craton in karnataka,which is the sixth documented occurrence of this mineral from *** evaluate the chemical characteristics of hogbomite and associated Fe-Ti-minerals in an attempt to identify its formation as a primary hydrothermal mineral in a metamorphosed magnetite *** report here the presence of hogbomite as a complex oxide of Fe,Mg,Al and Ti with accessory of Zn,V and *** studies suggest the （V-Ti） bearing magnetite （Mt） contain spinel,hogbomite,chlorite,martite,ilmenite （Ⅱ） and minor amounts of *** hogbomite displays euhedral to subhedral textures,and is up to 250 μm along the grain boundaries of magnetite and *** the samples studied,hogbomite is prismatic,irregular and elongated in *** genesis of hogbomite in veins between magnetite and ilmenite implies its precipitation from fluids without involving complicated *** models were proposed for the formation of hogbomite; however,the subject is still debatable.

关键词： Hogbomite western Dharwar craton vanadium magnetite EPMA India

study of deposition of fine sediment within the pores of a coarse sediment bed stream

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International Journal of sediment Research 2013年第2期28卷 210-219页

作者： N.k.kHULLAR U.c.kOTHYARI k.G.Ranga raju Department of civil Engineering PAU Ludhiana-India Prof.Dr. Department of civil Engineering IIT Roorkee-India Prof.Dr. Department of civil Engineering IIT Roorkee-India Formerly Prof.Dr.

Elaborate experiments were performed in a 30 m long,0.5 m deep and 0.2 m wide laboratory flume to study the process of infiltration of fine sediment into the pores of coarse sediment forming the channel bed *** concentrations of suspended load of fine sediment of size 0.064 mm were passed over the channel bed made up of three different types of coarse sediments;two uniform and one *** proportion of fine sediment infiltrated into the pores of bed material for each equilibrium concentration of suspended load of fine sediment in the flow was studied during several experimental *** proportion of fine sediment within the pores of bed material increased with an increase in the equilibrium concentration of suspended load of fine sediment in the *** process continued till the pores within the coarse sediment bed were filled up to the capacity with the fine sediment transported by the flow in *** theoretical value was identified for limit for maximum proportion of fine sediment that can be present within the pores of bed *** further increase in the concentration of suspended load of fine sediment in the flow,deposition of fine sediment occurs on the surface of the flume bed in the form of ripples of the fine *** condition is defined as ’depositional condition’.Experimental observations on these and related aspects are presented herein.

关键词： Fine sediment Flume experiment Bed material concentration of suspended sediment Deposition condition