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Predictor-corrector FDm analysis of mHD Darcy-Forchheimer flow of a micropolar fluid with viscous dissipation and heterogeneous-homogeneous

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Propulsion and Power Research 2024年第2期13卷 257-272页

作者： D.Thenmozhi m.eswara rao Department of mathematics Saveetha School of EngineeringSIMATSChennaiTamilnaduIndia

This research delves into an intricate exploration offluid dynamics within heat transfer systems,with a specific focus on enhancing our understanding and improving system *** a sophisticated mathematical model,the study incorporates micropolarfluid dynamics,micro rotational effects,laminarflow characterized by the Darcy-Forchheimer model,inertia effects,and chemical reactions within a heat transfer system featuring boundary layer *** mathematical framework consists of partial differential equations(PDEs),and the study utilizes advanced numerical techniques,including the(PC4-FDm)Predictor-Corrector Finite Difference method and the shooting method,to solve these govern-ing *** inclusion of quantized mesh points and analysis of convergence using 4th orderfinite difference methods enhances the precision of the obtained *** param-eters are scrutinized to draw meaningful *** heterogeneous parameter reveals an increasing trend influid concentration,while the homogeneous parameter indicates a collision effect leading to a decrease influid *** Eckert number,associated with viscous dissipation,exhibits a correlation with decreasedfluid temperature and increasedfluid *** rotation parameters suggest a parallel increase influid velocity and a marginal decrease influid ***,the Darcy-Forchheimer parameter,reflective of inertial effects,showcases an increase influid temperature and decrease in velocity in the convection *** the industrial implications,the study underscores the significance of convection heat transfer systems in the context of *** offer valuable insights for optimizing heating and cooling processes in diverse industrial applications,ranging from power plants to waste heat recovery units and pharmaceutical industries.

关键词： Predictor-corrector micropolarfluid magnetohydrodynamics(mHD) Viscous dissipation Homogeneous-heterogeneous

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甘蔗糖厂废水和污染的管理

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甘蔗糖业 1981年第4期 54-55页

作者： m.eswara rao 文国珊刘让文

印度甘蔗糖厂的废水是主要有机工业废水之一。废水中有大量悬浮物、油和润滑脂等,生物需氧量(BOD)大,因而具有很大的污染性。防止污染的措施是;(1)在甘蔗破碎处设置接受喷溅汁的容器;(2)洗滤布水用石灰水处理后,沉降8小时;(3)溢出的糖... 详细信息

印度甘蔗糖厂的废水是主要有机工业废水之一。废水中有大量悬浮物、油和润滑脂等,生物需氧量(BOD)大,因而具有很大的污染性。防止污染的措施是;(1)在甘蔗破碎处设置接受喷溅汁的容器;(2)洗滤布水用石灰水处理后,沉降8小时;(3)溢出的糖蜜和糖的再回收;(4)地面保持清洁,(5)蒸发罐和煮糖罐负荷适当;(6)加强喷水池废水的管理;(7)车间保持洁净。

关键词：印度南亚甘蔗糖厂 BOD

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Implementation of FPGA Based mPPT Techniques for Grid-Connected PV System

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Intelligent Automation & Soft Computing 2023年第2期35卷 1783-1798页

作者： Thamatapu eswara rao S.Elango Department of Electrical and Electronics Engineering Coimbatore Institute of TechnologyCoimbatoreIndia

Global energy demand is growing rapidly owing to industrial growth and *** energy sources are driven by limited reserves and rapid depletion of conventional energy sources(e.g.,fossil fuels).Solar photovol-taic(PV),as a source of electricity,has grown in popularity over the last few dec-ades because of their clean,noise-free,low-maintenance,and abundant availability of solar *** are two types of maximum power point track-ing(mPPT)techniques:classical and evolutionary algorithm-based *** and less complex perturb and observe(P&O)and incremental conduc-tance(INC)approaches are extensively employed among classical *** study used aﬁeld-programmable gate array(FPGA)-based hardware arrange-ment for a grid-connected photovoltaic(PV)*** PV panels,mPPT con-trollers,and battery management systems are all components of the proposed *** the developed hardware prototype,various modes of operation of the grid-connected PV system were examined using P&O and incremental con-ductance mPPT approaches.

关键词： Grid connected PV system perturb and observe(P&O) incremental mPPT boost converter battery

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e-FILTERS OF mS-ALGEBRAS

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Acta mathematica Scientia 2013年第3期33卷 738-746页

作者： m. Sambasiva rao Department of mathematics M.V.G.R. College of EngineeringChintalavalasa Vizianagaram Andhra Pradesh India-535005

The notion of e-filters is introduced in an mS-algebra and characterized. The concept of D-filters is introduced and a set of equivalent conditions under which every D-filter is an e-filter are given. The properties of the space of all prime e-filters of an mS-algebra are observed. The concept of D-prime filters is introduced and then a set of equivalent conditions axe derived for a prime e-filter to become a D-prime filter in topological terms.

关键词： mS-algebra e-filter dense element D-filter D-prime filter minimal prime filter Hausdorff space

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Thermoluminescence study of rare earth ion (Dy^(3+)) doped LiF:mg crystals grown by EFG technique

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Journal of Rare Earths 2012年第7期30卷 641-646页

作者： Pooja Seth Shruti Aggarwal S m rao University School of Basic and Applied Science Guru Gobind Singh Indraprastha University Department of Physics Punjabi University

This work describes investigation of radiation dosimetry characteristics of magnesium （mg） doped lithium fluoride （LiF） crystals co-doped with different concentrations of dysprosium （Dy）. These crystals were grown by edge defined film fed crystal growth （EFG） tech- nique. Thermoluminescence （TL） measurements were made on as grown （AG） and annealed （AN） crystals after they were irradiated with a gamma dose of 15 Gy. The influence and advantage of optimized Dy^3＋ concentration in enhancing the thermoluminescence （TL） properties of LiF：mg samples were discussed. The normalized peak height of the annealed crystals was nearly 3 times that of the as grown crystals for the particular concentration samples irradiated with Co6~ gamma source showed linearity up to 10 Gy. Thermoluminescence signal observed over a period of one month showed negligible fading. Thermoluminescence glow curve structure of optimized phosphor remained stable for higher doses of gamma rays of 103 Gy. Glow curve was analyzed using computer glow curve deconvolution （CGCD） method and trapping parame- ters were calculated.

关键词： thermoluminescenea rare earth ions annealing edge defined film fed growth technique

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Improvement in the dissolution rate and tableting properties of cefuroxime axetil by melt-granulated dispersion and surface adsorption

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Acta Pharmaceutica Sinica B 2013年第2期3卷 113-122页

作者： Jammula Sruti Chinam Niranjan Patra Suryakanta Swain Kanhu Charan Panigrahi Allupati Premananda Patro Sarwar Beg Subas Chandra Dinda muddana eswara Bhanoji rao Department of Pharmaceutics Roland Institute of Pharmaceutical SciencesBerhampur 760010India School of Pharmaceutical Education and Research Berhampur UniversityBerhampur 760007India

A combination of melt-granulated dispersion and surface adsorption techniques was used to enhance the dissolution and tableting properties of cefuroxime axetil(CA).Gelucire 50/13 was used as the melt-dispersion carrier and Sylysia 350 was used to adsorb the melt *** studies showed an 8-fold increase in solubility at a ratio of 1:1.5 for CA:Gelucire 50/*** minimum quantity of Sylysia 350 required to achieve the desired flowability and compressibility was 0.5 parts of Sylysia 350 per unit of Gelucire 50/*** solubility studies showed negative ΔG_(tr)^(0) values for Gelucire 50/13 at various concentrations(2-10%,vv/v),indicating the spontaneous nature of ***-IR and DSC spectra exhibited drug-excipient *** modeling by a computational method employing energy minimization revealed entrapment of CA in Gelucire 50/*** total potential energy of CA(70.562 keal/mol)was reduced to 33.578 keal/mol after solid dispersion with Gelucire 50/13.P-XRD studies indicated that the presence of Sylysia 350 is less likely to promote the reversion of the amorphous CA to a crystalline *** vitro dissolution studies demonstrated an improved dissolution rate,and drug release at 15 min(Q_(15min))exhibited a 15-fold *** rapidly dissolving CA tablets showed improved dissolution with improved tableting properties.

关键词： molecular modeling Gelucire 50/13 Sylysia 350 microbiological assay Rapidly dissolving tablet

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Erosion corrosion control of 6061 aluminum alloy in multi-phase jet impingement conditions with eco-friendly green inhibitor

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Chinese Journal of Chemical Engineering 2020年第2期28卷 340-347页

作者： m.Lavanya V.Ramachandra murthy Padmalatha rao Department of Biotechnology Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnatakaIndia Department of Chemistry Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnatakaIndia

Erosion corrosion performance of 6061 aluminum alloy in simulated sea water slurry was investigated under multi-phase jet impingement conditions. The main objective of the work is to study erosion–corrosion of a material with engineering application and mitigate it using eco-friendly green inhibitor. Experiments were performed with the sand concentration of 0.3% and 0.3 μm size. The effect of temperature and flow rate on the performance of inhibitor was explored. Electrochemical methods were adopted for erosion-corrosion measurements. Experiments revealed that starch could mitigate erosion-corrosion with a maximum reduction efficiency of 58% at temperature of 303 K and flow rate of 4 L·min–1. Inhibition efficiency decreased with increase in flowrate and temperature. EIS spectrum demonstrated that the corrosion process in the presence on inhibitor was both charge transfer and mass transfer controlled. A key role of hydrodynamics in the performance of corrosion inhibitor was confirmed by the present study.

关键词： Erosion-corrosion Green-inhibitor Electrochemical studies Aluminum alloy Simulated sea water

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Preyminary Investigations on the Global Summer monsoonal Drought mechanics and the Latitudinal Teleconnections

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Advances in Atmospheric Sciences 1990年第3期7卷 261-274页

作者： m.Sankar-rao Department of Aerospace Engineering & Centre for Atmospheric Sciences Indian Institute of Science Bangalore Indiahe question of possible teleconnections between the middle latitude general circulation and the Indian south-west monsoon was investigated in this paper. Within the framework of a simple model it was shown that there can exist such an interaction via the ultra-long Rossby waves.

The question of possible teleconnections between the middle latitude general circulation and the Indian south-west monsoon was investigated in this paper. Within the framework of a simple model it was shown that there... 详细信息

关键词： over Preyminary Investigations on the Global Summer monsoonal Drought mechanics and the Latitudinal Teleconnections

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Cell-like-carbon-micro-spheres for robust potassium anode

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National Science Review 2021年第9期8卷 68-76页

作者： Hongbo Ding Jiang Zhou Apparao m.rao Bingan Lu School of Physics and Electronics State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University School of materials Science and Engineering and Key Laboratory of Nonferrous metal materials Science and Engineering Ministry of Education Central South University Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Fujian Strait Research Institute of Industrial Graphene Technologies

Large-scale low-cost synthesis methods for potassium ion battery(PIB) anodes with long cycle life and high capacity have remained challenging. Here, inspired by the structure of a biological cell, biomimetic carbon cells(BCCs) were synthesized and used as PIB anodes. The protruding carbon nanotubes across the BCC wall mimicked the ion-transporting channels present in the cell membrane, and enhanced the rate performance of PIBs. In addition, the robust carbon shell of the BCC could protect its overall structure, and the open space inside the BCC could accommodate the volume changes caused by K+insertion, which greatly improved the stability of PIBs. For the first time, a stable solid electrolyte interphase layer is formed on the surface of amorphous carbon. Collectively, the unique structural characteristics of the BCCs resulted in PIBs that showed a high reversible capacity(302 m Ah g-1at 100 m A g-1and 248 mAh g-1at500 m A g-1), excellent cycle stability(reversible capacity of 226 m Ah g-1after 2100 cycles and a continuous running time of more than 15 months at a current density of 100 m A g-1), and an excellent rate performance(160 mAh g-1at 1 A g-1). This study represents a new strategy for boosting battery performance, and could pave the way for the next generation of battery-powered applications.

关键词： bionic structures potassium ion battery reversible capacity term stability rate performance

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Switching angle optimization and fault analysis of a multistring-multilevel inverter for renewable-energy-source applications

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Clean Energy 2022年第6期6卷 907-930页

作者： Savitha m S.Nagaraja rao mS Ramaiah University of Applied Sciences Department of Electrical EngineeringBangaloreIndia

In this paper,a multistring-multilevel inverter(m-mLI)for renewable-energy-source applications has been proposed with reduced switch count and harmonics along with single-switch fault analysis for various *** requires only‘m+1’power switches for‘m’voltage *** proposed work achieves the fine-tuning of switching angles using a metaheuristic technique,*** teaching-learning-based optimization algorithm(TLBOA),to mitigate the total harmonic distortion(THD)of the ***,the proposed TLBOA has been compared with conventional modulation techniques such as equal phase(EP),half-equal phase(HEP),near-level control(NLC)and Newton-Raphson(NR)to verify the effectiveness of TLBOA for various voltage levels in terms of%voltage-THD(%V-THD),computational time and *** fine-tuning the switching angles,the%V-THD is improved significantly when compared with EP,HEP,NLC and NR modulation *** an 11-level single-phase m-mLI,the%V-THD using TLBOA at 0.91 modulation index(mI)is 5.051%.The lower-order harmonics,i.e.5,7,11 and 13,are eliminated to improve the power ***,mLIs are often prone to failure,resulting in waveform *** extreme reduction in power quality impacts the load and significant damage is *** location of the open-circuit fault to be identified becomes more tedious under the faulty conditions with increased switch counts and voltage levels since the mathematical modelling fails to address the scenario in less computational ***,the machine-learning approach,*** vector machine(SVm)with Bayesian optimization,has been discussed to locate the faulty ***,the proposed m-mLI configuration has been modelled,simulated and validated using mATLAB®and Simulink®.The results of the m-mLI configuration have been verified for 7,9 and 11 levels using TLBOA along with fault analysis using the SVm approach.

关键词： TLBO fault resilience multistring-multilevel inverters renewable-energy applications

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