Research Papers/Topics in Mechanical Engineering

Nonlinear Vibrations of a Single-walled Carbon Nanotube for Delivering of Nanoparticles

The capability of carbon nanotubes (CNTs) in efficient transporting of drug molecules into the biological cells has been the focus of attention of various scientific disciplines during the past decade. From applied mechanics points of view, translocation of a nanoparticle inside the pore of a CNT would result in vibrations. The true understanding of the interactive forces between the moving nanoparticle and the inner surface of the CNT is a vital step in factual realization of such vibrations...

Revisiting Free Transverse Vibration of Embedded Single-layer Graphene Sheets Acted Upon by an in-plane Magnetic Field

AbstractMurmu et al. [23] recently presented a nonlocal model for the transverse vibration of simply supported graphene sheets in the presence of a unidirectional in-plane magnetic field. Further studies showed that the majority of Lorentz's force components were improperly provided and led to invalid governing equations. To remove such deficiencies, the most general form of Lorentz's force components is carefully extracted in the present work. The nonlocal equations of motion of the problem ...

The Cavitation Effect in Centrifugal Pumps

ABSTRACTCavitation in a centrifugal pump has a significant effect on pump performance.Cavitation degrades the performance of a pump, resulting in a fluctuating flow rateand discharge pressure, that reduces pumps efficiency and the operating life of thepump, In this research the effects of cavitation on pump performance was studiedon the power required ,efficiency , volume flow rate ,and the head , using a 3-Dsimulation by ANSYS (fluent flow) software for two phase flow (the water and it...

Performance Of A Modified Vehicle Drive System In Generating Hydropower

ABSTRACT Micro hydropower generated electricity can function as an effective tool for rural development. One of the barriers to smooth implementation of community/village micro hydropower schemes in the country is lack of appropriate hydraulic turbines, thus making the site specific costs of micro hydropower rather high, hence not easily affordable by the rural communities. The purpose of the study was to investigate the use of a vehicle live axle-propeller shaft system to replace conventiona...

Transient Analysis And Performance Prediction Of Passive Cooling Of Buildings Using Long Wave Nocturnal Radiation In Owerri, Nigeria

ABSTRACT Transient analysis and performance prediction of passive cooling of buildings using long wave nocturnal radiation in Owerri, Nigeria are presented. Owerri is a typical urban area in southeastern Nigeria lying between latitude 5° 4' and 6° 3' N and longitude 6° 15'and 7° 34' E. The system modeled consists of the room of a building with a radiator panel attached to its roof, water storage tank located inside the room, pump to circulate water through the radiator panel at nig...

Synthesis And Characterization Of Biofuels From Various Nigerian Crops For Internal Combustion Engines

ABSTRACT Bio-fuels (Biodiesel and Bio-ethanol fuels) are synthesized from various Nigerian crops (palm(Elaeis Guineensis) wine, raffia(Raffia Vinefera) trunk, sugar cane(Saccharum L), physic nut seed (Jatropha Curcas), castor bean seed(Ricinus Communis), sandbox seed (Hura Crepitans) and African bush mango nut (Dika Nut) (Irvingia Gabonensis)) to serve as alternative fuels for internal combustion engines. The direct base-catalyzed trans-esterification process is employed in the biodiese...

Experimental Investigation Of Upflow Bioreactors With Central Substrate Dispenser

ABSTRACT Experimental investigation of anaerobic digestion of the organic fraction of municipal solid waste (MSW) in an upflow bioreactor with central substrate dispenser (UBCSD) is presented. The UBCSD consists of two similar size bioreactors joined by a central substrate dispenser (CSD). The UBCSD is a component of an integrated system of bioreactors also containing the upflow anaerobic sludge blanket (UASB) reactor and the continuous stirred tank reactor (CSTR), assembled systematic...

Energy - Exergy Based Performance Analysis Of A Solid Adsorption Solar Refrigerator

ABSTRACT The Energy - Exergy based performance analysis of the Solid Adsorption Solar Refrigerator is presented. The system comprises the collector/generator/adsorber, the condenser and the evaporator. It utilizes activated carbon/methanol as its adsorbent/adsorbate working combination. The exergy performance analysis of this refrigerator involves detailed assessment of all the following sub-processes that make up the refrigeration cycle, which are isosteric heat-up phase, desorption ph...

Development Of A Gas Propelled Rocket Engine

ABSTRACT This thesis examines the development of a gas propellant rocket motor using cheap local materials. The fabrication of the prototype rocket engine was achieved by using machine tools like the lathe and drilling machines. The internal radius around the nozzle throat area was made without using any special tools for curves. The engine was tested twice and readings or data taken for pressure and temperature. Two thermocouples were damaged because the temperature exceeded their temp...

Design Of A Robust Electronic Internal Temperature Controller For Petroleum Distillation Columns

Abstract Design of a Robust Electronic Internal Temperature Controller for Petroleum Distillation is presented in this Thesis. During unstable weather conditions, there is a noticeable drop in the distillation internal column temperature. An extreme and frustrating case of this occurs during rainfall and at night when the fractional distillation column external temperature drops, greatly affecting the internal. Consequently, it becomes difficult to maintain a stable and optimum interna...

Design And Performance Evaluation Of A Parabolic Solar Cooker

Abstract The design, construction and performance test of a parabolic solar cooker for domestic use are presented. The simple experimental parabolic solar cooker, made of locally available materials, consists of a parabolic dish of thickness 0.3mm, adjustable mechanism, pot, pot holder, base support and a reflecting glass surface. The concave surface of the dish was lagged with reflective glasses which serve as a reflecting surface. Commercially available (3mm) thick glass is used as gl...

Comparative Analysis Of Renewable Energy Sources For Power Generation In Nigeria

ABSTRACT A comparative analysis of renewable energy sources for power generation in Nigeria is presented. The three renewable energy resources of solar radiation, wind energy and hydro power were investigated for six locations (Northwest, Northeasth, North-central, Southwest, Southeast and South-south) representing the six geo-political zones of Nigeria. The Hargreaves and Samani model was used to investigate the solar energy potential of the study locations of Sokoto, Maiduguri, Makur...

An Experimental Study On Different Types Of Alternative Fuels For Production Of Bricks On Vertical Shaft Kilns

Abstract This study is mainly concentrated on how to produce burnt clay bricks with a minimum firing cost and friendly Environmental Impact, through a new implemented energy – efficient technology, ie the Vertical Shaft Brick Kiln (VSBK) in the Sudan. The study aims to manufacture modeled building green bricks with different cheap solid additives having a high heating values [industrial and agricultural], petro-coke, animal dung, and saw-dust as an internal fuel. Model samples were ...

Study Of Internal Combustion Engines Waste Heat Recovery Using Turbocharger Compounding

Abstract The purpose of this project is to study the effects of turbocharger technology in a diesel engine. The Perkins diesel six cylinders 4 stroke Stationary CI Engine (case study) comes without a turbocharger. The Study is based on predict the effects of using this technology in the performance of engine, air pollution and global warming by calculations and simulation. After the calculations and simulation found that Recovering technology is decreasing the temperature of exhaust g...

Performance Analysis For Kaplan Hydraulic Turbines In Jebel Aulia Dam

Abstract: Kaplan Hydraulic Turbines defined as prime movers that transform the kinetic energy for the flow rate of water and head to mechanical energy and electrical energy by electric generator shaft. And knowing the efficiency of a hydraulic turbine has important operational and financial benefits to those who operate in power plant stations. This research focused on the analysis of the effect of the head and the rate of discharge on the energy produced and compared with the other ...


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