Research Papers/Topics in Mechanical Engineering

ENGINEERING CHARACTERIZATION OF OGBEKE CLAY DEPOSIT FOR INDUSTRIAL APPLICATIONS

The engineering characterization of Ogbeke clay deposit has been investigated with a view of finding its usefulness in furnace refractory production and home. The chemical composition analysis was carried out using Atomic Absorption Spectroscopy (AAS). The physical properties tests such as shrinkage, porosity, water absorption, modulus of rupture, refractoriness, moisture content, plasticity, cold crushing strength, thermal shock resistance and particles size analysis were carried out using i...

Evaluating the Effect of Adding Steel Machining Chips on the Properties of Clay

Abstract:Steel machining waste known as chips is a kind of waste that can be returned to the process of raw material for steel fabrication or else be traded as co-product of other industrial activities. The reuse of this product is of great importance owing to the economic and environmental aspects. This work investigates the effect of steel machining chips as additive on the properties of clay. The physical properties of the clay and steel machining chips composite were determ...

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 ...

Methodological Approach of Performance Evaluation for Using Pump as Micro Hydro-turbine

Abstract The pumps work differently in terms of performance characteristics when operated in reverse mode to generate mechanical rotational energy driven by the water energy. The performance characteristics related to head, flow rate, specific speed and efficiency have been predicted differently from available conversion methods. Also, the procedure of selecting pump as hydro-turbine varies from different conversion methods. This article presents the methodological approach of evalua...

An Investigation on Performance of a Horizontal Entrained Flow Gasifier

Abstract A novel study on biomass-air gasification using a horizontal entrained-flow gasifier has been conducted. The use of a horizontal entrained-flow gasifier reactor was employed to assess the effect of the gasifier reactor orientation on the gasification process. The gasification experiments were conducted at 800˚C and equivalence ratio of 0.23 while maintaining gas hourly space velocity (GHSV) of 8000 h−1 . Preparation and characterisation of wood powder were performed using c...

Moderation of Admission Standards in the Nigerian Polytechnics- An Alternative to Enhancing Quality of Graduates

The qualities of Nigerian graduates have been a source of concern.The polytechnics have come under criticisms as lacking capacities to turn out competent technologists. However,this paper picks this issue from a different angle.The graduating grade so fa sample of engineering students in apolytechnic were correlated with their entry performances (Secondary Certificate and Matriculation Examinations) over three sessions. The correlation was weak (r=0.13;Ho:=0 accepted at...

Finite Element Modeling of Shop Built Spherical Pressure Vessels

ABSTRACTThis work builds on an earlier work done which used global coordinates where a large number of elements were needed to form a convergence of results for shop built spherical pressure vessels. In this work area coordinates were used. Any action that leads to an inability on the part of a structure to function as intended is known as failure. This research, therefore, investigates stresses developed in a shop built carbon steel spherical storage vessels using finite eleme...

DEVELOPMENT AND APPLICATION OF A MACHINE VISION SYSTEM FOR MEASUREMENT OF SURFACE ROUGHNESS

ABSTRACT Monitoring of surface roughness is an essential component in planning of machining processes as it affects the surface quality and dimensional accuracy of machined components. In this study, the development and application of a machine vision system suitable for on-line measurement of surface roughness of machined components using artificial neural network (ANN) is described. The system, which was based on digital image processing of the machined surface, consisted of a CCD came...

Preliminary Design of an Automated White Board Cleaner

ABSTRACTThe work presented in this paper is on the preliminary design and fabrication of an automated whiteboard cleaner. The objective here in is to reduce the man-power involved in cleaning white boards after use. Though the use of smart boards is increasing, many institutions in the developed and developing world still make use of white boards. The Autodesk software was used for the CAD drawing and thereafter the design analyses and fabrication were done. The auto-board was designed...

Modelling of solar energy potential in Nigeria using an artificial neural network mode

ABSTRACTIn this study, an artificial neural network (ANN) based model for prediction of solar energy potential in Nigeria (lat. 4–14N, log. 2–15E) was developed. Standard multilayered, feed-forward, back-propagation neural networks with different architecture were designed using neural toolbox for MATLAB. Geographical and meteorological data of 195 cities in Nigeria for period of 10 years (1983–1993) from the NASA geo-satellite database were used for the training and testing the netw...

Energy and cost analysis of organic fertilizer production in Nigeria

ABSTRACTEnergy study was conducted in an organic fertilizer production plant in Nigeria, to determine the energy consumption patterns and the associated costs for the production of both powdered and pelletised fertilizer. Analysis was conducted for a daily production of 9000 kg of the finished products. Eight and nine defined unit operations were required for production of powder and pellets, respectively. The electrical and manual energy required for the production of powder were 94.5 an...

Effect of Silicon Content and Shake-Out Time on Hardness and Grain Size Properties of GL 250 Cast Irons

ABSTRACTThe properties of cast iron grade GL 250 are dependent on the microstructures developed during casting. These microstructures are in turn dependent on the composition of the alloy, type of mould and other numerous casting practice variables such as shake-out time, pouring temperature, mould ambient conditions and inoculating technique. In this work, the effect of silicon content and shake-out time on the grain size (GS) and hardness properties of GL 250 cast iron was studied usin...

The application of fractal box dimensions in predicting the emission characteristics of colliding sawdust particles for sustainable sawmilling

The prediction of emission characteristics of sawdust particles immediately after the cutting operation from the interaction of band saw's blade and plank is a growing research area. Still, a wide gap exists with respect to understanding the behaviour of sawdust particles as they collide with one another. Previous efforts have focused on non-collision states of sawdust particles. However, in real life, collision of particles must occur, with several particles colliding after the cutting o...

Occupational Lead Exposure in Printing Presses: An Analytical Approach

ABSTRACTLead absorption poses a great threat to the health of workers in printing presses where commercial publishing is done. A case example is the commercial printing operations in Lagos, Nigeria. Since regular exposure to lead dusts could result in lead poisoning, complications that could cause death of victims, monitoring and controlling lead absorption of operators is essential for the maintenance of workers’ health and for the avoidance of the risk of incurring heavy losses ...


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