DEPARTMENT OF MECHANICAL ENGINEERING
Permanent URI for this communityhttps://repository.ui.edu.ng/handle/123456789/476
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Item Characterization of fluid flow using random walk dynamics(2011) Adegbola, A. A.; Salau, T. A. O."There has been growing need to characterize the fluid flow through a simplified model such as random walk dynamics. The research work covered three distinct regions of fluid flow namely the laminar region the transition region and the turbulent region Appropriate flow charts and FORTRAN-90 source codes were developed to solve relevant fluid flow governing equations. Reynolds number was used as the control parameter to tune from laminar to turbulent flow while relevant solution was graphed using Microsoft Excel. The graph shows the distinct regions. The first region characterizes laminar region will) three straight-line segments. The second region is the transition region, which is in form of wavy line segments. The third region is the turbulent region in which higher wavy line segments are shown. The degree of waviness and number of wavy line segments increases from transition region to turbulent region. The result shows that fluid flow can be characterized through the use of random walk dynamics. "Item Effect of viscous dissipation term on a fluid between two moving parallel plates(2018-08) Petinrin, M. O.; Adegbola, A. A.The fully developed laminar heat transfer of a Newtonian fluid flowing between two parallel plates where the bottom plate is fixed and the top plate is moving in an axial direction at constant speed was analyzed taking into account the iscous dissipation of the flowing fluid. Applying the velocity profile obtained for the plane Coutte-Poiseuille laminar flow, the energy equation with the viscous dissipation term was exactly solved for the boundary conditions of constant wall heat flux at one wall with the other insulated. Special attention is given to the shear produced by the movable top plate over and above the viscous dissipation due to internal fluid friction. The reason behind the behaviour exhibits by the temperature profile obtained at different velocities can be attributed to the effect of viscous dissipation coming into play due to the shear stress within the fluid layer induced by the movement of the upper plateItem Experimental investigation of flow and heat transfer in a channel with dimpled plate(2019) Oluyale, J. O.; Petinrin, M. O.; Adegbola, A. A.; Ishola, F. A.This study presents the experimental investigation on the effect of dimpled arrangements on flow and heat transfer characteristics. Three plate surfaces were prepared (smooth, evenly distributed spherical dimples and unevenly distributed spherical dimples) and were placed successively in a channel. The unevenly distributed dimpled plate had the same dimple density with the evenly distributed dimpled plate but had varying transverse pitches to concentrate the dimples at midplate in flow direction. Data obtained from the experiment were analysed to determine the performance of each dimpled plate channel. It was observed that the average Nusselt number due to the heat interaction with the air-flow increases with the Reynolds number. The evenly and unevenly dimple plate channels had respectively, 75.7% and 91.8% increase in Nusselt number over the smooth channel. The flow friction factors of the evenly and unevenly dimple plate channels were merely more than that of smooth plate channel by 0.59% and 0.67%, respectively. Thus, the unevenly dimple plate channel had the highest overall thermal-hydraulic performance, followed by the evenly dimple plate channel.