Yazar "Can, Omer F." seçeneğine göre listele

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    Exposure of the human eye to wind
    (Elsevier, 2016) Can, Omer F.
    We report an investigation of the exposure of the human eye to wind. The study was carried out at wind speeds of 40, 80, and 160 km/h. The pressure and forces acting on the eye were examined using the ANSYS CFX software package. The results highlight the necessity of using glasses, contact lens, or protective equipment when, for example, riding a motorcycle, skiing, parachuting, and paragliding. (C) 2015 Nalecz Institute of Biocybemetics and Biomedical Engineering. Published by Elsevier Sp. z o.o. All rights reserved.
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    Fluid Flow and Heat Transfer in a Channel with Noncircular Obstacles
    (Springer Heidelberg, 2016) Can, Omer F.
    Fluid flow and heat transfer in the presence of noncircular obstacles placed in a channel are investigated numerically. Study was performed as three dimensional. Ansys Cfx software was used for numerical study. k- model was used for solving of turbulence model equation. Average Nusselt numbers were investigated for six different obstacles (vertical bar, horizontal bar, square, angular square, triangle, and hexagonal) with Reynolds numbers of Re = 10,000, Re = 20,000, and Re = 40,000, and compared with a channel with no obstacle. The largest increase in the average Nusselt number occurred when a vertical bar was placed in the channel. We fitted the average Nusselt number using , where n and m are parameters, to achieve for all geometries. Drag coefficients were investigated for any obstacle. The velocity profiles and streamlines at the channel output were examined at Re = 20,000 for seven different geometries. The velocity profile along the channel was investigated at Re = 20,000 with a hexagonal obstacle.
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    HEAT TRANSFER FROM A SLIGHTLY CURVED CONVEX SURFACE
    (Begell House Inc, 2023) Can, Omer F.; Ozgen, Filiz; Celik, Nevin; Dagtekin, Ihsan
    This study is prepared to analyze the heat transfer from a uniformly heated, slightly curved convex (SCX) surface numerically using computational fluid dynamics (CFD) code of commercial software ANSYS-CFX. Some experimental results are also obtained by means of a wind tunnel setup to confirm the results of numerical study. After a good agreement is achieved between the experimental and numerical results, the effects of some major parameters on heat transfer around the SCX surface are determined by using numerical results. Effects of Prandtl number (Pr = 0.237 to 3431), Reynolds number (Re = 40,000 and 400,000), and curvature ratio (CR = 1, 2, and 4) on local Nusselt number (Nu) along the circumference of SCX are the extracted results. Additionally, new correlations of Nu depending on Re, Pr, and CR are obtained.The prime outcomes of this mathematical investigation are provided here. An exact numerical CFD solution is provided for the turbulent external flow around the curved surface appearing in this study. The graphical solutions of Nu number that show the heat transfer rate of the system can be divided into three regions for various Re numbers. The maximum average heat transfer is observed in the case of higher curvature ratio.
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    NUMERICAL ANALYSIS OF A TURBULENT PLUNGING WATER JET
    (Begell House Inc, 2024) Can, Omer F.; Bagatur, Tamer; Celik, Nevin
    In the present study, we employed multiphase computational fluid dynamics analysis to investigate the mechanisms of air entrainment by plunging liquid jets. The ANSY-CFX commercial software program, which is based on finiteelement analysis, was used in the numerical simulations. The effects of the exit velocity of the jet on the velocity distribution in the pool, bubble depth, and volumetric fraction of air were the extracted results of the simulations. In this article, we conducted verification analyses to compare the results obtained from our numerical runs to the results of a previously published experimental study. Good agreement was achieved between the numerical simulations and the experimental study.
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    Numerical Analysis of External Flow Heat Transfer Around Slightly-Curved Surfaces
    (Springer Heidelberg, 2014) Can, Omer F.; Celik, Nevin; Dagtekin, Ihsan
    In the present study, heat transfer around curved surfaces, such as slightly-convex and slightly-concave surfaces, is investigated numerically. The curvature ratio R varied by varying the ratio of the final apex-to-chord line distance to curvature-radius (r), where the final apex-to-chord line distance to be as 0.05, 0.1 and 0.2 m while the curvature-radius (r) keeps constant as 0.05 m (, 2 and 4). The results are parameterized by Reynolds number Re, ranged from 40,000 to 400,000. Air flow around a circular cylinder body is also simulated for verifications. The heat transfer results have graphically been presented in terms of local Nu numbers. New correlations of average Nu numbers are also derived for both slightly-convex and slightly-concave configurations. As a result, it was concluded that average and local Nusselt numbers decrease with increasing surface curvature ratio R for convex surfaces, whilst they increase for concave surfaces.
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    Numerical Investigation of Cross-Flow Water Cooling Towers
    (Asme, 2023) Can, Omer F.; Alabbas, Muhammed
    In this study, thermal performance of the forced cross-flow water cooling tower is numerically investigated by using the commercial computational fluid dynamics software ansys-cfx. The temperature variation between inlet and outlet of the water, namely, process water temperature, is the main extracted result of simulations. Additionally, the cooling range (CR) that is the difference between inlet water temperature and outlet water temperature is the second representative result of the analysis. The effect of air velocity (V-a), water droplet diameter (d(w)), and water temperature at the inlet of tower (T-w) are the variables that are considered to be the effective design parameters on the process temperature of the water. The process water temperature decreases, but the cooling range increases when the air velocity increases. When the inlet water temperature increases, the process water temperature and the cooling range also increase. On the other hand, the process water temperature decreases with the decreasing diameter of water droplets.