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    Analysis of Thermal and Flow Characteristics in a Combined Cross-Flow and Jet-Flow Configuration with Flow-Guiding Fins
    (Isfahan Univ Technology, 2022) Öztürk, M. S.; Demircan, T.
    This study investigated the enhanced cooling of electronic components at high temperatures with cross-flow and jet-flow combinations. The cooling performance of four different model geometries (Models 1, 2, 3, and 4) of an electronic component was analysed by considering different jet-to-channel inlet velocity ratios (V-j/V-c) and ratios of the distance between the jet and impinging surface to jet diameter (H/D). The V-j/V(c )and H/D ratios were varied in the 0-3 and 2-4 ranges, respectively, in the computational fluid dynamics analysis. The thermal and flow characteristics were revealed through a comparative result analysis, also considering results from the literature. The heat transfer improved, the Nusselt number increased, and the electronic surface temperature decreased with an increase in the V-j/V-c ratio. However, the Nusselt number decreased with an increase in the H/D ratio. Models 2 and 4 had higher heat transfer from the electronic component than the other models. A low H/D ratio and low V-j/V-c ratio yielded higher heat transfer in Model 3 than in Model 1.
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    Numerical Analysis Of Cooling An Electronic Circuit Component With Cross Flow And Jet Combination
    (Cambridge Univ Press, 2019) Demircan, T.
    In this study, cooling of a constant temperature cube that represents electronic components inserted inside a channel are investigated. For this purpose, primary air with constant velocity is transferred from channel input, and secondary air with impinging jet is transferred to channel upper surface which corresponds to top part of the components. The flows are in contact with the cube that has constant temperature and effects the thermal boundary layer on the cube surfaces to create a heat transfer from cube to fluid. This situation is simulated under turbulence conditions for different values of nozzle jet input velocity (V-j) and channel input velocity (U-c) using Reynolds number between 30000-90000 based on channel input velocity. For this purpose, velocity, temperature, and pressure distributions are obtained for the solution region using CFD package program. As a result, flow and thermal characteristics inside the channel are parametrically calculated based on Reynolds number, Nusselt number, and cube surface temperature.