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首页> 外文会议>International Postgraduate Conference on Mechanical Engineering >Numerical analysis on thermal and hydraulic performance of diverging-converging minichannel heat sink using Al2O3-H2O nanofluid
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Numerical analysis on thermal and hydraulic performance of diverging-converging minichannel heat sink using Al2O3-H2O nanofluid

机译：AL2O3-H2O纳米流体分析散热 - 聚集散热器散热器热和水力性能的数值分析

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Miniaturization as a size reduction of electronic devices components lead to high performance,but with increase in heat flux density which reduce the efficiency of these devices.Minichannel has been considered to improve the heat dissipation with minimal pressure drop through regulation of the channel configurations.In this study,a divergent-convergent minichannel heat sink(DCMCHS)was investigated numerically using Finite volume method to model single-phase forced convection for nanofluid cooling as a passive means to enhance the heat transfer performance for Reynolds number range of 2000 to 2300 and using Aqueous Alumina as nanofluid with concentrations of 0.1-0.8%.The effect of Reynolds number,the convection coefficient and pressure drop in relation to the heat flux were investigated and discussed.The results show that,Nusselt number increases with increase in volume fraction and Reynolds number,whereas friction factor decreased with increasing Reynolds number.Heat removal by the nanofluid is higher near the walls than in the central part of the minichannel,and the performance factor is between 1.00-1.01 and it increases with increase in concentration and flow velocity.Thus,combine passive techniques of DCMCHS and nanofluid provides better enhancement of heat transfer and hydraulic attributes of the minichannel heat sink for cooling purposes.
机译：小型化作为电子设备组件的尺寸减小导致高性能高，但随着热通量密度的增加，降低了这些设备的效率。已经考虑通过通道配置的调节来改善最小压降的散热。本研究，使用有限体积法在数值上进行了分歧 - 会聚的迷你沟槽散热器（DCMCH），以模拟单相强制对流，用于纳米流体冷却作为无源装置，以增强2000至2300的雷诺数范围的传热性能和使用含氧化铝作为纳米流体，浓度为0.1-0.8％。雷诺数，对流系数和压力下降与热通量相关的影响，并讨论。结果表明，纽带数量随体积分数和雷诺增加而增加数量，而摩擦因子随着雷诺数的增加而降低。南部的移除在壁附近的壁上比在百分之势的中央部分靠近壁，并且性能因数在1.00-1.01之间，随着浓度和流速的增加而增加。组合DCMCH和纳米流体的被动技术可以更好地增强热传递和散热器的液压属性用于冷却目的。

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