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首页> 外文期刊>Journal of Oleo Science >Numerical Study of the Enhancement of Heat Transfer for Hybrid CuO-Cu Nanofluids Flowing in a Circular Pipe
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Numerical Study of the Enhancement of Heat Transfer for Hybrid CuO-Cu Nanofluids Flowing in a Circular Pipe

机译：混合CuO-Cu纳米流体在圆管中流动强化传热的数值研究

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摘要

A numerical simulation model for laminar flow of nanofluids in a pipe with constant heat flux on the wall was built to study the effect of the Reynolds number on convective heat transfer and pressure loss. The investigation was performed for hybrid nanofluids consisting of CuO-Cu nanoparticles and compared with CuO and Cu in which the nanoparticles have a spherical shape with size 50, 50, 50nm respectively. The nanofluids were prepared, following which the thermal conductivity and dynamic viscosity were measured for a range of temperatures (10-60℃). The numerical results obtained were compared with the existing well-established correlation. The prediction of the Nusselt number for nanofluids agrees well with the Shah correlation. The comparison of heat transfer coefficients for CuO, Cu and CuO-Cu presented an increase in thermal conductivity of the nanofluid as the convective heat transfer coefficient increased. It was found that the pressure loss increases with an increase in the Reynolds number, nanoparticle density and particle volume fraction. However, the flow demonstrates enhancement in heat transfer which becomes greater with an increase in the Reynolds number for the nanofluid flow.
机译：建立了纳米流体在壁上具有恒定热通量的层流的数值模拟模型，以研究雷诺数对流传热和压力损失的影响。对由CuO-Cu纳米粒子组成的杂化纳米流体进行了研究，并与其中纳米粒子分别为球形，尺寸分别为50、50、50nm的CuO和Cu进行了比较。制备了纳米流体，然后在一定温度范围（10-60℃）下测量了热导率和动态粘度。将获得的数值结果与现有公认的相关性进行比较。纳米流体的Nusselt数的预测与Shah相关性非常吻合。 CuO，Cu和CuO-Cu的传热系数比较表明，随着对流传热系数的增加，纳米流体的导热系数增加。发现压力损失随着雷诺数，纳米颗粒密度和颗粒体积分数的增加而增加。然而，该流动显示出传热的增强，其随着纳米流体流动的雷诺数的增加而变得更大。

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  • 来源
    《Journal of Oleo Science》 |2013年第7期|533-539|共7页
  • 作者

    Hyder H. Balla; Shahrir Abdullah; Wan MohdFaizal; Rozli Zulkifli; Kamaruzaman Sopian;

  • 作者单位

    Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, UniversitiKebangsaan Malaysia, 43600 UKM Bangi, Selangor, MALAYSIA,Foundation of Technical Education, Iraq, 10013;

    Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, UniversitiKebangsaan Malaysia, 43600 UKM Bangi, Selangor, MALAYSIA;

    Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, UniversitiKebangsaan Malaysia, 43600 UKM Bangi, Selangor, MALAYSIA;

    Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, UniversitiKebangsaan Malaysia, 43600 UKM Bangi, Selangor, MALAYSIA;

    Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, UniversitiKebangsaan Malaysia, 43600 UKM Bangi, Selangor, MALAYSIA;

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  • 正文语种 eng
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  • 关键词

    Nanofluid; heat transfer enhancement; oxide nanoparticles; hybrid nanofluid; pressure loss; heat transfer coefficient;

    机译：纳米流体传热增强;氧化物纳米粒子混合纳米流体压力损失传热系数;

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