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Effect of adding nanoparticle on squeezing flow and heat transfer improvement using KKL model

机译：使用KKL模型添加纳米颗粒对挤压流动和传热改善的影响

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Purpose - Nanofluid flow which is squeezed between parallel plates is studied using differential transformation method (DTM). The fluid in the enclosure is water containing different types of nanoparticles: Al_2O_3 and CuO. The effective thermal conductivity and viscosity of nanofluid are calculated by Koo- Kleinstreuer-Li (KKL) correlation. The comparison between the results from DTM and numerical method are in well agreement which proofs the capability of this method for solving such problems. Effects of the squeeze number and nanofluid volume fraction on flow and heat transfer are examined. Results indicate that Nusselt number augment with increase of the nanoparticle volume fraction. Also, it can be found that heat transfer enhancement of CuO is higher than Al_2O_3. Design/methodology/approach - The problem of nanofluid flow which is squeezed between parallel plates is investigated analytically using DTM. The fluid in the enclosure is water containing different types of nanoparticles: Al_2O_3 and CuO. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL correlation. In this model, effect of Brownian motion on the effective thermal conductivity is considered. The comparison between the results from DTM and numerical method are in well agreement which proves the capability of this method for solving such problems. The effect of the squeeze number and the nanofluid volume fraction on flow and heat transfer is investigated. The results show that Nusselt number increase with increase of the nanoparticle volume fraction. Also, it can be found that heat transfer enhancement of CuO is higher than Al_2O_3. Findings - The effect of the squeeze number and the nanofluid volume fraction on flow and heat transfer is investigated. The results show that Nusselt number increase with increase of the nanoparticle volume fraction. Also, it can be found that heat transfer enhancement of CuO is higher than Al_2O_3.
机译：目的-使用微分变换法（DTM）研究在平行板之间挤压的纳米流体流。外壳中的流体是包含不同类型的纳米粒子的水：Al_2O_3和CuO。纳米流体的有效导热系数和粘度通过Koo-Kleinstreuer-Li（KKL）相关性计算。 DTM结果与数值方法的比较结果吻合良好，证明了该方法解决此类问题的能力。研究了挤压数和纳米流体体积分数对流动和传热的影响。结果表明，随着纳米粒子体积分数的增加，努塞尔数增加。而且，可以发现CuO的传热增强高于Al_2O_3。设计/方法/方法-使用DTM分析研究了平行板之间挤压的纳米流体流动问题。外壳中的流体是包含不同类型的纳米粒子的水：Al_2O_3和CuO。通过KKL相关性计算纳米流体的有效导热率和粘度。在该模型中，考虑了布朗运动对有效导热系数的影响。 DTM结果与数值方法的比较结果吻合良好，证明了该方法解决此类问题的能力。研究了挤压数和纳米流体体积分数对流动和传热的影响。结果表明，随着纳米粒子体积分数的增加，努塞尔数增加。而且，可以发现CuO的传热增强高于Al_2O_3。发现-研究了挤压数和纳米流体体积分数对流动和传热的影响。结果表明，随着纳米粒子体积分数的增加，努塞尔数增加。而且，可以发现CuO的传热增强高于Al_2O_3。

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