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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical analysis and ANFIS modeling for mixed convection of CNT-water nanofluid filled branching channel with an annulus and a rotating inner surface at the junction
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Numerical analysis and ANFIS modeling for mixed convection of CNT-water nanofluid filled branching channel with an annulus and a rotating inner surface at the junction

机译：碳纳米管-水纳米流体填充分支通道在对接处有环形空间和旋转内表面的混合对流的数值分析和ANFIS建模

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摘要

Numerical study for mixed convection of CNT-water nanofluid flow in a branching channel with annulus at the junction and a rotating surface was performed by using finite volume method. This geometry can be used in a variety of engineering applications such as in geothermal, gas pipelines, in pharmaceutical, fuel cells and many others. The numerical simulations are performed for various values of pertinent parameters such as Richardson number, angular rotational velocity of the inner surface at the annulus junction, solid nanoparticle volume fraction and diameter of the inner rotating. It was observed that the recirculation regions established within the annulus and separated fluid zones on the walls of the branching channel near the junction are strongly influenced by the by rotation of the inner surface at the annulus. The average Nusselt number enhancements up to 64% are obtained for the nanofluid containing the highest particle volume fraction forRi = 0.01 andRi = 1 when the inclination angle of the lower branching channel is 45°. Finally, ANFIS modeling technique with triangular-shaped membership function and 48 fuzzy rules are used to predict the average Nusselt numbers for the hot walls of the channel and annulus part.
机译：利用有限体积法对碳纳米管-水纳米流体在分支通道中的环形通道与旋转面的混合对流进行了数值研究。这种几何形状可用于多种工程应用中，例如地热，天然气管道，制药，燃料电池等。对相关参数的各种值（例如，理查森数，环连接处的内表面的角旋转速度，固体纳米颗粒的体积分数和内部旋转的直径）执行数值模拟。观察到，在环形空间内形成的再循环区域和靠近接合处的分支通道壁上的分离的流体区域受到环形空间内表面旋转的强烈影响。当下部分支通道的倾角为45°时，对于Ri = 0.01和Ri = 1包含最高颗粒体积分数的纳米流体，平均努塞尔数提高了64％。最后，使用具有三角形隶属度函数和48条模糊规则的ANFIS建模技术来预测通道和环空部分热壁的平均Nusselt数。

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