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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Investigation of heat transfer and fluid flow behaviors of CuO/(60:40)% ethylene glycol and water nanofluid through a serpentine milichannel heat exchanger
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Investigation of heat transfer and fluid flow behaviors of CuO/(60:40)% ethylene glycol and water nanofluid through a serpentine milichannel heat exchanger

机译：通过蛇形MILICHANNEL热交换器对CUO /（60:40）％乙二醇和水纳米流体进行热传递和流体流动的研究

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Purpose - This paper aims to investigate the three-dimensional (3D) numerical simulations, based on the Navier-Stokes equations and the energy equation. Forced convection of a mixture of (60:40) percent ethylene glycol and water, was used as the base fluid and CuO nanoparticles, through a serpentine minichannel. Design/methodology/approach - In this simulation, a serpentine mini-channel heat exchanger was simulated. The fluid studied in this simulation was composed of a mixture of (60:40) per cent ethylene glycol and water, was used as the base fluid and CuO nanoparticles. Four slabs and three serpentines were used in this study. The serpentine section is connected to the slab. Three equidistant circular channels (1 mm in diameter) were implemented inside the slab. Findings - Results show that nanoparticles increase the fluid pressure drop and by changing volume fraction of nanoparticles from 0 to 1 per cent, the pressure drop of nanofluids increases between 42and 47 per cent, for Reynolds numbers from 100 to 500. The existence of serpentine bend in the minichannel heat exchanger causes the heat transfer rate to increase. Increase the volume fraction of nanoparticles reduces the fluid temperature at the outlet of the heat exchanger. The numerical results show that in Re = 500, at the beginning of the last slab in middle channel by changing volume fraction of nanoparticles from 0 to 2 per cent, local Nusselt number 57.40 per cent increase. The existence of the serpentine bend causes the heat transfer rate to increase. Originality/value - Forced convection of a mixture of (60:40) per cent ethylene glycol and water by using of 3D numerical simulations, based on the Navier-Stokes equations.
机译：目的 - 本文旨在研究基于Navier-Stokes方程和能量方程的三维（3D）数值模拟。 （60:40）百分比乙二醇和水的混合物的强制对流用作基础流体和CuO纳米颗粒，通过蛇形迷你烷基。设计/方法/方法 - 在该模拟中，模拟了蛇形迷你通道热交换器。在该模拟中研究的流体由（60:40）％乙二醇和水的混合物组成，用作基础流体和CuO纳米颗粒。本研究中使用了四个板坯和三种蛇形。蛇形部分连接到板坯。在板内实施了三个等距圆形通道（直径1毫米）。结果表明，纳米粒子会增加流体压降，通过将纳米颗粒的体积分数变化为0％至1％，纳米流体的压降增加了42和47％，对于100至500的雷诺数。蛇形弯曲的存在在迷你通道的热交换器中导致传热速度增加。增加纳米颗粒的体积分数降低了热交换器出口处的流体温度。数值结果表明，在RE = 500中，通过将纳米颗粒的体积分数从0％变化为0％至2％，当地露面数为57.40％。蛇纹石弯曲的存在导致传热速率增加。基于Navier-Stokes方程，通过使用3D数值模拟，原创/值 - 强制对（60:40）乙二醇和水的混合物对流。

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