Abstract This paper involves a numerical study of several water – ionic liquids mixtures and nanoparticle enhanced ionic liquids starting from a less studied ionic liquid: 1-Ethyl-3-methylimidazolium Methanesulfonate, [C2mim][CH3SO3]. The research start point was several previous published experimental results in regard to the water – ionic liquid mixtures and alumina based nanoparticle enhanced ionic liquids thermophysical properties. Consequently, all the considered fluids are completely described and can be successfully implemented in a numerical analysis using the single phase approach. The numerical analysis was performed in a cylindrical enclosure considering laminar steady state and results were collected in terms of Nusselt number, convective heat transfer coefficient, pressure drop and temperature on tube exit. Results were discussed in terms of heat transfer enhancement and pumping power requirement variation, as well as field synergy. Concluding, it can clearly say that mixing water with [C2mim][CH3SO3] ionic liquid it gets a decrease in laminar convective heat transfer coefficient, while adding nanoparticles the heat transfer is enhanced by maximum 50%, depending on the alumina mass concentration.

中文翻译：

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[C2mim][CH3SO3]–氧化铝纳米粒子增强离子液体内部层流的复杂评估

摘要 本文从研究较少的离子液体：1-乙基-3-甲基咪唑鎓甲磺酸盐，[C2mim][CH3SO3] 开始，对几种水-离子液体混合物和纳米粒子增强离子液体进行了数值研究。研究的起点是之前发表的几个关于水-离子液体混合物和氧化铝基纳米颗粒增强离子液体热物理性质的实验结果。因此，所有考虑的流体都得到了完整的描述，并且可以使用单相方法在数值分析中成功实施。在考虑层流稳态的圆柱形外壳中进行数值分析，并根据努塞尔数、对流传热系数、压降和管出口温度收集结果。结果就传热增强和泵送功率需求变化以及现场协同作用进行了讨论。最后，可以明确地说，将水与 [C2mim][CH3SO3] 离子液体混合后，层流对流传热系数会降低，而添加纳米颗粒时，传热最多可提高 50%，具体取决于氧化铝的质量浓度。