This article consists of a numerical study of natural convection heat transfer in three-dimensional cavity filled with nanofluids. This configuration is heated by a partition maintained at a hot constant and uniform temperature T_H. The right and left vertical walls are kept at a cold temperature T_C while the rest is adiabatic. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely, the nanofluid type, the Rayleigh number Ra = 10³, 10⁴, 10⁵, and 10⁶, and the volume fraction Ф varying between Ф = 0 and 0.1. The obtained results show a positive effect of the volume fraction and the Rayleigh number on the heat transfer improvement. The analysis of the results related to the heat transfer shows that the copper-based nanofluid guarantees the best thermal transfer. In addition, the increase of the heating section size and Ra leads to an increased amount of heat. Similarly, increasing the volume fraction improves the intensification of the flow and increases the heat exchange.

中文翻译：

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立方腔中存在纳米流体的自然对流的数值模拟

本文包括一个在三维流体中填充自然流体的自然对流换热的数值研究。通过保持在热恒定且均匀温度T _H的隔板加热该构造。左右垂直壁保持在低温温度T _C，其余则绝热。在腔中的流体流动和传热进行了研究用于不同组的理事参数，即，纳米流体类型，使瑞利数Ra的= 10 ³，10 ⁴，10 ⁵和10 ⁶，体积分数Ф在Ф= 0和0.1之间变化。获得的结果显示出体积分数和瑞利数对传热改善的积极影响。对与传热有关的结果的分析表明，铜基纳米流体可确保最佳的传热。另外，加热部分尺寸和Ra的增加导致热量增加。类似地，增加体积分数可改善流的强度并增加热交换。