The heat transfer enhancement in a D-shaped heat exchanger using nanofluid is analyzed using a modern numerical method. The double-MRT lattice Boltzmann method is utilized to simulate the fluid flow and heat transfer. On the experimental phase, the thermal conductivity and viscosity of Al2O3-EG/W(60/40 vol%) are measured using experiments with modern devices. Some correlations based on experimental data are developed as a function of temperature for different nanoparticle concentrations. These temperature/nanoparticle concentration-based correlations are used in the numerical simulations to enhance the accuracy of results. In the present investigation, the impacts of Rayleigh number (10³ < Ra < 10⁶), nanoparticle concentration (0, 0.2, 0.4, 0.6, 0.8 and 1 vol%) and different arrangements of internal pipes on the streamlines, isotherm patterns, local/average heat transfer rate, local/average entropy generation and heatlines are studied comprehensively.

使用现代数值方法分析了使用纳米流体的D形热交换器中的传热增强。利用双重MRT格子Boltzmann方法来模拟流体流动和传热。在实验阶段，使用现代设备进行的实验测量了Al2O3-EG / W（60/40 vol％）的热导率和粘度。对于不同的纳米颗粒浓度，根据实验数据建立了一些相关性，这些相关性是温度的函数。这些基于温度/纳米粒子浓度的相关性用于数值模拟中，以提高结果的准确性。在本研究中，瑞利数（10 ³  <  Ra  <10 ⁶），纳米颗粒浓度（0、0.2、0.4、0.6、0.8和1 vol％）以及内部管道在流线上的不同布置，等温线模式，局部/平均传热率，局部/平均熵产生和热线。