【摘要】 本文研究了纳米TiO₂颗粒对碳酸丙烯酯（PC）吸收CO₂的影响,并基于输运机理、微对流机理,建立了三维非稳态多粒子双机理模型对实验结果进行预测。研究表明:纳米流体的黏度随着颗粒纳米颗粒粒径越小,增强因子越大固含量的增大而增大;增强因子随着颗粒固含量的增大先增大后减小,存在最佳固含量;颗粒固含量较小时,相同固含量,纳米颗粒粒径越小,增强因子越大;颗粒固含量较大时,相同固含量,纳米颗粒粒径越大,增强因子越大;随着纳米颗粒粒径的增大,最佳固含量逐渐增大;模型计算值与实验值符合的较好,模型可以预测实验结果。更多还原

【Abstract】 This paper studies how TiO₂ nanoparticles affect propylene carbonate absorption of CO₂ and develops a three-dimensional instantaneous numerous-particle di-mechanism model based on the shuttle mechanism as well as a micro-convection mechanism to forecast the experimental results.The research shows that the viscosity of a nanofluid increases with enlargement of solid loading.The enhancement factor first increases and then decreases with increases in solid loading.This also proves the existence of optimal solid loading.When solid loading is small and similar,smaller nanoparticles result in larger enhancement factors.When the solid loading is large and uniform,larger nanoparticles create larger enhancement factors.As the particle size increases,the optimal solid loading gradually increases.But the particle size cannot be very large or else the nanoparticles will precipitate and the enhancement factor will be small.The results calculated by model agree well with the experimental results.The model can predict experimental data.更多还原