This study aims to characterize the hydrodynamics and flow characteristics in a twin-blade planetary mixer with non-Newtonian fluids by using CFD modeling technique. The kneading pressure was recorded using an experimental setup, and a CFD model was verified. The flow characteristics and hydrodynamics in the mixing vessel containing the power-law fluids were analyzed quantitatively, particularly the influence of the flow behavior index n. Results revealed that as n increased from 0.25 to 1.75, the maximum shear rate decreased from 733 to 120 s⁻¹ and the local apparent viscosity in the kneading regions increased significantly. The maximum kneading pressure and power consumption increased almost exponentially with increasing n. The correlation for the kneading pressure and the correlation for the power consumption were established by introducing the pressure-oriented effective viscosity μ_e-p, the pressure-oriented effective shear rate ${\dot{\gamma }}_{e-p}$, the improved effective viscosity μ_ei and the improved effective shear rate ${\dot{\gamma }}_{\mathit{ei}}$.

中文翻译：

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非牛顿流体双叶片行星混合器的流体动力学和流动特性研究

本研究旨在通过使用 CFD 建模技术来表征具有非牛顿流体的双叶片行星混合器的流体动力学和流动特性。使用实验装置记录捏合压力，并验证 CFD 模型。定量分析了含有幂律流体的混合容器中的流动特性和流体动力学，特别是流动行为指数n的影响。结果表明，随着n从0.25 增加到1.75，最大剪切速率从733 降低到120 s ^-1并且捏合区域的局部表观粘度显着增加。随着n的增加，最大捏合压力和功耗几乎呈指数增长. 通过引入压力导向的有效粘度μ _e-p、压力导向的有效剪切速率，建立了捏合压力的相关性和功耗的相关性${\dot{\gamma }}_{e-p}$, 改进的有效粘度μ _ei和改进的有效剪切速率${\dot{\gamma }}_{\mathit{诶}}$.