Computational Fluid Dynamic Simulation Of A Novel Static Mixer

In order to give a quantitative description of the characteristics of a newly developed static mixer, the cross-over disk (COD) static mixer, Laser Doppler Anemometry (LDA) technology and computational fluid dynamics (CFD) method were used to investigate the hydrodynamic, heat transfer and mixing performance.Velocity profiles at different layers of the fluid flow in a round tube packed with two COD static mixers were obtained via LDA and CFD method in the range of Re from 87 to 1746. Six planes have been selected within the objective tube. The results indicate that velocity distributions are very complex and variable with the mixer structure. Analysis of 3-D velocity field indicates a spatially periodic flow which matches the periodicity of the mixer geometry. The agreement between the experimental data and the numerical predictions is quite well in most cases. Two common parameters, Z factor and friction factor (f), are used to evaluate the computational pressure drop. Correlations of the two parameters changed with Reynolds number were obtained. It can be concluded that the critical zone for changing from laminar to turbulent flow is 50