2007•Chemical Engineering(China)Requires access
Experimental study on micromixing process in viscous media
Cui Sha-sha
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Abstract
The micromixing behavior in viscous media in tanks was studied by Iodide-Iodate reaction system in(glycerin)-water mixtures with viscosities from 0.001 Pa·s to 0.077 Pa·s and the micromixing capability of full-zone agitator was examined.The results indicate that micromixing condition becomes worse at higher viscosity and lower rotation speed of agitator and becomes better at higher rotation speed of agitator.The micromixing condition in viscous system is determined by both engulfment and molecular diffusion.In lower viscosity,the capability of(paddle) impeller is better than full-zone agitator.In higher viscosity and higher power dissipation rate per unit mass,micromixing ability of full-zone is better than paddle impeller.