A study on influence of the gravity to mass transfer in diffusion process using interferometry technique

Liang Guo; Li Duan; Liang Hu; Qi Kang

doi:10.1117/12.839075

24 August 2009 A study on influence of the gravity to mass transfer in diffusion process using interferometry technique

Liang Guo, Li Duan, Liang Hu, Qi Kang

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73751V (2009) https://doi.org/10.1117/12.839075
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Pure liquid-liquid diffusion driven by concentration gradients is hard to study in normal gravity environments because of the contributing of convection and sedimentation to the mass transfer process. The paper presents the influence of gravity to mass transfer in diffusion process using an experimental technique based on optical digital interferometry for measuring mass transfer coefficients. The diffusion experiments are monitored by a March-Zehnder interferometer which can record all mass distribution information. Such information is not only available at the steady state, but within the whole diffusion process. The time-dependent evolution of the concentration field allows the measurement of diffusion coefficient. The measurements of transport coefficients have been performed in water/glucose mixture. The experiment apparatus are also set up for TF-1 rocket which can get the results in microgravity environment. So the significant influence of gravity can be demonstrated obviously.

Citation Download Citation

Liang Guo, Li Duan, Liang Hu, and Qi Kang "A study on influence of the gravity to mass transfer in diffusion process using interferometry technique", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73751V (24 August 2009); https://doi.org/10.1117/12.839075

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