Enhancement in carbon dioxide absorption in water has been studied using SiO2 and TiO2 nanoparticles using the capillary tube apparatus for which previous results on Fe3O4 nanoparticles were reported earlier. Enhancements of up to 165% in the mass transfer coefficients were observed at fairly low volume fractions of the particles. A model which accounts for the effect of particles in terms of a superimposed convection has been proposed to explain the observed effects of particle size, hold-up, and material density. The model provides a good fit to the data from wetted wall column and capillary tube experiment for Fe3O4 from the previous literature, as well as for the data from this work.
Enhanced Mass Transfer Rates in Nanofluids: Experiments and Modeling
Manuscript received February 27, 2014; final manuscript received October 22, 2014; published online May 14, 2015. Assoc. Editor: Yogesh Jaluria.
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Khanolkar, R. U., and Suresh, A. K. (September 1, 2015). "Enhanced Mass Transfer Rates in Nanofluids: Experiments and Modeling." ASME. J. Heat Transfer. September 2015; 137(9): 091008. https://doi.org/10.1115/1.4030219
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