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Thermodiffusion Coefficients of Water/Ethanol Mixtures for Low Water Mass Fractions

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Abstract

The difficulty of measuring the thermodiffusion coefficients by optical properties of water-ethanol binary mixtures of approximately 20 wt % of water has been highlighted by several authors in recent years. This is because the concentration derivative of the refractive index (∂ n/∂ c) p,T is near zero at this concentration. For this reason, we measured the thermodiffusion coefficients by means of density analysis using the thermogravitational column technique from 5 wt % to 50 wt % at 25∘C. In addition, we measured the thermophysical properties such as density, dynamic viscosity, thermal expansion and mass expansion.

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Acknowledgments

Authors would like to thank the support of Research Groups (IT1009-16), Research Fellowship (Pre_2014_1_283) and Elkartek of Basque Government, TERDISOMEZ (FIS2014-58950-C2-1-P) of the MINECO and DCMIX (DCMIX-NCR-00022-QS) from the European Space Agency.

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Authors and Affiliations

  1. Department of Mechanical and Manufacturing, MGEP Mondragon Goi Eskola Politeknikoa, Loramendi 4 Apdo. 23, 20500, Mondragon, Spain

    E. Lapeira & M. M. Bou-Ali

  2. Department of Applied Physics II, University of Basque Country, Apdo. 644.84080, Bilbao, Spain

    J. A. Madariaga & C. Santamaría

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  1. E. Lapeira
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  2. M. M. Bou-Ali
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  3. J. A. Madariaga
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  4. C. Santamaría
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Correspondence to M. M. Bou-Ali.

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This article belongs to the Topical Collection: Advances in Gravity-related Phenomena in Biological, Chemical and Physical Systems

Guest Editors: Valentina Shevtsova, Ruth Hemmersbach

J. A. Madariaga was decease

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Lapeira, E., Bou-Ali, M.M., Madariaga, J.A. et al. Thermodiffusion Coefficients of Water/Ethanol Mixtures for Low Water Mass Fractions. Microgravity Sci. Technol. 28, 553–557 (2016). https://doi.org/10.1007/s12217-016-9508-7

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  • DOI: https://doi.org/10.1007/s12217-016-9508-7

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