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Thermodiffusion Coefficients of Nanofluid Binary Mixtures

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Abstract

The thermodiffusion coefficients for three binary mixtures formed by 1,2,3,4-tetrahydronaphthalene + toluene, fullerene C60 + toluene, and fullerene C60 + 1,2,3,4-tetrahydronaphthalene were determined. In this study, the corresponding concentration of the nanofluid ternary mixture of fullerene C60, 1,2,3,4-tetrahydronaphthalene and toluene (0.0007–0.60–0.3993) proposed in the DCMIX4 project at 25 °C was studied. For the binary mixtures, using the thermogravitational column technique, the concentration distributions along the columns in a steady state were determined using density measurements. In addition, some thermophysical properties necessary to determine the transport coefficients were determined: density, thermal expansion coefficient, mass expansion coefficient and dynamic viscosity. The obtained results show that the thermodiffusion coefficients of samples containing fullerene are an order of magnitude higher than the thermodiffusion coefficient of the liquid binary mixture, indicating that the nanoparticles have higher thermodiffusion coefficients than the liquid binary mixture.

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Acknowledgements

The authors would like to thank Prof J. C. Legros, Prof J. K. Platten and Prof J. A. Madariaga for their unceasing commitment in thermodiffusion studies. We would also like to acknowledge the support of the FETRAFLU (2018-CIEN-000101-01) from the Gipuzkoa Program for Science, ATNEMFLU (ESP2017-83544-C3-1-P) of the MINECO, DCMIX (AO-2009-0858/1056) from the European Space Agency and the Research Group Program (IT1009-16) from the Basque Government.

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Correspondence to M. Mounir Bou-Ali.

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Errarte, A., Bou-Ali, M.M., Aginagalde, M. et al. Thermodiffusion Coefficients of Nanofluid Binary Mixtures. Microgravity Sci. Technol. 31, 877–882 (2019). https://doi.org/10.1007/s12217-019-09725-7

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  • DOI: https://doi.org/10.1007/s12217-019-09725-7

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