Thermal Conductivity of Al2O3/Water-Based Nanofluids: Revisiting the Influences of pH and Surfactant

Authors: Nizar Bouguerra, Ahmed Khabou, Sébastien Poncet, Saïd Elkoun

Abstract:

The present work focuses on the preparation and the stabilization of Al₂O₃-water based nanofluids. Though they have been widely considered in the past, to the best of our knowledge, there is no clear consensus about a proper way to prepare and stabilize them by the appropriate surfactant. In this paper, a careful experimental investigation is performed to quantify the combined influence of pH and the surfactant on the stability of Al₂O₃-water based nanofluids. Two volume concentrations of nanoparticles and three nanoparticle sizes have been considered. The good preparation and stability of these nanofluids are evaluated through thermal conductivity measurements. The results show that the optimum value for the thermal conductivity is obtained mainly by controlling the pH of the mixture and surfactants are not necessary to stabilize the solution.

Keywords: Nanofluid, thermal conductivity, pH, transient hot wire, surfactant, Al2O3, stability, dispersion, preparation.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1128145

References:

[1] S. U. S. Choi, J.A. Eastman, “Enhancing thermal conductivity of fluids with nanoparticles,” Am. Soc. Mech. Eng. New York, FED–231/MD-66, pp. 99–105, 1995.
[2] S. K. Das, S. U. S. Choi, W. Yu, and T. Pradeep, Nanofluids: Science and Technology, Wiley. 2008.
[3] J. C. Maxwell, A Treatise on Electricity and Magnetism, 2 edition, vol. 1., Clarendon Press, Oxford, 1881.
[4] J.A. Eastman, S.U.S. Choi, L. J. Thompson, and S. Lee, “Enhanced Thermal Conductivity Through the Development of Nanofluids,” in Mater. Res. Soc. Symp. Proc., Boston, p. 457:3-11, 1996.
[5] M.-S. Liu, M. C.-C. Lin, I.-T. Huang, and C.-C. Wang, “Enhancement of Thermal Conductivity with CuO for Nanofluids,” Chem. Eng. Technol., vol. 29, no. 1, pp. 72–77, 2006.
[6] Y. Hwang, H. S. Park, J. K. Lee, and W. H. Jung, “Thermal conductivity and lubrication characteristics of nanofluids,” Curr. Appl. Phys., vol. 6, pp. e67–e71, 2006.
[7] W. Yu, H. Xie, L. Chen, and Y. Li, “Investigation of thermal conductivity and viscosity of ethylene glycol based ZnO nanofluid,” Thermochim. Acta, vol. 491, no. 1, pp. 92–96, 2009.
[8] H. A. Mintsa, G. Roy, C. T. Nguyen, and D. Doucet, “New temperature dependent thermal conductivity data for water-based nanofluids,” Int. J. Therm. Sci., vol. 48, no. 2, pp. 363–371, 2009.
[9] J. Buongiomo, D. C. Venerus, and T. Mckrell, “A benchmark study on the thermal conductivity of nanofluids,” J. Appl. Phys., vol. 106, no. 9, pp. 94312-1-94312–14, 2009.
[10] J. Huang, X. Wang, Q. Long, X. Wen, Y. Zhou, and L. Li, “Influence of pH on the Stability Characteristics of Nanofluids,” in 2009 Symposium on Photonics and Optoelectronics, Wuhan, 2009, pp. 1–4.
[11] H. Xie, J. Wang, T. Xi, Y. Liu, F. Ai, and Q. Wu, “Thermal conductivity enhancement of suspensions containing nanosized alumina particles,” J. Appl. Phys., vol. 91, no. 7, pp. 4568-4572, 2002.
[12] M. A. Khairul, K. Shah, E. Doroodchi, R. Azizian, and B. Moghtaderi, “Effects of surfactant on stability and thermo-physical properties of metal oxide nanofluids,” Int. J. Heat Mass Transf., vol. 98, pp. 778–787, 2016.
[13] B. Lotfizadeh Dehkordi, S. N. Kazi, M. Hamdi, A. Ghadimi, E. Sadeghinezhad, and H. S. C. Metselaar, “Investigation of viscosity and thermal conductivity of alumina nanofluids with addition of SDBS,” Heat Mass Transf., vol. 49, no. 8, pp. 1109–1115, Aug. 2013.
[14] L. Godson, D. M. Lal, and S. Wongwises, “Measurement of Thermo Physical Properties of Metallic Nanofluids for High Temperature Applications,” Nanoscale Microscale Thermophys. Eng., vol. 14, no. 3, pp. 152–173, Aug. 2010.
[15] H. Xie, H. Gu, M. Fujii, and X. Zhang, “Short hot wire technique for measuring thermal conductivity and thermal diffusivity of various materials,” Meas. Sci. Technol., vol. 17, no. 1, pp. 208–214, 2006.
[16] V. Sridhara and L. N. Satapathy, “Al2O3-based nanofluids: a review,” Nanoscale Res. Lett., vol. 6, no. 1, p. 456, 2011.
[17] S. Mukherjee and S. Paria, “Preparation and Stability of Nanofluids-A Review,” IOSR J. Mech. Civ. Eng., vol. 9, no. 2, pp. 63–69, 2013.
[18] M. F. Zawrah, R. M. Khattab, L. G. Girgis, H. El Daidamony, and R. E. Abdel Aziz, “Stability and electrical conductivity of water-base Al2O3 nanofluids for different applications,” HBRC J., 2015.
[19] T. Mori, I. Inamine, R. Wada, T. Hida, T. Kiguchi, H. Satone, and J. Tsubaki, “Effects of particle concentration and additive amount of dispersant on adsorption behavior of dispersant to alumina particles,” J. Ceram. Soc. Japan, vol. 1178, pp. 917–921, 2009.
[20] L. J. Felicia, J. C. Johnson, and J. Philip, “Effect of Surfactant on the Size, Zeta Potential and Rheology of Alumina Nanofluids,” J. Nanofluids, vol. 3, no. 4, pp. 328–335, Dec. 2014.
[21] W. Xian-Ju and X.-F. Li, “Influence of pH on Nanofluids’ Viscosity and Thermal Conductivity,” Chin. Phys. Lett, vol. 26, no. 5, pp. 56601-1-4, 2009.
[22] R. Sadeghi, S. G. Etemad, E. Keshavarzi, and M. Haghshenasfard, “Investigation of alumina nanofluid stability by UV–vis spectrum,” Microfluid. Nanofluidics, vol. 18, no. 5–6, pp. 1023–1030, May 2015.
[23] E. V. Timofeeva, A. N. Gavrilov, J. M. McCloskey, Y. V. Tolmachev, S. Sprunt, L. M. Lopatina, and J. V. Selinger, “Thermal conductivity and particle agglomeration in alumina nanofluids: Experiment and theory,” Phys. Rev. E, vol. 76, no. 6, Article ID 1203, 2007.
[24] X. Wang, X. Li, and S. Yang, “Influence of pH and SDBS on the Stability and Thermal Conductivity of Nanofluids,” Energy & Fuels, vol. 23, no. 5, pp. 2684–2689, May 2009.
[25] G. Xia, H. Jiang, R. Liu, and Y. Zhai, “Effects of surfactant on the stability and thermal conductivity of Al2O3/de-ionized water nanofluids,” Int. J. Therm. Sci., vol. 84, pp. 118–124, 2014.
[26] L. Godson, D. M. Lal, and S. Wongwises, “Measurement of Thermo Physical Properties of Metallic Nanofluids for High Temperature Applications,” Nanoscale Microscale Thermophys. Eng., vol. 14, no. 3, pp. 152–173, Aug. 2010.
[27] H. Xie, H. Gu, M. Fujii, and X. Zhang, “Short hot wire technique for measuring thermal conductivity and thermal diffusivity of various materials,” Meas. Sci. Technol., vol. 17, no. 1, pp. 208–214, 2006.
[28] S. Mukherjee and S. Paria, “Preparation and Stability of Nanofluids-A Review,” IOSR J. Mech. Civ. Eng., vol. 9, no. 2, pp. 63–69, 2013.