Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Wetting Behavior and Evaporation Characteristics of Nanofluid Droplets on Glass Surfaces

나노유체 액적의 젖음거동 및 증발 특성

  • Received : 2012.01.31
  • Accepted : 2012.03.12
  • Published : 2012.03.30
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Abstract

This study investigates experimentally evaporation characteristics of nanofluid droplets containing 50 nm alumina($Al_2O_3$) particles and the wettability changes on a hydrophilic glass surfaces. From the captured digital images by using a CMOS camera and a magnifying lens, we examined the effect of particle concentration on droplet evaporation rate which can be indirectly deduced from the measured droplet volumes varying with time. In particular, with the use of a digital image analysis technique, the present study measured droplet perimeters and the contact angles to study the wetting dynamics during evaporating process. In addition, we compared the measured total evaporation time with theoretically estimated values. It was found that as the volume fractions of nanofluid increased, the total evaporation time and the initial contact angles decreased, while the droplet perimeters increased.

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References

  1. Y. Xuan and Q. Li, "Heat transfer enhancement of nanofluids", Int. J. Heat Fluid Flow, Vol. 21, Issue. 4, 2000, pp. 58-64. https://doi.org/10.1016/S0142-727X(99)00067-3
  2. J. A. Eastman, S. U. S. Choi, S. Li, W. Yu and L. J. Thopson, "Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles", Appl. Phys. Lett., Vol. 78, Issue. 6, 2001, pp. 718-720. https://doi.org/10.1063/1.1341218
  3. 장석필, "나노유체의 기술 현황 및 미래", 기계저널, 2006, 제46권, 제7호, pp. 34-36.
  4. 이지환, 장석필, "알루미나 나노유체의 유동 특성에 관한 연구", 대한설비공학회 2005 동계학술발표대회논문집, 2005, 제 25권, pp. 546-551.
  5. S. Vafaei, T. Borca-Tasciuc, M. Z. Podowski, A. Purkayastha, G. Ramanath and P. M. Ajayan, "Effect of nanoparticles on sessile droplet contact angle", Nanotechnology, Vol. 17, Issue. 10, 2006, pp. 2523-2527. https://doi.org/10.1088/0957-4484/17/10/014
  6. K. Sefinae and R. Bennacer, "Nanofluids droplets evaporation kinetics and wetting dynamics on rough heated substrates", Adv. Colloid Interface Sci., Vol. 147-148, Issue. C, 2009, pp. 263-271. https://doi.org/10.1016/j.cis.2008.09.011
  7. S. Vafaei, A. Purkayastha, A. Jain, G. Ramanath and T. Borca-Tasciue, "The effect of nanoparticles on the liquid- gas surface tension of $Bi_2Te_3$ nanofluids", Nanotechnology, Vol. 20, 2009, 185702(6pp). https://doi.org/10.1088/0957-4484/20/18/185702
  8. Z. H. Liu, X. F. Yang and J. G. Xiong, "Boiling characteristics of carbon nanotube suspensions under subatmospheric pressures", Int. J. Therm. Sci., Vol. 49, Issue. 7, 2010, pp. 1156-1164. https://doi.org/10.1016/j.ijthermalsci.2010.01.023
  9. C. H. Chon, S. W. Paik, J. B. Tipton and K. D. Kihm, "Effect of nanoparticle sizes and number densities on the evaporation and dryout characteristics for strongly pinned nanofluid droplet", Langmuir, Vol. 23, Issue. 6, 2007, pp. 2953-2960. https://doi.org/10.1021/la061661y
  10. R. H. Chen, T. X. Phuoc and D. Martello, "Effect of nanoparticles on nanofluid droplet evaporation", Int. J. Heat Mass Transfer, Vol. 53, Issue. 19-20, 2010, pp. 3677-3682. https://doi.org/10.1016/j.ijheatmasstransfer.2010.04.006
  11. D. H. Shin, S. H. Lee, J. Y. Jung and J. Y. Yoo, "Evaporating characteristics of sessile droplet on hydrophobic and hydrophilic surfaces", Microelectronic Eng., Vol. 86, Issue. 4-6, 2009, pp. 1350-1353. https://doi.org/10.1016/j.mee.2009.01.026
  12. V. P. Carey, "Liquid-vapor phase-change phenomena", Taylor and Francis, London, 2008.
  13. R. Prasher, D. Song and J. Wang, "Measurements of nanofluids viscosity and its implications for thermal application", Appl. Phys. Lett., Vol. 89, Issue. 13, 2006, 133108(3pp). https://doi.org/10.1063/1.2356113
  14. S. Vafaei, D. Wen and T. Borca-Tasciuc, "Nanofluid surface wettability through asymptotic contact angle", Langmuir, Vol. 27, Issue. 6, 2011, 2211-2218. https://doi.org/10.1021/la104254a
  15. H. Hu and R. G. Larson, "Evaporation of a sessile droplet on a substrate", J. Phys. Chem. B, Vol. 106, Issue. 6, 2002, pp. 1334-1344. https://doi.org/10.1021/jp0118322
  16. T. Lim, J. J. Jeong, J. Chung and J. T. Chung, "Evaporation of inkjet printed pico-liter droplet on heated substrates with different thermal conductivity", J. Mech. Sci. Technol., Vol. 23, Issue. 7, 2009, pp. 1788-1794. https://doi.org/10.1007/s12206-009-0604-0
  17. Y. O. Popov, "Evaporative deposition patterns: spatial dimensions of the deposit", Phys. Rev. E, Vol. 71, Issue. 3, 2005, 036313(17pp).

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