Influence of the Drop Volume and Applied Magnetic Field on the Wetting Features of Water-based Ferrofluids



Abstract Views
276

Downloads
212

Citations

Share

##plugins.themes.bootstrap3.article.sidebar##

Submitted Sep 16, 2020
Published Sep 28, 2020
10.24018/ejeng.2020.5.9.2158

Abstract viewed = 276 times

Table of Contents

##plugins.themes.bootstrap3.article.main##

In this work, the influence of the drop volume and applied magnetic field on the wetting features of water-based ferrofluids, is experimentally investigated. Firstly, water drops with volume in the range of 0.1–100 micro-liters are placed, by using micro-pipettes, on bare and coated acrylic plates, to gain reference data concerning the contact angle. Then, drops of water-based ferrofluid, with the volume ranging from 1 to 10 micro-liters, are set on bare acrylic plates, which are placed into the uniform magnetic field created, in normal direction to the plate, by using permanent magnets. Since the ferrofluid drops are elongated along the magnetic field, the contact angle increases at augmentation of the magnetic flux. Besides, when a critical magnetic flux is exceeded, ferrofluid drop loose contact with the plate and jumps towards the magnet. A heuristic equation to predict the fluctuation of the liquid surface tension versus the drop volume, and also versus the ratio of the applied magnetic field energy to the kinetic energy of the magnetic particles dispersed into the water-based ferrofluid, is suggested.

Keywords: Magnetic field Surface tension Contact angle Wetting Water Water-based ferrofluid Drop Micro-pipette

Downloads

Download data is not yet available.

References

  1. L. Liggieri, A. Sanfeld, and A. Steinchen, “Effects of magnetic and electric fields on surface tension of liquids,” Physica A, vol. 206, pp. 299–331, March 1994.
     Google Scholar
  2. S. Sudo, H. Hashimoto, and A. Ikeda, “Measurements of the surface tension of a magnetic fluid and interfacial phenomena,” JSME International Journal, series II, vol. 32, no. 1, pp. 47–51, Dec. 1989.
     Google Scholar
  3. M.S. Amin, S. Elborai, S.H. Lee, X. He, and M. Zahn, “Surface tension measurement techniques of magnetic fluids at an interface between different fluids, using perpendicular field instability,” Journal of Applied Physics, vol. 97, pp. 10R308.1–3, Aug. 2005.
     Google Scholar
  4. A.M. Imano, and A. Beroual, “Deformation of water droplets on solid surface in electric field,” Journal of Colloid and Interface Science, vol. 298, pp. 869–879, July 2006.
     Google Scholar
  5. A. Bateni, A. Ababneh, J.A.W. Elliot, A.W. Neumann, and A. Amirfazli, “Effect of gravity and electric field on shape and surface tension of drops,” Advances in Space Research, vol. 36, pp. 64–69, Jan. 2005.
     Google Scholar
  6. A. Bateni, S. Laughton, H. Tavana, S.S. Susnar, A. Amirfazli, and A.W. Neumann, “Effect of electric fields on contact angle and surface tension of drops,” Journal of Colloid and Interface Science, vol. 283, pp. 215–222, Aug. 2005.
     Google Scholar
  7. Q. Jiang, Y.C. Chiew, and J.E. Valentini, “Electric field effects on the surface tension of air/solution interfaces,” Colloids and Surfaces A: Physicochemical Engineering Aspects, vol. 83, pp. 161–166, Feb. 1994.
     Google Scholar
  8. A. Bateni, A. Amirfazli, and A.W. Neumann, “Effects of an electric field on the surface tension of conducting drops,” Colloids and Surfaces A: Physicochemical Engineering Aspects, vol. 289, pp. 25–38, Jan. 2006.
     Google Scholar
  9. B. Suciu, “Experimental investigation on a colloidal damper rendered controllable under the variable magnetic field generated by moving permanent magnets,” Journal of Physics: Conference Series, vol. 744, pp. 012014.1–12, Nov. 2016.
     Google Scholar
  10. C.V. Suciu, “Investigations on a smart nano-energy absorption system,” Advanced Materials Research, vol. 123-125, pp. 987–990, Aug. 2010.
     Google Scholar
  11. R.F. Gould (Ed.), Contact Angle, Wettability, and Adhesion, in Advances in Chemistry Series. Washington DC: Am. Chem. Soc., 1964, pp. 121–138.
     Google Scholar
  12. R.E. Johnson Jr., R.H. Dettre, in E. Matijevic (Ed.), Surface and Colloid Science. New York: Wiley–Interscience, 1969, p. 85.
     Google Scholar
  13. H. Butt, K. Graf, and M. Kappl, Physics and Chemistry of Interfaces. New York: Wiley–Interscience, 2003, pp. 171–183.
     Google Scholar
  14. A.F.M. Barton, Handbook of Polymer–Liquid Interaction Parameters and Solubility Parameters. New York: CRC Press, 1990, pp. 221–238.
     Google Scholar