Surface Tension of Magneto-Rheological Fluids Rahimi, Shai; Weihs, Daniel;
Surface tension is a major factor in the thermodynamics as well as fluid properties of Magneto-Rheological Fluids (MRF). We measured the surface tension of an MRF using two different methods. A wettability characterization based on contact angles measurements for the fluid interacting with two different surfaces was conducted. A hydrocarbon based commercial MRF with more than 80% solid weight, placed on quartz and poly-tetra-fluoroethylene (PTFE) surfaces was used. We measured the fluids' surface tension value by means of contact angles measurements and by the falling drop method.
rheology;magnetic fluids;surface tension;
R. E. Rosensweig, Ferrohydrodynamics, Cambridge University Press, Cambridge (1985) pp. 45-61.
M. S. Dababneh, N. Y. Ayoub, I. Odeh, and N. M. Laham, J. Magn. & Magn Mat. 125, 34 (1993).
M. S. Amin, S. Elborai, S. H. Lee, X. He, and M. Zahn, J. Appl. Phys. 97, 10R308 (2005).
C. Flament, S. Lacis, J. C. Bacri, A. Cebers, S. Neveu, and R. Perzynski, Phys. Rev. E 53, 4801 (1996).
M. Racuciu, D. E. Creanga, and Gh. Calugaru, J. Optoelectronics and Adv. Mat. 7, 2859 (2005).
F. M. Fowkes, J. Phys. Chem. 66, 382 (1962).
F. M. Fowkes, J. Phys. Chem. 67, 2538 (1963).
N. J. Hallab, K. J. Bundy, K. M. O'Connor, R. L. Moses, and J. J. Jacobs, Tissue Eng. 7, 55 (2001).
K. J. Kubiak, M. C. T. Wilson, T. G. Mathia, and P. Carval , Wear 271, 523 (2011).