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Surface Tension of Magneto-Rheological Fluids

  • Rahimi, Shai (Faculty of Aerospace Engineering, Lady Davis Bldg., Technion, Israel Institute of Technology) ;
  • Weihs, Daniel (Faculty of Aerospace Engineering, Lady Davis Bldg., Technion, Israel Institute of Technology)
  • Received : 2015.10.21
  • Accepted : 2016.05.23
  • Published : 2016.06.30

Abstract

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.

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