Theoretical investigations of the vapour-liquid equilibrium and dielectric properties of dipolar Yukawa fluids in an external field |
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Authors: | ISTVÁN SZALAI KWONG-YU CHAN YUK WAI TANG |
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Institution: | 1. Department of Physics , University of Veszprém , PO Box 158, H-8201, Veszprém, Hungary;2. Department of Chemistry , The University of Hong Kong , Pokfulam Road, Hong Kong SAR, China |
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Abstract: | In a low field approximation, using the dipolar Yukawa fluid model (in mean spherical approximation as a reference system) a consistent field-dependent free energy expression is proposed for the calculation of the vapour-liquid equilibrium of polar fluids in an applied electric field. A perturbation theory high field approximation expression of the free energy is also proposed to study the field-dependent properties of fluids. In the high field approximation, equations for the field-dependent polarization and for the nonlinear dielectric constant (or Piekara constant) are also predicted. It has been discussed that our approximations are appropriate to describe the vapour-liquid-like phase equilibria and the magnetization curves of magnetic fluids. |
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