Excess Permittivity for Mixtures at Various Concentrations

2013 ◽  
pp. 25-31
Keyword(s):  
Excess Permittivity

scholarly journals Prediction of Dielectric Constants of (Cyclic Ketone- 1,4-Butanediol) Binary Systems

2020 ◽  
Keyword(s):  
Root Mean Square ◽  
Predictive Models ◽  
Binary Systems ◽  
Dielectric Constants ◽  
Mixing Rules ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Cyclic Ketones ◽  
Excess Permittivity ◽  
Lower Root

In order to predict the permittivity and excess permittivity data of binary systems containing cyclic ketones (cyclohexanone and cyclopentanone) and 1,4-butanediols, various mixing rules were used [1,2]. The permittivity increment, , was also evaluated in this research using the predicted data. x1 and x2 are the mole fractions of the components 1 and 2, and are the permittivities of the pure components. As shown in Fig. 1, the experimental permittivity values for three systems containing 1,4-butanediol (1,4BD) and two cyclic ketones were estimated by several mixing rules. Typically, for cyclohexanone and 1,4-butanediol mixtures, the predicted excess permittivity data were compared and shown in Fig. 2. As it can be seen from Table 1, the Lichteneker-Rother model shows the lower root mean square deviation (rmsd) value, which indicates that the Lichteneker-Rother model presents the best result between the predictive models.

scholarly journals Mixing Formulae and Experimental Results for the Dielectric Constant of Snow

1985 ◽  
Vol 31 (108) ◽  
pp. 163-170 ◽  
Author(s):  
Ari Sihvola ◽  
Ebbe Nyfors ◽  
Martti Tiuri
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Liquid Water ◽  
Complex Permittivity ◽  
Experimental Results ◽  
Exponential Models ◽  
Dielectric Mixture ◽  
Excess Permittivity ◽  
Wet Snow ◽  
Mixture Theories

AbstractThis paper discusses dielectric properties of snow according to various dielectric models and compares them with experimental results. The complex permittivity of wet snow is assumed to consist of two parts, being the sum of the permittivity of dry snow (a mixture of ice and air) and the excess permittivity due to liquid water (resulting from the dielectric mixture of water and air). In particular the effect of liquid water is considered. Exponential models and structure-dependent models based on mixture theories by Taylor and Tinga and others are applied. It is shown that the assumption that water inclusions have the form of either randomly oriented discs or needles, or of spheres do, not get empirical confirmation but the inclusions are preferably prolate ellipsoids (ellipticity 0.16) or oblate ellipsoids (ellipticity 0.12), dry snow being a dielectric mixture of randomly oriented disc-shaped ice particles and air.

Wavelength-dependent excess permittivity as indicator of kerosene in diesel oil

2018 ◽  
Vol 57 (12) ◽  
pp. 2997 ◽  
Author(s):  
Boniphace Kanyathare ◽  
Kai-Erik Peiponen
Keyword(s):  
Diesel Oil ◽  
Excess Permittivity

On the definition of the excess permittivity of a fluid mixture. II

2008 ◽  
Vol 40 (9) ◽  
pp. 1475-1476 ◽  
Author(s):  
T.P. Iglesias ◽  
João Carlos R. Reis ◽  
L. Fariña-Busto
Keyword(s):  
Fluid Mixture ◽  
Excess Permittivity ◽  
Definition Of

Excess permittivity behaviour of some mixturesn-alcohol + alkane: an interpretation of the underlying molecular mechanism

2005 ◽  
Vol 103 (19) ◽  
pp. 2639-2646 ◽  
Author(s):  
T. P. Iglesias * ◽  
J. M. Forniés-Marquina ◽  
B. De Cominges
Keyword(s):  
Molecular Mechanism ◽  
Excess Permittivity

Mixing Formulae and Experimental Results for the Dielectric Constant of Snow

1985 ◽  
Vol 31 (108) ◽  
pp. 163-170 ◽  
Author(s):  
Ari Sihvola ◽  
Ebbe Nyfors ◽  
Martti Tiuri
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Liquid Water ◽  
Complex Permittivity ◽  
Experimental Results ◽  
Exponential Models ◽  
Dielectric Mixture ◽  
Excess Permittivity ◽  
Wet Snow ◽  
Mixture Theories

Abstract This paper discusses dielectric properties of snow according to various dielectric models and compares them with experimental results. The complex permittivity of wet snow is assumed to consist of two parts, being the sum of the permittivity of dry snow (a mixture of ice and air) and the excess permittivity due to liquid water (resulting from the dielectric mixture of water and air). In particular the effect of liquid water is considered. Exponential models and structure-dependent models based on mixture theories by Taylor and Tinga and others are applied. It is shown that the assumption that water inclusions have the form of either randomly oriented discs or needles, or of spheres do, not get empirical confirmation but the inclusions are preferably prolate ellipsoids (ellipticity 0.16) or oblate ellipsoids (ellipticity 0.12), dry snow being a dielectric mixture of randomly oriented disc-shaped ice particles and air.

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