Complex permittivity of sodium chloride solutions at microwave frequencies

Peyman, Azadeh; Gabriel, Camelia; Grant, E H

doi:10.1002/bem.20271

Cited by 246 publications

(209 citation statements)

References 16 publications

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“…The experimental data were taken from Peyman et al 40 solvents. The dipole fluctuation expression (6) is valid only for rigid molecular models (more rigorously, for point dipoles, which still can be considered as a good approximation for water molecules).…”

Section: Resultsmentioning

confidence: 99%

“…As expected, dielectric permittivity decreases with temperature. We compare the computed values of the dielectric permittivity with experimental data for pure water 40 as well as for 1 M NaCl solution (for the latter, experimental data are available only for a limited temperature interval 5-35 1C, and they were complemented by an extrapolation formula from work 40). Finally, we have computed dielectric permittivity directly from atomistic simulations using the following expression for water dipoles fluctuations 41 :…”

Section: Effective Potentials With Temperature-dependent Dielectric Pmentioning

confidence: 99%

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Effective solvent mediated potentials of Na+ and Cl− ions in aqueous solution: temperature dependence

Mirzoev

Lyubartsev

2011

Phys. Chem. Chem. Phys.

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The effective solvent-mediated potentials for Na + and Cl À ions in aqueous solution were calculated in a wide range of temperatures from 0 to 100 1C. The potentials have been determined using the inverse Monte Carlo approach, from the ion-ion radial distribution functions computed in 50 ns molecular dynamics simulations of ions and explicit water molecules. We further separated the effective potentials into a short-range part and an electrostatic long-range part represented by a coulombic potential with some dielectric permittivity. We adjusted the value of the dielectric permittivity to provide the fastest possible decay of the short-range potentials at larger distances. The obtained temperature dependence of the dielectric permittivity follows well the experimental data. We show also that the largest part of the temperature dependence of the effective potentials can be attributed to the temperature-dependent dielectric permittivity.

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Section: Resultsmentioning

confidence: 99%

Section: Effective Potentials With Temperature-dependent Dielectric Pmentioning

confidence: 99%

Effective solvent mediated potentials of Na+ and Cl− ions in aqueous solution: temperature dependence

Mirzoev

Lyubartsev

2011

Phys. Chem. Chem. Phys.

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“…The parameters are calculated from empirical relationships derived from the literature [8]. From equation (4), we have determined the real and imaginary part of the complex permittivity for different NaCl solutions for small concentrations (less than 10 mg/ml) in the frequency band 1-6 GHz.…”

Section: Theoretical Analysismentioning

confidence: 99%

Microwave Interferometry Based On Open-ended Coaxial Technique for High Sensitivity Liquid Sensing

Bakli

Haddadi

2017

AEM

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This paper describes a modified open-ended coaxial technique for microwave dielectric characterization in liquid media. A calibration model is developed to relate the measured transmission coefficient to the local properties of the sample under test. As a demonstration, the permittivity of different sodium chloride solutions is experimentally determined. Accuracies of 0.17% and 0.19% are obtained respectively for the real and imaginary parts of dielectric permittivity at 5.9 GHz.

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Section: Simulation For Conductivity In Ectmentioning

confidence: 99%

“…In [20], the permittivity changing as the concentrations changing in NaCl solution has been elaborated. And from [20], the relative permittivity change drops from 80.5 to 78.3 when we increase the concentration of saline water from 0 to 50g/L at 20°C. Since the permittivity change is very small within the concentration range of our experiments, the relative permittivity of water is fixed at 80 while the conductivity increases in our forward model.…”

Section: Simulation For Conductivity In Ectmentioning

confidence: 99%

Dual modality ECT–MIT multi-phase flow imaging

Zhang

Soleimani

2015

Flow Measurement and Instrumentation

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Please cite only the published version using the reference above.See http://opus.bath.ac.uk/ for usage policies.Please scroll down to view the document. ABSTRACT-Three-phase flow imaging is a very challenging problem in industrial process tomography. A particular interest here is three phase flow including both conductive and non-conductive phases. Currently there is no robust solution to this problem. Electrical capacitance tomography (ECT) has been applied to visualise the permittivity distribution by measuring inter-capacitance between electrodes around sensing area. Magnetic inductance tomography (MIT) is a technique to image the conductivity distribution through the inductance measurements over the coils around the sensing area. In this paper, the three-phase flow is classified into two scenarios: air background and water background. A dual-modality method of ECT and MIT is proposed to image both the conductive and dielectric components under test. As a result of this experiment, the dual-modality method is able to solve air-background three-phase flow imaging, but a problem has been raised in the waterbackground scenario. The static experiment results are promising for such contactless three phase flow imaging. Dual modality ECT-MIT multi-phase flow imaging

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Complex permittivity of sodium chloride solutions at microwave frequencies

Cited by 246 publications

References 16 publications

Effective solvent mediated potentials of Na+ and Cl− ions in aqueous solution: temperature dependence

Effective solvent mediated potentials of Na+ and Cl− ions in aqueous solution: temperature dependence

Microwave Interferometry Based On Open-ended Coaxial Technique for High Sensitivity Liquid Sensing

Dual modality ECT–MIT multi-phase flow imaging

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