Dielectric relaxation study of aqueous tetraethylene glycol using time domain reflectometry technique in the frequency range 10 MHz to 50 GHz

Ingole, Shital A.; Deshmukh, Avadhut Ramrao; Shinde, R. V.; Kumbharkhane, A.C.

doi:10.1016/j.molliq.2018.09.108

Cited by 17 publications

(3 citation statements)

References 30 publications

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“…It is seen that for all concentrations of binary mixtures, g eff value is < 1, close to unity at 301º K which indicates the insufficient interaction with anti-parallel orientation of electric dipoles (Joshi and Kumbharkhane, 2012;Sengwa et al, 2009;Kadam et al, 2013). The g eff values increases with increase in ACN in CBZ, confirms strong interaction in ACN rich region and weak interactions in CBZ region which is indication of deviation from unity (Shere, 2020;Ingole et al, 2018). Luzar model reveals the effect of hydrogen bonding relationship in dipoles.…”

Section: Kirkwood Correlation Factormentioning

confidence: 94%

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Birajdar¹,

Gaikwad²,

Suryawanshi³

2022

Bangladesh J. Sci. Ind. Res.

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Molecular interactions between CBZ-ACN at 8.845 GHz of microwave frequency region confer structural behavior of molecules such that either monomers or multimers are present in the agreed binary mixtures. Effect of microwave frequency on molecular interactions and hydrogen bonding between C≡N (nitrile) molecule and Cl (chlorine) molecule of CBZ and ACN binary solutions has been studied using X-band microwave technique at 301ºK. Co-operative dynamics and hydrogen bonding between nitrile and chlorine group molecules has been thoroughly explicated thereby obtaining static dielectric constant, excess permittivity, Kirkwood correlation factor using Luzar model and Bruggeman factor. Bangladesh J. Sci. Ind. Res. 57(2), 85-90, 2022

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Section: Kirkwood Correlation Factormentioning

confidence: 94%

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Birajdar¹,

Gaikwad²,

Suryawanshi³

2022

Bangladesh J. Sci. Ind. Res.

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“…TDR-based techniques also drastically reduce the amount of time needed for inspection compared to conventional leak detection techniques; in fact, hundreds-of-meters-long pipes can be inspected with a single measurement operation. Besides, TDR is a well-established technique already used for many applications such as detection and localization of cable defects [ 9 , 10 , 11 , 12 ], monitoring of landslide [ 13 , 14 ], characterization of antennas [ 15 ] and measurement of dielectric properties of materials [ 16 , 17 ], of liquid level in tanks [ 18 ], of soil moisture [ 19 ], of water diffusion in irrigation [ 20 ] among many others, even in the biomedical field [ 21 ]. A possible disadvantage of TDR-based water leak detection is that the SE must be installed near the water pipe, and, hence, it is difficult to use the technique in existing pipelines.…”

Section: Introductionmentioning

confidence: 99%

Accurate Detection and Localization of Water Pipe Leaks through Model-Based TDR Inversion

Scarpetta

Cataldo

Spadavecchia

et al. 2023

Sensors

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The problem of water scarcity affects many areas of the world due to water mismanagement and overconsumption and, more recently, to climate change. Monitoring the integrity of distribution systems is, therefore, increasingly important to avoid the waste of clean water. This paper presents a new signal processing technique for enhancing the performance of the methodology of leak detection in water distribution pipes based on time domain reflectometry (TDR). The new technique is based on a particular kind of TDR inversion (spatial TDR) based on a “gray-box” lumped parameter model of the system. The model does not include, e.g., radiative phenomena, non-TEM (transverse electromagnetic) modes etc. but is capable of reproducing accurately the complicated reflectograms obtained by a TDR leak detection system assuming a proper profile of capacitance per unit length along the sensing element. Even more importantly, the model is identified using only the reflectograms taken by the system with very little prior information about the system components. The developed technique is able to estimate with good accuracy, from reflectograms with unclear or ambiguous interpretation, the position and the extension of a region where water is located. The measurement is obtained without prior electromagnetic characterization of the TDR system components and without the need of modeling or quantifying a number of electromagnetic effects typical of on-site measurements.

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“…To gain the insight of structure and dynamics of glycol systems, dielectric relaxation study plays a vital role. 20 In this paper, we have obtained the outcomes of dielectric behavior of EGME and water mixtures using Time Domain Reflectometry (TDR) at different temperatures by extending the frequency range from 10 MHz to 50 GHz. The least square fit method was undertaken to gain static dielectric constant, permittivity at high frequency, dielectric relaxation time.…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation study of aqueous ethylene glycol mono-methyl ether (EGME) with water using time domain reflectometry technique in the frequency range 10MHz to 50GHz

Khan¹,

Lokhande

Deshmukh

et al. 2020

J. Adv. Dielect.

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The Complex permittivity spectra of glycol ether (GE) compounds such as ethylene glycol mono-methyl ether (EGME) with water mixture over entire concentration range and in temperature range of 10–25∘C have been determined using Time Domain Reflectometry (TDR) technique in the frequency range 10[Formula: see text]MHz to 50[Formula: see text]GHz. The complex permittivity spectra for EGME-water were fitted in the Cole–Davidson model. The Static dielectric constant ([Formula: see text], Relaxation time ([Formula: see text], effective Kirkwood correlation factor ([Formula: see text], excess permittivity ([Formula: see text], thermodynamic parameters (activation enthalpy and activation entropy) and Bruggeman factor ([Formula: see text] have been calculated by the nonlinear least square fit method. The intermolecular interactions between EGME-water binary mixtures suggest the nonlinear behavior of dielectric parameters. The contribution of hydrogen bonding interactions among the solute–solvent mixtures is confirmed by Excess properties and Bruggeman factor.

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Dielectric relaxation study of aqueous tetraethylene glycol using time domain reflectometry technique in the frequency range 10 MHz to 50 GHz

Cited by 17 publications

References 30 publications

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Accurate Detection and Localization of Water Pipe Leaks through Model-Based TDR Inversion

Dielectric relaxation study of aqueous ethylene glycol mono-methyl ether (EGME) with water using time domain reflectometry technique in the frequency range 10MHz to 50GHz

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Dielectric relaxation study of aqueous tetraethylene glycol using time domain reflectometry technique in the frequency range 10 MHz to 50 GHz

Cited by 17 publications

References 30 publications

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions

Accurate Detection and Localization of Water Pipe Leaks through Model-Based TDR Inversion

Dielectric relaxation study of aqueous ethylene glycol mono-methyl ether (EGME) with water using time domain reflectometry technique in the frequency range 10MHz to 50GHz

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Dielectric relaxation study of aqueous tetraethylene glycol using time domain reflectometry technique in the frequency range 10 MHz to 50 GHz