Experimental study of the density and viscosity of polyethylene glycols and their mixtures at temperatures from 293K to 465K and at high pressures up to 245MPa

Sagdeev, Damir I.; Fomina, M.; Mukhamedzyanov, G. Kh.; Abdulagatov, Ilmutdin M.

doi:10.1016/j.fluid.2011.11.022

Cited by 49 publications

(43 citation statements)

References 66 publications

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“…We estimate the uncertainty is 4 % for the liquid phase between 288 K and 373 K at atmospheric pressure. The data of Sagdeev et al (Sagdeev, Fomina, Mukhamedzyanov, & Abdulagatov, 2012) extend to very high pressures (245 MPa) and we show comparisons up to 50 MPa. The highpressure data were not used in the regression, as we were unable to find parameters that fit the high-pressure data, and we limit the use of the equation to 10 MPa.…”

Section: Ethylene Glycolsupporting

confidence: 68%

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Huber¹

2018

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We describe models for the viscosity, thermal conductivity, and surface tension for selected fluids implemented in version 10.0 of the NIST computer program, NIST Standard Reference Database 23, also known as NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP). These fluids do not presently have published reference fluid quality models in the open literature, so we provide preliminary models based on available data as an interim measure to allow calculations of these properties. Comparisons with available experimental data are given.

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Section: Ethylene Glycolsupporting

confidence: 68%

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Huber¹

2018

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“…, the measured values of the viscosity of oleic acid decrease rapidly as the temperature initially increases above 293 K. At high temperatures, the viscosity asymptotically approaches a high‐temperature limit ( η → η ∞ ). In general, the same temperature behavior of the viscosity was found for all studied liquids (see, for example, our previous studies Sagdeev et al, , , , , , , , , , , ; Usmanov et al, ).…”

Section: Resultssupporting

confidence: 81%

“…where b 0 is the viscosity (mPa s), η = η ∞ , at the high temperature limit ( T → ∞, i.e., viscosity of the system in the vapor state); b 1 = ε a / R (viscosity Arrhenius energy), and ε a = Δ H are the flow activation energy (enthalpy of activation, related to the enthalpy of vaporization), where T is in K. This equation was used previously by many authors to represent the temperature dependence of the experimental viscosity data for different types of molecular liquids and liquid mixtures (see, for example our previous publications Sagdeev et al, , , , , , , , , , , ; Usmanov et al, ). However, very limited simple pure and binary systems obey the linear Arrhenius behavior (Eq. )…”

Section: Resultsmentioning

confidence: 99%

“…Only a brief review and essential information will be given here. The HWD is based on the hydrostatic weighing principle (see also our earlier publications Sagdeev et al, , , , , , , , , , , ; Usmanov et al, ). The present version of the HWD was modified by immersing the cooler‐screen‐10 (see Fig.…”

Section: Methodsmentioning

confidence: 99%

“…As part of continuing studies (Sagdeev et al, , , , , , ; Usmanov et al, ) of the effect of temperature and pressure on the thermophysical properties of working fluids, the density and viscosity measurements were made for oleic acid, using a modified hydrostatic weighing densimeter (HWD), over a wide temperature range at atmospheric pressure. The HWD was used in our previous publications for accurate measurements of the density and viscosity of pure liquids (Sagdeev et al, , , , , , , , , ) and liquid mixtures (Sagdeev et al, , , , , , ) at temperatures from (273.15 to 413.15) K and at pressures up to 140 MPa. Recently, (Sagdeev et al, ) a modified HWD instrument was employed to measure density of high‐viscosity working liquids for diffusion vacuum pumps over a wide temperature range (273 to 473) K at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

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Densities and Viscosities of Oleic Acid at Atmospheric Pressure

Sagdeev

Gabitov

Isyanov

et al. 2019

J Americ Oil Chem Soc

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The densities of oleic acid were measured over the temperature range from (293 to 459) K at atmospheric pressure using a densimeter based on the modified hydrostatic weighing method. The dynamic viscosities of the same oleic acid sample were measured using a capillary viscometer (VPZ-2 m) in the range from (293 to 363) K at atmospheric pressure. The combined expanded uncertainty of the density, atmospheric pressure, viscosity, and temperature measurements at the 95% confidence level with a coverage factor of k = 2 is estimated to be 0.15%, 1.0%, 3.5%, and 15 mK, respectively. The values of uncertainty for density and viscosity include the effects of purity and calibration (total expanded uncertainty). These experimental data were used to develop wide-range correlations for the density and viscosity based on theoretically confirmed Arrhenius-Andrade and Vogel-Tamman-Fulcher (VTF) models. The value of the glass temperature (T g =179.78 K.) for the oleic acid was estimated using the VTF parameters derived from the present viscosity measurements. To additionally validate the reliability of the measured density data, the same oleic acid samples were measured using the pycnometric method. The present study showed that the densities measured using the modified hydrostatic weighing densimeter (HWD) agree with the values obtained using the pycnometric method within 0.09% for Sample 1 and 0.25% for Sample 2.

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Viscosity of 2-(2-hydroxyethoxy)ethanol

Wohlfarth¹

2017

Viscosity of Pure Organic Liquids and Binary Liquid Mixtures

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Experimental study of the density and viscosity of polyethylene glycols and their mixtures at temperatures from 293K to 465K and at high pressures up to 245MPa

Cited by 49 publications

References 66 publications

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Densities and Viscosities of Oleic Acid at Atmospheric Pressure

Viscosity of 2-(2-hydroxyethoxy)ethanol

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