Viscosity measurements for squalane at high pressures to 350MPa from T=(293.15 to 363.15)K

Comuñas, Marı́a J. P.; Paredes, Xavier; Gaciño, Félix M.; Fernández, Josefa; Bazile, Jean-Patrick; Boned, Christian; Daridon, Jean-Luc; Galliéro, Guillaume; Pauly, Jérôme; Harris, Kenneth R.

doi:10.1016/j.jct.2013.10.001

Cited by 51 publications

(51 citation statements)

References 53 publications

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“…As a consequence, there is, at present, a demand for new industrial viscosity standards with various viscosities, at high pressures and high temperatures. Industrial viscosity standards with adequate viscosity could be used for calibration and tests of industrial viscometers for use in-well, or on-line, at the adequate working conditions [1][2][3][4][5][6][7][8][9][10]. Since, in industry the range of viscosity of useful fluids varies over several orders of magnitude, a number of "industrial reference materials", covering a large spectrum of practical conditions, are required to calibrate or verify the calibration of those instruments [8].…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, the International Association for Transport Properties (IATP) has been developing efforts in order to respond to the demand of industrial viscosity standards [1][2][3][4][5][6][7][8][9][10]. In particular, IATP has proposed an industrial viscosity standard for moderately high viscosity [DIDP] and, more recently, has created an internal project regarding the search of a high viscosity industrial viscosity standard fluid, and at high pressures and high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, in the last decades, viscosity reference data of low viscosity fluids [12][13][14][15][16] and moderately high viscosity fluids [6,8,9], have been proposed under the auspices of STP-IUPAC and IATP.…”

Section: Introductionmentioning

confidence: 99%

“…However, for two samples from different suppliers but with the same purity (99.8% pure) the difference between their viscosities was within AE0.3%, showing those samples with eventually a different distribution of isomers, but with a similar overall purity, had essentially the same viscosity, well within the experimental uncertainty. Nevertheless, several authors [5,6,9] have recently shown some doubts regarding the use of DIDP as a standard reference fluid. One important reason for this lies in the fact that the supplier of the high purity samples primarily used for the establishment of the DIDP reference data [8] is reported to have discontinued its production [9].…”

Section: Introductionmentioning

confidence: 99%

“…One important reason for this lies in the fact that the supplier of the high purity samples primarily used for the establishment of the DIDP reference data [8] is reported to have discontinued its production [9]. While an alternative liquid is not found, DIDP continues being used to verify the accuracy of some viscometers [26] and also for their calibration [9], and to the knowledge of the present authors, no other pure fluid has been proposed to be a reference fluid for such high viscosity; 123.0 mPa s at 293 K and 0.1 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

Diogo

Avelino

Caetano

et al. 2014

Fluid Phase Equilibria

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A B S T R A C TThe article reports viscosity measurements of compressed liquid tris(2-ethylhexyl) trimellitate or 1,2,4-Benzenetricarboxylic acid, tris(2-ethylhexyl) ester (TOTM) which is an important plasticizer in the polymer industry and has wide applications as a lubricant. Nevertheless, the main motivation for the present work is to propose TOTM as a plausible candidate for an industrial viscosity reference fluid for high viscosity, high pressure and high temperature. This kind of reference fluid is presently on demand by oil industries and the International Association for Transport Properties is developing efforts aiming to select appropriate candidates and to establish the corresponding reference data.The viscosity measurements were performed with a novel vibrating wire sensor. The new instrument was designed for operation at high pressures (up to 100 MPa) and temperatures up to 373 K. The present measurements were obtained using the vibrating wire sensor in the forced oscillation or steady-state mode of operation. The viscosity measurements were carried out up to 65 MPa and at six temperatures from (303 to 373) K.The viscosity results were correlated with density, using a modified hard-spheres scheme. The root mean square deviation of the data from the correlation is 0.53% and the maximum absolute relative deviation was less than 1.7%. The expanded uncertainty of the present viscosity results, at a 95% confidence level, is estimated to be less than AE2% for viscosities up to 68 mPa s, less than AE2.6% for viscosities between (69 and 268) mPa s and less than AE3% for higher viscosities.The TOTM density data necessary to compute the viscosity results were measured using a vibrating Utube densimeter, model DMA HP and are described in part II of the present work.No literature data above atmospheric pressure could be found for the viscosity of TOTM. As a consequence, the present viscosity results could only be compared upon extrapolation of the vibrating wire data to 0.1 MPa. Independent viscosity measurements were performed, at atmospheric pressure, using an Ubbelohde capillary in order to compare with the vibrating wire results, extrapolated by means of the above mentioned correlation. The two data sets agree within AE1%, which is commensurate with the mutual uncertainty of the experimental methods. Comparisons of the literature data obtained at atmospheric pressure with the present extrapolated vibrating-wire viscosity measurements have shown an agreement within AE2% for temperatures up to 339 K and within AE3.3% for temperatures up to 368 K.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

Diogo

Avelino

Caetano

et al. 2014

Fluid Phase Equilibria

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A critical evaluation of film thickness‐derived pressure–viscosity coefficients

Bair

2014

Lubrication Science

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A single parameter, the pressure-viscosity coefficient, α, quantifies the pressure dependence of the viscosity of the liquid in elastohydrodynamic lubrication (EHL). Most published values of α have not been obtained from measurements of viscosity as a function of pressure. Rather, these effective pressure-viscosity coefficients have been derived from the measurement of the EHL film thickness, a more difficult procedure. In this article, five well-characterized liquids that should be Newtonian in the EHL inlet are identified for which film-derived coefficients have been reported. These coefficients are compared with coefficients derived from published viscosity correlations and new viscosity measurements. The film-derived coefficients are found to not be an accurate representation of the piezoviscous response. The procedure of deriving a pressure-viscosity coefficient from a film thickness measurement does not offer an alternative to the simpler and easier viscometer measurement.

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Measurement Methodology of Low-Shear Viscosity of Reference Liquid Under High-Pressure

Hornak

2016

The Latest Methods of Construction Design

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Viscosity measurements for squalane at high pressures to 350MPa from T=(293.15 to 363.15)K

Cited by 51 publications

References 53 publications

Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

A critical evaluation of film thickness‐derived pressure–viscosity coefficients

Measurement Methodology of Low-Shear Viscosity of Reference Liquid Under High-Pressure

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