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Assael, Marc J.; Avelino, Helena Maria da Nóbrega Teixeira; Dalaouti, N. K.; Fareleira, João M. N. A.; Harris, Kenneth R.

doi:10.1023/a:1010774932124

Cited by 90 publications

(100 citation statements)

References 20 publications

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“…In Table II [15]) has been detected within the experimental precision of the measurements. Furthermore, it should be noted that, for the same experimental conditions, measurements were performed for both modes of operation and the values are appropriately identified in Table II. For comparison purposes we used the viscosity correlation developed by Assael et al [15], which has an estimated uncertainty of ± 2.7% within a 95% confidence limit.…”

Section: Experimental Measurementsmentioning

confidence: 56%

“…A new correlation for the density of toluene has been developed by Assael et al [15], based on experimental data from 198 to 380 K and up to 280 MPa. This Tait-type correlation, with a claimed uncertainty of ± 0.1%, within 95% confidence limits, has been used in the present work in order to provide the density of liquid toluene over the temperature and pressure ranges of the viscosity measurements.…”

Section: Density Datamentioning

confidence: 99%

“…Furthermore, it should be noted that, for the same experimental conditions, measurements were performed for both modes of operation and the values are appropriately identified in Table II. For comparison purposes we used the viscosity correlation developed by Assael et al [15], which has an estimated uncertainty of ± 2.7% within a 95% confidence limit. This correlation, based on the most recent experimental data, covers a temperature range from 213 to 373 K and a pressure range from atmospheric up to 250 MPa.…”

Section: Experimental Measurementsmentioning

confidence: 99%

“…This correlation, based on the most recent experimental data, covers a temperature range from 213 to 373 K and a pressure range from atmospheric up to 250 MPa. However, at low temperatures and high densities the uncertainty in the correlation is the greatest [15] (up to 4% for density values above 920 kg · m −3 ) because of the scarcity of the experimental data and their dispersion. Indeed, it should be pointed out that the present work provides the first measurements below 217 K.…”

Section: Experimental Measurementsmentioning

confidence: 99%

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Viscosity Measurements of Liquid Toluene at Low Temperatures Using a Dual Vibrating-Wire Technique

Caetano

Mata

Fareleira³

et al. 2004

International Journal of Thermophysics

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A recently developed dual vibrating-wire technique has been used to perform viscosity measurements of liquid toluene in the temperature range 213 K [ T [ 298 K, and at pressures up to approximately 20 MPa. The results were obtained by operating the vibrating-wire sensor in both forced and free decay modes. The estimated precision of the viscosity measurements, in either mode of operation, is ± 0.5%, for temperatures above or equal to 273 K, increasing with decreasing temperature up to ± 1% at 213 K. The corresponding overall uncertainty is estimated to be within ± 1% and ± 1.5%, respectively.

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Section: Experimental Measurementsmentioning

confidence: 56%

Section: Density Datamentioning

confidence: 99%

Section: Experimental Measurementsmentioning

confidence: 99%

Section: Experimental Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Viscosity Measurements of Liquid Toluene at Low Temperatures Using a Dual Vibrating-Wire Technique

Caetano

Mata

Fareleira³

et al. 2004

International Journal of Thermophysics

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“…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%

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.

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The Viscosity and Density of n-Dodecane and n-Octadecane at Pressures up to 200�MPa and Temperatures up to 473 K

Caudwell

Trusler

Vesovic

et al. 2004

International Journal of Thermophysics

198

147

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A vibrating-wire instrument for simultaneous measurement of the density and viscosity of liquids under conditions of high pressure is described. The instrument is capable of operation at temperatures between 298.15 and 473.15 K at pressures up to 200 MPa. Calibration was performed by means of measurements in vacuum, air, and toluene at 298.15 K. For n-dodecane measurements were made along eight isotherms between 298.15 and 473.15 K at pressures up to 200 MPa, while for n-octadecane measurements were measured along seven isotherms between 323.15 and 473.15 K at pressures up to 90 MPa. The estimated uncertainty of the results is 2% in viscosity and 0.2% in density. Comparisons with literature data are presented.

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Cited by 90 publications

References 20 publications

Viscosity Measurements of Liquid Toluene at Low Temperatures Using a Dual Vibrating-Wire Technique

Viscosity Measurements of Liquid Toluene at Low Temperatures Using a Dual Vibrating-Wire Technique

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

The Viscosity and Density of n-Dodecane and n-Octadecane at Pressures up to 200�MPa and Temperatures up to 473 K

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