A rolling ball viscometer for high pressure use

Nishibata, Ken; Izuchi, M.

doi:10.1016/0378-4363(86)90725-4

Cited by 9 publications

(7 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specific features of the rolling-ball viscometer are digital angular positioning of the cell via a computer-controlled stepper motor (Oriental Motor Co. Ltd., ASM46AA-T20), a cell body that is constructed from light-weight titanium (JIS Class 2), a movable piston with position sensing by a linear-variable differential transformer (LVDT) (Shinko Denshi Co. Ltd., WA-2S and A22-3), and a sapphire window for visual observation. The apparatus uses the rolling-ball principle for measurements, since this method allows for the study of both low-and high-pressure measurements [2], and its principle has been confirmed for both paint and coating mixtures [3], CO 2 containing mixtures [4,5], and fluid mixtures at high pressures [6][7][8]. The digital angular positioning of the cell allows for highly reproducible initial conditions to within 0.05 • to be maintained.…”

Section: Methodsmentioning

confidence: 97%

A Digital Variable-Angle Rolling-Ball Viscometer for Measurement of Viscosity, Density, and Bubble-Point Pressure of CO2 and Organic Liquid Mixtures

et al. 2008

View full text Add to dashboard Cite

A new apparatus was developed for measuring the viscosity, density, and bubble-point pressure of CO 2 and organic liquid mixtures. The apparatus is based on the rolling-ball principle and consists of a computer-controlled stepper motor that rotates a high-pressure cell that is equipped with a sapphire window, a movable piston, and a position-sensing device. Design of the high-pressure cell was made such that compositions could be determined by mass. The viscosity was determined by sensing the speed of a rolling ball, and the density was determined by sensing the position of the piston with a linear-variable differential transformer. Bubble-point pressures were measured with the synthetic method. The viscosity and density of octane and decane were measured, and the average deviations of these properties compared with reliable literature values were 1.1 % and 0.15 %, respectively. The viscosity and density of CO 2 + tetrahydrofuran system were measured at a temperature of 60 • C, a pressure of 10.2 MPa, and CO 2 mole fractions up to 0.3. Bubble-point pressures for the CO 2 + tetrahydrofuran system were in good agreement with literature data.

show abstract

Section: Methodsmentioning

confidence: 97%

A Digital Variable-Angle Rolling-Ball Viscometer for Measurement of Viscosity, Density, and Bubble-Point Pressure of CO2 and Organic Liquid Mixtures

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Percentage deviations of the viscosity measurements of bis(2-ethylhexyl) sebacate as a function of temperature, from the values obtained by eq : ●, this work; ○, Paredes et al; ■, Bair; ⊞, King et al; ▲, Vergne; −, Nishibata and Izuchi; □, Hirst and Moore; ⬓, Novak and Winer; △, Kleinschmidt et al …”

Section: Experimental Sectionmentioning

confidence: 63%

“…Vergne employed a falling-cylinder viscometer with a quoted uncertainty of 1 %; his values show a maximum deviation of 3.9 % from the values obtained by eq . Nishibata and Izuchi also employed a rolling-body viscometer with a 1 % uncertainty, but published only an equation that deviates up to 4.5 % from the values obtained by eq , as shown in Figure . Hirst and Moore has only published one viscosity measurement with no details.…”

Section: Experimental Sectionmentioning

confidence: 99%

Measurements of the Viscosity of Bis(2-ethylhexyl) Sebacate, Squalane, and Bis(2-ethylhexyl) Phthalate between (283 and 363) K at 0.1 MPa

et al. 2013

View full text Add to dashboard Cite

New measurements of the viscosity of bis(2-ethylhexyl) sebacate, squalane, and bis(2-ethylhexyl) phthalate at temperatures between (283 and 363) K at 0.1 MPa are presented. These liquids are being examined as possible industrial reference fluids for moderately high viscosity. The measurements of these three moderately viscous liquids were performed in a recently developed new vibrating-wire viscometer with an absolute expanded uncertainty of ±1.5 %. The measurements were fitted to an Arrhenius-type equation with an overall uncertainty of 0.43 %, 0.84 %, and 0.56 % (at the 95 % confidence level), respectively.

show abstract

“…This apparatus was already applied by Carmichael [18] for the measurement of the viscosity of liquid ammonia between 4 1C and 104 1C. Rolling ball viscometers are already used for high pressure [19] or high temperature applications [20]. Funakoshi et al could determine with the use of X-ray detection, the viscosity even in extreme conditions like pressures between 5 GPa to 20 GPa and temperatures over 1500 1C or even 2000 1C may be feasible [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of density and viscosity measurements under ammonothermal conditions

Steigerwald

Alt

Hertweck

et al. 2014

Journal of Crystal Growth

View full text Add to dashboard Cite

A rolling ball viscometer for high pressure use

Cited by 9 publications

References 6 publications

A Digital Variable-Angle Rolling-Ball Viscometer for Measurement of Viscosity, Density, and Bubble-Point Pressure of CO2 and Organic Liquid Mixtures

A Digital Variable-Angle Rolling-Ball Viscometer for Measurement of Viscosity, Density, and Bubble-Point Pressure of CO2 and Organic Liquid Mixtures

Measurements of the Viscosity of Bis(2-ethylhexyl) Sebacate, Squalane, and Bis(2-ethylhexyl) Phthalate between (283 and 363) K at 0.1 MPa

Feasibility of density and viscosity measurements under ammonothermal conditions

Contact Info

Product

Resources

About