High-temperature, high-pressure viscosity of n-octane and isooctane

Baled, Hseen O.; Koronaios, Peter; Xing, Dazun; Miles, R. B.; Tapriyal, Deepak; Gamwo, Isaac K.; Newkirk, Matthew S.; Mallepally, Rajendar R.; McHugh, Mark A.; Enick, Robert M.

doi:10.1016/j.fuel.2015.09.071

Cited by 14 publications

(7 citation statements)

References 36 publications

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“…In this approach density data reported by NIST36 are used when optimizing L, α, and B for each isotherm. The initial results show that L remains fairly constant which is not surprising since L is a characteristic length parameter related to the size of the molecule49 and is only expected to vary from compound to compound. However, with increasing temperature α increases and B decreases, which are correlated according to Equations 16 and 17.…”

mentioning

confidence: 89%

High-temperature, high-pressure viscosities and densities of toluene

Rowane

Mallepally

Bamgbade

et al. 2017

The Journal of Chemical Thermodynamics

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I thank Professor Mark A. M c Hugh for his guidance throughout my undergraduate and graduate education. Dr. M c Hugh's guidance has truly been a significant factor in my growing love for the field of chemical engineering. Lastly, I would like to note that Dr. M c Hugh has never failed to keep me entertained and inspired through his lectures. It has been a pleasure working with Dr. M c Hugh. I would also like to thank Dr. Reddy Mallepally for working closely with me and teaching me how to perform high-pressure experiments. I appreciate Dr. Mallepally's guidance as it has been an integral part of my development as a researcher. In addition, I thank Dr. Babatunde Bamgbade for always lending a helping hand and offering me additional advice from his previous experiences.

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mentioning

confidence: 89%

High-temperature, high-pressure viscosities and densities of toluene

Rowane

Mallepally

Bamgbade

et al. 2017

The Journal of Chemical Thermodynamics

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“…The working equation for the calibration constant, k , of a rolling-ball viscometer is where k has units of (m 3 /s 2 ), μ is the viscosity (Pa·s), v is the terminal velocity (m/s) of the rolling ball, ρ b and ρ fl are the ball density and fluid density (kg/m 3 ), respectively, and θ is the angle of inclination measured with a digital protractor (Model Pro 3600, Applied Geomechanics, accurate to within ±0.1°). The viscometer is calibrated with squalane.…”

Section: Methodsmentioning

confidence: 99%

“…Rolling-Ball Viscometer. The windowed, variable-volume, rolling-ball viscometer used for the present viscosity measurements is described in detail elsewhere 2,15,16 and only the main features are described here. The viscometer, constructed from Inconel 718, has an inside diameter (ID) of 1.5875 cm and a maximum working volume of 50 cm 3 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Viscosity Measurements of Two Potential Deepwater Viscosity Standard Reference Fluids at High Temperature and High Pressure

et al. 2016

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This paper reports high-pressure viscosity measurements for Krytox GPL 102 lot K2391 and tris(2-ethylhexyl) trimellitate (TOTM). These two viscous liquids have recently been suggested as potential deepwater viscosity standard (DVS) reference fluids for high temperature, high pressure viscosity studies associated with oil production from ultradeep formations beneath the deepwaters of the Gulf of Mexico. The measurements are performed using a windowed, variable-volume, rolling-ball viscometer at pressures between 7 and 242 MPa and temperatures between 314 and 527 K with an expanded uncertainty of 3% at a 95% confidence level. The viscosity results are correlated using an empirical temperature/pressure-dependent function and a modified Vogel–Fulcher–Tammann (VFT) Equation. The present viscosity data for TOTM and Krytox GPL 102 lot K2391 are in good agreement with the available reported data in the literature at lower temperatures and pressures. The viscosity values of TOTM and Krytox GPL 102 lot K2391 are 9.5 mPa·s and 25 mPa·s, respectively, at 473 K and 200 MPa, whereas the desired DVS viscosity value at this condition is 20 mPa·s. Although the viscosity of Krytox GPL 102 lot K2391 is closer to the targeted value, a comparison of the present viscosity results with data obtained for lot K1537 indicates a very large lot-to-lot variation of the viscosity for this polydisperse perfluoropolyether oil, which represents a significant deficiency for a DVS.

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“…The windowed, variable-volume, rolling-ball viscometer described in detail in our previous publications − is used in this study. The viscometer is calibrated with n -dodecane over the entire temperature (298–573 K) and pressure (5–100 MPa) ranges of interest to account for the effect of high temperature and pressure on the ball and viscometer diameters.…”

Section: Experimental Sectionmentioning

confidence: 99%

Viscosity Measurements of Rocket Propellant RP-2 Over Wide Ranges of Temperature and Pressure

et al. 2020

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Rocket propellants are subjected to extreme thermodynamic conditions in high-performance liquid rocket engines, with temperatures in excess of 700 K and pressures nearing 100 MPa. Knowledge of the fuel viscosity is crucial for modeling the performance of liquid rocket engines utilizing rocket grade kerosene rocket propellant 1 (RP-1) or RP-2. The present study reports the viscosity of two RP-2 fuel samples at temperatures from 298 to 573 K and pressures up to 100 MPa. A high-temperature, high-pressure (HTHP), variable-volume, close-clearance, windowed, rolling-ball viscometer is used to measure the viscosity based on terminal velocity and RP-2 density. To facilitate the use of the RP-2 viscosity data with computational fluid dynamics (CFD) and other analytical models, these data are modeled with the free volume theory (FVT), with an empirical temperature/pressure-dependent correlation and with a modified form of the Vogel–Fulcher–Tammann (VFT) equation.

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High-temperature, high-pressure viscosity of n-octane and isooctane

Cited by 14 publications

References 36 publications

High-temperature, high-pressure viscosities and densities of toluene

High-temperature, high-pressure viscosities and densities of toluene

Viscosity Measurements of Two Potential Deepwater Viscosity Standard Reference Fluids at High Temperature and High Pressure

Viscosity Measurements of Rocket Propellant RP-2 Over Wide Ranges of Temperature and Pressure

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