Automation of an ultrasound velocity measurement system in high-pressure liquids

Ding, Zhong; Alliez, J; Boned, Christian; Xans, P.

doi:10.1088/0957-0233/8/2/007

Cited by 21 publications

(20 citation statements)

References 7 publications

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“…At temperatures between (273.21 and 353.21) K, the data of El Hawary et al agree to within ±0.015% with our data measured at RUB, while a systematically offset of 0.05% can be observed at 253.26 K. The data of El Hawary et al also differs by up to 0.06% at lower temperatures and by up to 0.17% at temperatures near 420.15 K from our data measured at ICL. The speed of sound reported by Ding et al15 deviate from our results by about +0.5% at the lowest pressures, but the deviations diminish with increasing pressure to around 0.1% at p = 100 MPa. Furthermore, the data set of Lainez et al20 is in good agreement with our data measured at ICL at pressures up to 30 MPa.…”

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confidence: 94%

Speeds of Sound in n-Pentane at Temperatures from 233.50 to 473.15 K at Pressures up to 390 MPa

et al. 2020

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We report speeds of sound in n-pentane measured using two similar apparatuses, located at Ruhr University Bochum (RUB) and Imperial College London (ICL), covering different ranges of temperature and pressure. At RUB, measurements were conducted at temperatures from (233.50 to 353.20) K with pressures up to 20 MPa, while temperatures from (263.15 to 473.15) K with pressures up to 390 MPa were covered at ICL. Accounting for the uncertainties in temperature, pressure, path-length calibration, and pulse timing, the relative expanded combined uncertainty (k = 2) in the speed of sound varied from 0.015% to 0.18% over the whole region investigated.Nevertheless, small differences averaging at 0.13% are found between the two data sets in the region of overlap. The experimental data reported in this work have been partly used in the development of a new fundamental equation of state for n-pentane.

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confidence: 94%

Speeds of Sound in n-Pentane at Temperatures from 233.50 to 473.15 K at Pressures up to 390 MPa

et al. 2020

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“…Ultrasound velocity measurement in liquids such as octane and pentane has been demonstrated up to around 1000 bar [11], although the piezoelectric transducers used for the investigation were not deployed into these environments. Instead, ultrasound waves were transmitted through a vessel wall.…”

Section: B Transducers For Environments Of Elevated Pressurementioning

confidence: 99%

Venting in the Comparative Study of Flexural Ultrasonic Transducers to Improve Resilience at Elevated Environmental Pressure Levels

et al. 2020

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“…For argon, we applied the pressure-dependent bulk modulus from Stewart and Jacobsen (1989) and pressure-dependent bulk viscosity from Vidal et al (1979) as used in Li (2016). We obtained similar information for pentane from Audonnet and Pádua (2001) and Ding et al (1997). For the saturation and fluid charging procedure, we applied the protocol described by Li (2016).…”

Section: Permeabilitymentioning

confidence: 99%

Poroelastic Relaxation in Thermally Cracked and Fluid‐Saturated Glass

et al. 2020

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To test theoretical models of modulus dispersion and dissipation in fluid‐saturated rocks, we have investigated the broadband mechanical properties of four thermally cracked glass specimens of simple microstructure with complementary forced‐oscillation (0.004–100 Hz) and ultrasonic techniques (~1 MHz). Strong pressure dependence of moduli (bulk, Young's, and shear), axial strain, and ultrasonic wave speeds for dry conditions attests to essentially complete crack closure at a confining pressure of 15 MPa—consistent with ambient‐pressure crack aspect ratios ≤2 × 10−4. Oscillation of the confining pressure reveals bulk modulus dispersion and a corresponding dissipation peak, near 0.002 Hz only at the lowest effective pressure (2.5 MPa)—attributed to the transition with increasing frequency from the drained to saturated‐isobaric regime. The observations are consistent with Biot‐Gassmann's theory, with dispersion and dissipation adequately represented by Zener model. Above the draining frequency, axial forced‐oscillation tests show dispersion relatively low differential press's modulus and Poisson's ratio, and an associated broad dissipation peak centered near 0.3 Hz, thought to reflect local “squirt” flow and adequately modeled with a continuous distribution of relaxation times over two decades. Observations of Young's and shear moduli dispersion and dissipation from complementary flexural and torsional oscillation measurements for differential pressure ≤10 MPa provide supporting evidence of the transition with increasing frequency from the saturated‐isobaric to the saturated‐isolated regime—also probed by ultrasonic technique. These findings validate predictions from theoretical models of dispersion in cracked media and emphasize need for caution in the seismological application of laboratory ultrasonic data for cracked media.

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Automation of an ultrasound velocity measurement system in high-pressure liquids

Cited by 21 publications

References 7 publications

Speeds of Sound in n-Pentane at Temperatures from 233.50 to 473.15 K at Pressures up to 390 MPa

Speeds of Sound in n-Pentane at Temperatures from 233.50 to 473.15 K at Pressures up to 390 MPa

Venting in the Comparative Study of Flexural Ultrasonic Transducers to Improve Resilience at Elevated Environmental Pressure Levels

Poroelastic Relaxation in Thermally Cracked and Fluid‐Saturated Glass

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