Quantitative multiphase flow characterisation using an Earth's field NMR flow meter

O’Neill, Keelan; Klotz, Adeline; Stanwix, Paul L.; Fridjonsson, Einar O.; Johns, Michael L.

doi:10.1016/j.flowmeasinst.2017.10.004

Cited by 23 publications

(6 citation statements)

References 42 publications

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“…It is therefore very popular to employ this technique in low-cost low-field MR spectrometers. Beyond the two kinds of MR-based methods, O'Neill et al invented an Earth's field magnetic resonance flow meter to measure the velocity probability distribution and T1-velocity probability distribution of multiphase flow [40][41][42].…”

Section: Song Et Al (2005) Employed the Multiple Modulation Multiple ...mentioning

confidence: 99%

Laminar flow characterization using low-field magnetic resonance techniques

et al. 2021

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Laminar flow velocity profiles depend heavily on fluid rheology. Developing methods of laminar flow characterization, based on low-field magnetic resonance (MR), contributes to the widespread industrial application of the MR technique in rheology.In this paper, we designed a low-cost, palm-sized permanent magnet with a 1 H resonance frequency of 20.48 MHz to measure laminar flow. The magnet consists of two disk magnets, which were each tilted at an angle of 1˚ from a starting separation of 1.4 cm to generate a constant gradient, 65 gauss/cm, in the direction of flow.Subsequently, a series of process methods, for MR measurements, were proposed to characterize Newtonian and non-Newtonian fluid flows in a pipe, including phasebased method, magnitude-based method, and velocity spectrum method. The accuracies of the proposed methods were validated by simulations, and experiments of Poiseuille flow and shear-thinning flow on the designed magnet. The new velocity profile methods proposed are advantageous because the MR instrumentation and measurement methods are simple and portable. The sophistication is found in the analysis although the physical principles are straight forward.

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Section: Song Et Al (2005) Employed the Multiple Modulation Multiple ...mentioning

confidence: 99%

Laminar flow characterization using low-field magnetic resonance techniques

et al. 2021

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“…Nuclear magnetic resonance (NMR) based flow metering has proven to be a viable tool for multiphase flow detection [1] with a range of industrial applications [1,2,3]. However, high-field NMR measuring devices are costly, show a high system integration effort and don't work with metallic pipes [4]. These aspects limit the methods applicability [5].…”

Section: Introductionmentioning

confidence: 99%

A6.1 - Magnetic Flow Metering with Optically Pumped Magnetometers (OPM)

Schmieder¹,

Koss²,

Kühnemann³

2023

Lectures

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We present a novel non-invasive flow metering procedure where the flow velocity of a fluid is determined using polarized hydrogen nuclei of the fluid as magnetic markers. The metering procedure is based on a time-of-flight method in which magnetic information is applied to the liquid using a permanent magnet and a radiofrequency (RF) pulse. Downstream, the magnetic information is read-out by optically pumped magnetometers (OPM) by measuring the magnetic field produced by the hydrogen. We discuss results, application cases and challenges for industrial usability.

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“…Accurate measurement of multiphase flow parameters is of great scales, which is dependent on the different gas-liquid mixed flow. A number of non-invasive instruments and techniques such as gamma-ray technique, x-ray technique, nuclear magnetic resonance technique, neutron activation analysis including absorption and scattering techniques [2,3] have already been developed to measure phase fraction. But they are restricted to truly homogeneous fluid while errors due to phase distribution, and much use outside research lab needs to be further developed.…”

Section: Introductionmentioning

confidence: 99%

Phase fraction measurement of oil–gas–water three-phase flow with stratified gas by ultrasound technique

Deng

Liu

et al. 2022

Meas. Sci. Technol.

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Phase fraction is one of important indexes to characterize multiphase flow. In order to measure each phase fraction of oil-gas-water three-phase flow, liquid level height is detected by Time of Flight – TOF of reflected ultrasound at gas-liquid interface, while oil phase fraction in reflection path is calculated according to the ultrasound attenuation. By studying interactions between multiphase flow and the ultrasound propagation in certain flow patterns, a prediction model for phase fraction measurement of three-phase flow is proposed based on ultrasound transmission attenuation and reflection TOF in the process of horizontal flow with actual phase distributions. Simulation and experimental results under conditions of oil-water two-phase structure with stratified gas in a horizontal pipe show that the proposed method and the established model can accurately detect gas-liquid interface, so that measure oil, gas, water phase fraction. The mechanism prediction model and the measurement device effectively solve the nonlinear response of the ultrasonic measurement parameter, so that can estimate phase fractions of liquids and gas in two-phase as well as three-phase flows simultaneously, which extends the measurement range and the applicable scope of ultrasonic technique to multiphase flow.

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Quantitative multiphase flow characterisation using an Earth's field NMR flow meter

Cited by 23 publications

References 42 publications

Laminar flow characterization using low-field magnetic resonance techniques

Laminar flow characterization using low-field magnetic resonance techniques

A6.1 - Magnetic Flow Metering with Optically Pumped Magnetometers (OPM)

Phase fraction measurement of oil–gas–water three-phase flow with stratified gas by ultrasound technique

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