Direct Lorentz force compensation flowmeter for electrolytes

Vasilyan, Suren; Froehlich, Th.

doi:10.1063/1.4903235

Cited by 9 publications

(13 citation statements)

References 11 publications

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“…This will allow for a higher resolution of the forces that are being detected. Vasilyan and Froehlich [27] discussed the Lorentz force detection system to balance with the so-called Electromagnetic Force Compensation (EMFC), allowing much more improved force resolution. Lorentz force is induced in the turbulent flow of saline water inside a glass duct with the interaction of the transverse magnetic field.…”

Section: Lorentz Forcementioning

confidence: 99%

See 1 more Smart Citation

A Review on Non-Invasive Magnetic and Electric Field Excited Methods for Flow Characterisation of Incompressible Newtonian Low Conductive Liquids

Vadde

Kadambi

Channabasappa

2023

ARFMTS

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Monitoring the flow rate of low conductive fluid is critical in sectors such as waste, culinary, chemical, pharmaceutical, oil and gas, and power. The flow meter can be used to measure several parameters like flow rate range, fluid electrical conductivity, cost and the scenario of desired monitoring. The existing invasive flow sensors for monitoring the velocity of conductive fluid are often associated with undesirable attributes of being obstructive, prone to interference effects, corrosion, significant pressure reduction, and energy loss in pipe systems causing severe and long-term damage to pipes during installation. This paper presents a comprehensive survey of various non-invasive methods for characterizing low conductive fluid flow based on the sources of strong magnetic and electric fields. This review discusses fundamental insights for understanding the physical phenomenon in the generation of eddy currents, Lorentz force, and the formation of the electric double layer with pertinent illustrations and discussions. The review presented in this paper concludes that each non-invasive measurement technique has limitations based on the excitation source of either magnetic or electric fields. Different values of low conductivity of fluid flow and flow velocity have been considered in various studies to get an in-depth understanding of the capability of selected techniques so that their scope and versatility can be researched further. This paper also highlights that emerging technologies like cryostats with superconducting magnet systems, which unquestionably exceed the mass limitation, have become viable in applications such as Lorentz force velocimetry.

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Section: Lorentz Forcementioning

confidence: 99%

“…10. Electromagnetic force compensation system [27] Magnet will have a deflection due to the Lorentz force acting on it. An optoelectronic position sensor has been used to measure the position of magnet system, as shown in Figure 10.…”

Section: Lorentz Forcementioning

confidence: 99%

A Review on Non-Invasive Magnetic and Electric Field Excited Methods for Flow Characterisation of Incompressible Newtonian Low Conductive Liquids

Vadde

Kadambi

Channabasappa

2023

ARFMTS

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“…This scaling (2) is valid for the quasistatic approximation of magnetohydrodynamics [1], where the retroactive effect of the induced magnetic field on the eddy currents can be neglected. The linear dependence of the force on the velocity field v has been successfully used, among others, in liquid metal duct flows [18], for electrolytes with weak electrical conductivity [19][20][21] and for the flow in a rotating tank with significant velocity changes [22]. In the latter two examples the LFV method has been pushed to the limits of applicability, i.e.…”

Section: Introductionmentioning

confidence: 99%

Local Lorentz force and ultrasound Doppler velocimetry in a vertical convection liquid metal flow

et al. 2017

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We report velocity measurements in a vertical turbulent convection flow cell that is filled with the eutectic liquid metal alloy gallium-indium-tin by the use of local Lorentz force velocimetry (LLFV) and ultrasound Doppler velocimetry (UDV). We demonstrate the applicability of LLFV for a thermal convection flow and reproduce a linear dependence of the measured force in the range of micronewtons on the local flow velocity magnitude. Furthermore, the presented experiment is used to explore scaling laws of the global turbulent transport of heat and momentum in this low-Prandtl-number convection flow. Our results are found to be consistent with theoretical predictions and recent direct numerical simulations.

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“…Over the last decade, a number of reports have been dedicated to the development of various contactless flowmeters [1][2][3][4][5][6][7][8][9][10][11][12][13] based on the Lorentz force velocimetry (LFV) technique. The necessity of this kind of contactless flowmeters is crucial when the liquid is not directly accessible for conventional methods such as magneto-inductive flowmeters, ultrasound flowmeters, and optical flowmeters.…”

Section: Introductionmentioning

confidence: 99%

“…The main interest of this work is to extend the feasibility of the LFV technique to the flow rate measurements of salt water with low electrical conductivity. Based on the results previously reported in [10][11][12][13], improvements of the experimental facility and the force measurement setup were implemented in order to enable flow rate measurements of salt water with an electrical conductivity below 2 S•m −1 . This paper is organized as follows: first, the flow measurement facility and its working principle are introduced, and details of the salt water loop characteristics and magnet systems are presented.…”

Section: Introductionmentioning

confidence: 99%

Towards metering tap water by Lorentz force velocimetry

Vasilyan

Ebert

Weidner

et al. 2015

Meas. Sci. Technol.

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In this paper, we present enhanced flow rate measurement by applying the contactless Lorentz Force Velocimetry (LFV) technique. Particularly, we show that the LFV is a feasible technique for metering the flow rate of salt water in a rectangular channel. The measurements of the Lorentz forces as a function of the flow rate are presented for different electrical conductivities of the salt water. The smallest value of conductivity is achieved at 0.06 S•m −1 , which corresponds to the typical value of tap water. In comparison with previous results, the performance of LFV is improved by approximately 2 orders of magnitude by means of a high-precision differential force measurement setup. Furthermore, the sensitivity curve and the calibration factor of the flowmeter are provided based on extensive measurements for the flow velocities ranging from 0.2 to 2.5 m•s −1 and conductivities ranging from 0.06 to 10 S•m −1 .

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Direct Lorentz force compensation flowmeter for electrolytes

Cited by 9 publications

References 11 publications

A Review on Non-Invasive Magnetic and Electric Field Excited Methods for Flow Characterisation of Incompressible Newtonian Low Conductive Liquids

A Review on Non-Invasive Magnetic and Electric Field Excited Methods for Flow Characterisation of Incompressible Newtonian Low Conductive Liquids

Local Lorentz force and ultrasound Doppler velocimetry in a vertical convection liquid metal flow

Towards metering tap water by Lorentz force velocimetry

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