Synthesis of a simulation model for an electromagnetic flowmeter

Vel't, I. D.; Mikhaǐlova, Yu. V.

doi:10.1007/s11018-006-0133-5

Cited by 2 publications

(2 citation statements)

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“…Among these, POTOK ͑devel-oped by Velt and Mikhailova͒, which uses a magnetic field converter ͑MFC͒ in the form of an induction coil constructed in accordance with the surface weighting function, enables one to simulate instruments of different construction and for different hydrodynamic regimes and flow structures. 10,11 The device is applicable for dry calibrating EMFs with channel diameters from small values ͑order of several millimeters͒ to indefinitely large values ͑up to 2000 mm or more͒. 11 However, POTOK requires additional comparison tests ͑between dry calibration and flow-rig calibration͒ to obtain a correct factor for each MFC.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 The device is applicable for dry calibrating EMFs with channel diameters from small values ͑order of several millimeters͒ to indefinitely large values ͑up to 2000 mm or more͒. 11 However, POTOK requires additional comparison tests ͑between dry calibration and flow-rig calibration͒ to obtain a correct factor for each MFC. Typically, POTOK has a calibration error after correction of about 0.5% as compared against experimental data on a flow-rig setup.…”

Section: Introductionmentioning

confidence: 99%

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Dry calibration of electromagnetic flowmeters based on numerical models combining multiple physical phenomena (multiphysics)

Lee

et al. 2010

Journal of Applied Physics

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This paper presents a method for dry calibration of an electromagnetic flowmeter (EMF). This method, which determines the voltage induced in the EMF as conductive liquid flows through a magnetic field, numerically solves a coupled set of multiphysical equations with measured boundary conditions for the magnetic, electric, and flow fields in the measuring pipe of the flowmeter. Specifically, this paper details the formulation of dry calibration and an efficient algorithm (that adaptively minimizes the number of measurements and requires only the normal component of the magnetic flux density as boundary conditions on the pipe surface to reconstruct the magnetic field involved) for computing the sensitivity of EMF. Along with an in-depth discussion on factors that could significantly affect the final precision of a dry calibrated EMF, the effects of flow disturbance on measuring errors have been experimentally studied by installing a baffle at the inflow port of the EMF. Results of the dry calibration on an actual EMF were compared against flow-rig calibration; excellent agreements (within 0.3%) between dry calibration and flow-rig tests verify the multiphysical computation of the fields and the robustness of the method. As requiring no actual flow, the dry calibration is particularly useful for calibrating large-diameter EMFs where conventional flow-rig methods are often costly and difficult to implement.

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Section: Introductionmentioning

confidence: 99%