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© Siemens AG 2014 All rights reserved.siemens.com/answers A review of the theory of Coriolis flowmeter measurement errors due to entrained particles 10th European Fluid Mechanics Conference
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September 2014 © Siemens AG 2014 All rights reserved. Page 2Nils T. Basse / Siemens A/S, Flow Instruments Outline 1.Background 2.Bubble theory 3.Measurements and model 4.Outlook SITRANS FC410
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September 2014 © Siemens AG 2014 All rights reserved. Page 3Nils T. Basse / Siemens A/S, Flow Instruments Background Sometimes flow through flowmeters will consist of mixtures, e.g. water mixed with air bubbles, oil or sand Mixtures will cause (i) measurement errors and (ii) damping
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September 2014 © Siemens AG 2014 All rights reserved. Page 4Nils T. Basse / Siemens A/S, Flow Instruments Bubble theory
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September 2014 © Siemens AG 2014 All rights reserved. Page 5Nils T. Basse / Siemens A/S, Flow Instruments Measurements and model Bubble theory (phase decoupling): Negative error Compressibility: Positive error
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September 2014 © Siemens AG 2014 All rights reserved. Page 6Nils T. Basse / Siemens A/S, Flow Instruments Outlook Add important effects not included: Pressure loss Pipe geometry Flow pattern Interplay between above-mentioned effects J.Weisman, in Handbook of Fluids in Motion, pp. 409-425, 1983
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September 2014 © Siemens AG 2014 All rights reserved. Page 7Nils T. Basse / Siemens A/S, Flow Instruments Thank you for your attention! Nils T. Basse Senior Research Engineer Siemens A/S, Flow Instruments Nordborgvej 81 6430 Nordborg Phone: +45 7488 2610 E-mail: nils.basse@siemens.com nils.basse@siemens.com siemens.com/answers
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