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Constraining the functional form of the critical flow velocity at low concentrations in multiphase pipe flow

DOI: 10.1615/ICHMT.2015.THMT-15.1150
pages 539-542

H. P. Rice
School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom

Michael Fairweather
School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK

J. Peakall
School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK

T. N. Hunter
School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom

B. Mahmoud
School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom

Simon R. Biggs
School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom

Résumé

The critical deposition velocity delineates depositing and non-depositing solid-liquid multiphase flows. A three-parameter functional form for this important flow property is proposed that includes a dependence on the material properties and concentration of the solid-phase particles and explicitly captures the observed behaviour at low volume fractions. A novel method for measuring the critical deposition velocity is described, and the resulting expressions for the critical deposition velocity are combined with, and compare well to, data from the literature.

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