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Durham University

Department of Geography

Departmental Research Projects

Publication details

Maniatis, G., Hoey, T.B., Hassan, M.A., Sventek, J., Hodge, R.A., Drysdale, T. & Valyrakis, M. Calculating the explicit probability of entrainment based on inertial acceleration measurements. Journal of Hydraulic Engineering. 2017;143:04016097.

Author(s) from Durham

Abstract

A new method for the approximation of the explicit probability of entrainment for individual coarse particles is presented. The method is based on the derivation of inertial acceleration measurements, space-state approximation of the dynamics close to entrainment, and the probabilistic approximation of the threshold inertial acceleration that causes incipient motion. Results from flume experiments with a custom-made inertial measurement unit enclosed in an idealized spherical enclosure, under varied flow conditions (achieved through slope change) and two different arrangements (saddle and grain-top positions) are presented to demonstrate the application of the method. The analysis supports the modification of the existing flow velocity–based entrainment criteria so they respect the particle-frame realization of forces during incipient motion.

Department of Geography