Maniatis, G., Hoey, T. B. , Hassan, M. A., Sventek, J., Hodge, R., Drysdale, T. and Valyrakis, M. (2017) Calculating the explicit probability of entrainment based on inertial acceleration measurements. Journal of Hydraulic Engineering, 143(4), 04016097. (doi: 10.1061/(ASCE)HY.1943-7900.0001262)
|
Text
123104.pdf - Accepted Version 5MB |
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.
University Staff: Request a correction | Enlighten Editors: Update this record