Calculating the explicit probability of entrainment based on inertial acceleration measurements

Maniatis, G.; Hoey, T.B.; Hassan, M.A.; Sventek, J.; Hodge, R.A.; Drysdale, T.; Valyrakis, M.

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.

Citation

Maniatis, G., Hoey, T., Hassan, M., Sventek, J., Hodge, R., Drysdale, T., & Valyrakis, M. (2017). Calculating the explicit probability of entrainment based on inertial acceleration measurements. Journal of Hydraulic Engineering, 143(4), Article 04016097. https://doi.org/10.1061/%28asce%29hy.1943-7900.0001262

• Journal Article Type: Article
• Acceptance Date: Aug 18, 2016
• Online Publication Date: Nov 4, 2016
• Publication Date: Apr 1, 2017
• Deposit Date: Oct 11, 2016
• Publicly Available Date: Oct 12, 2016
• Journal: Journal of hydraulic engineering
• Print ISSN: 0733-9429
• Electronic ISSN: 1943-7900
• Publisher: American Society of Civil Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 143
• Issue: 4
• Article Number: 04016097
• DOI: https://doi.org/10.1061/%28asce%29hy.1943-7900.0001262
• Public URL: https://durham-repository.worktribe.com/output/1372990