1 May 2018 Hydraulic Gradient Reduction Effects on Sand-Water Mixture Flows Caused by Electro-Magnetic Force Generation
Gil-Lim Yoon, Hong-Yeon Cho, Yoo-Seung Kim, Seung-Hee Kwon
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Yoon, G.-L.; Cho, H.-Y.; Kim Y.-S., and Kwon, S.-H., 2018. Hydraulic gradient reduction effects on sand-water mixture flows caused by electro-magnetic force generation. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 1141–1145. Coconut Creek (Florida), ISSN 0749-0208.

Large coastal development projects are frequently accompanied by reclamation and dredging works to create coastal land. In coastal reclamation projects, the construction materials and their transportation methods should be determined from an economic perspective because they constitute a large portion of the construction cost. Therefore, improvements to transportation efficiency are strongly expected to contribute to a substantial reduction in construction costs. In this study, an electro-magnetic force (EMF) generation method is proposed, and the quantitative effects of this method are analyzed via hydraulic model experiments with variable practical conditions. The experimental results show that a change in the typical flow type from bottom rolling to suspension contributes to a significant reduction in the bottom resistance and hydraulic gradient because of the lowered deposition height after EMF generation. The EMF effect was larger in fine soils than in coarser soils, and EMF generation reduced the hydraulic gradient by approximately 10%. Thus, EMF generation technology can be applied to reduce transportation costs, including of dredged materials, in many types of fluid flowing projects.

©Coastal Education and Research Foundation, Inc. 2018
Gil-Lim Yoon, Hong-Yeon Cho, Yoo-Seung Kim, and Seung-Hee Kwon "Hydraulic Gradient Reduction Effects on Sand-Water Mixture Flows Caused by Electro-Magnetic Force Generation," Journal of Coastal Research 85(sp1), 1141-1145, (1 May 2018). https://doi.org/10.2112/SI85-229.1
Received: 30 November 2017; Accepted: 10 February 2018; Published: 1 May 2018
dredged materials
elector-magnetic force
Hydraulic gradient
transport efficiency
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