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http://dx.doi.org/10.9765/KSCOE.2016.28.5.257

Estimation of Entrainment Rate of Fluid Mud using Annular Flume  

Kim, Dong-Ho (Dept. of Civil Eng. & Research Institute for Disaster Prevention, Chonbuk National Univ.)
Kim, Won-Kyu (Dept. of Civil Eng., Chonbuk National Univ.)
Hwang, Kyu-Nam (Dept. of Civil Eng. & Research Institute for Disaster Prevention, Chonbuk National Univ.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.28, no.5, 2016 , pp. 257-264 More about this Journal
Abstract
In this study, experiments for measurements of entrainment rate of fluid mud were carried out using annular flume domestically for the first time. Six entrainment tests using kaolinite sediments were conducted with different initial concentrations of fluid mud. It is shown that sediment settling counteracts the otherwise buoyancy dependent entrainment of fluid mud, and that the settling effect leads to a measurably decreased entrainment rate at higher Richardson numbers in comparison with entrainment of salt water, due to additional dissipation of turbulent kinetic energy in the interfacial layer. Through the comparison with previous other studies, the overall performance of the annular flume, the experimental procedure and the test results in simulating the entrainment of fluid mud are shown to be good enough to verify.
Keywords
entrainment rate; fluid mud; kaolinite; Richardson number; annular flume;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Kim, W.G. (2011). A study on estimation of entrainment rate of fluid mud. Master's Thesis, Chonbuk National University (in Korean).
2 Lofquist, K. (1960). Flow and stress near an interface between stratified liquids. Physics of Fluids, 3, 158-157.   DOI
3 Mehta, A.J. and Srinivas, R. (1993). Observations on the entrainment of fluid-mud by shear flow. In: Mehta A.J. (Ed.), Nearshore and Estuarine Cohesive Sediment Transport, Coastal and Estuarine Studies 42. Washington, DC: AGU, 224-246.
4 Mehta, A.J. (2014). An introduction to hydraulics of fine sediment transport. World Scientific.
5 Moore, M.J. and Long, R.R. (1971). An experimental investigation of turbulent stratified shearing flow. Journal of Fluid Mechanics, 49, 635-655.   DOI
6 Narimousa, S., Long, R.R. and Kitaigorodskii, S.A. (1986). Entrainment due to turbulent shear flow at the interface of a stably stratified fluid. Tellus, 38(A), 76-87.   DOI
7 Narimousa, S. and Fernando, H.J.S. (1987). On the sheared density interface of an entraining fluid. Journal of Fluid Mechanics, 174, 1-22.   DOI
8 Nguyen, D.P., Jung, E.T., Park, K.C. and Hwang, K.-N. (2012). A laboratory study on rheological properties of fluid mud. Journal of the Korea Society of Ocean Engineers, 24(3), 203-209 (in Korean).   DOI
9 Odd, N.V.M. and Cooper, A.J. (1989). A two-dimensional model of the movement of fluid mud in a high energy turbid estuary. Journal of Coastal Research, 5, 175-184.
10 Ross, M.A. Lin, C.P. and Mehta, A.J. (1987). On the definition of fluid mud. Proceedings of the National Conference on Hydraulic Engineering, ASCE, New York, 231-236.
11 Winterwerp, J.C. and Kranenburg, C. (1997). Erosion of fluid mud layers. II: Experiments and model validation. Journal of Hydraulic Engineering, 123(6), 512-519.   DOI
12 Zilitinkevich, S.S. (1975). A model for the dynamics of the inversion above a convective boundary layer. Journal of the Atmospheric Sciences, 32, 991-992.   DOI
13 Kato, H. and Phillips, O.M. (1969). On the penetration of a turbulent layer into a stratified fluid. Journal of Fluid Mechanics, 37, 643-655.   DOI
14 Elison, T.H. and Turner, J.S. (1959). Turbulent entrainment in stratified flows. Journal of Fluid Mechanics, 6, 423-448.   DOI
15 Hamm, L. and Mignoit, C. (1993). Elements of cohesive sediment deposition, consolidation and erosion, Coastal, Estuarial and Harbour Engineer's Reference Book. In: Abbott, M.B. and Price, W.A. (eds.), E & FN Spon, London, 93-106.
16 Hwang, K.-N., So, S.D. and Kim, T.M. (2005). An experimental study for estimation of erosion rate of fine cohesive sediments. Journal of Korea Society of Coastal and Ocean Engineers, 17(2), 117-128 (in Korean).