Ocean Systems Engineering

  • 제2권4호
  • /
  • Pages.289-295
  • /
  • 2012
  • /
  • 2093-6702(pISSN)
  • /
  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Enhanced vertical diffusion coefficient at upper layer of suspended sediment concentration profile

  • Kim, Hyoseob (Civil and Environmental Engineering, Kookmin University) ;
  • Jang, Changhwan (Construction Technology Examination Division, Korean Intellectual Property Office) ;
  • Lhm, Namjae (Hyosung Ebara Engineering)
  • 투고 : 2012.09.27
  • 심사 : 2012.12.13
  • 발행 : 2012.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Assume fluid eddy viscosity in the vertical direction is parabolic. Sediment particles diffuse with the given fluid eddy viscosity. However, when the vertical diffusion coefficient profile is computed from the suspended sediment concentration profile, the coefficient shows lager values than the fluid mixing coefficient values. This trend was explained by using two sizes of sediment particles. When fine sediment particles like wash load are added in water column the sediment mixing coefficient looks much larger than the fluid mixing coefficient.

키워드

참고문헌

  1. Ashida, K. and Fujita, M. (1986), "Stochastic model for particle suspension in open channels", J. Hydrosci. Hydraul. Eng.- ISCE, 4, 21-46.
  2. Bagnold, R.A. (1966), An approach to the sediment transport problem from general physics, Geological Survey Professional Paper 422-I, Washington, USA.
  3. Bhattacharya, P.K. (1971), Sediment suspension in shoaling waves, Ph.D. thesis, University of Iowa, Iowa, USA.
  4. Bogardi, J.L. (1974), Sediment transport in alluvial streams, Akademiaci Kiado, Budapest, Hungary.
  5. Camenen, B. and Larson, M. (2007), A Unified Sediment Transport Formulation for Coastal Inlet Application, ERDC/CHL CR-07-1, Coastal and Hydraulics Laboratory, US Army Corps Engineers, Washington, D.C.,USA.
  6. Coleman, N.L. (1969), "A new examination of sediment suspension in open channels", J. Hydraul. Res., 19(3), 211-229.
  7. Coleman, N.L. (1970), "Flume studies of the sediment transfer coefficient", Water Resour. Res., 6(3), 801-809. https://doi.org/10.1029/WR006i003p00801
  8. Dey, S. and Papanicolaou, A. (2008), "Sediment threshold under stream flow: a state-of-the-art review", KSCE J. Civil Eng., 12(1), 45-60. https://doi.org/10.1007/s12205-008-8045-3
  9. Dyer, K.R. and Soulby, R.L. (1988), "Sand transport on the continental shelf", Annu. Rev. Fluid Mech., 20, 295-324. https://doi.org/10.1146/annurev.fl.20.010188.001455
  10. Lane, E.W., Carlson, E.J. and Hanson, O.S. (1949), "Low temperature increase in sediment transportation in Colorado River", Civil Eng., 19, 619-621.
  11. McLean, S.R. (1991), "Depth-integrated suspended load calculation", J. Hydraul. Eng. - ASCE, 117(11), 1440-1458. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:11(1440)
  12. Rouse, H. (1937), "Modern conceptions of the mechanics of fluid turbulence", Transactions - ASCE, 102, 463-543.
  13. van Rijn, L.C. (1984), "Sediment transport, Part II: suspended load transport", J. Hydraul. Eng. - ASCE, 110(11), 1613-1641. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:11(1613)
  14. van Rijn, L.C. (1987), Mathematical modelling of morphological processes in the case of suspended sediment transport, Ph.D. thesis, Delft University, The Netherlands.
  15. van Rijn, L.C. (1993), Principles of sediment transport in river, estuaries, and coastal seas, Aqua Publications, Netherlands.