Turbulence and coherent flow structures associated with bedform amalgamation: An experimental study of the ripple-dune transition

Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships

Volumn 104, Issue , 2004, Pages

  Lopez F ^a   Fernandez, R ^a   Best, J ^b  

^a UNIVERSIDAD NACIONAL DE CÓRDOBA   (Argentina)

^b UNIVERSITY OF LEEDS   (United Kingdom)

Author keywords

Bed ripples; Bedforms; Dunes; Fluid dynamics; Reynolds stress; Turbulence; Velocity

Indexed keywords

BED RIPPLES; BEDFORMS; DYNAMICAL EFFECTS; EXPERIMENTAL STUDIES; FOURTH-ORDER; JOINT MOMENT; LOCAL DEVIATION; LOCAL PRODUCTION; MEAN PRESSURES; MEAN VELOCITIES; REYNOLDS STRESS; SPATIAL GRIDS; TURBULENCE STATISTICS; TURBULENT FLUX; VELOCITY FLUCTUATIONS;

FLUID DYNAMICS; METALS; PETROLEUM RESERVOIR EVALUATION; PLANNING; REYNOLDS NUMBER; TURBULENCE; VELOCITY; WATER RESOURCES EXPLORATION;

WATER RESOURCES;

EID: 74949125545     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.1061/40517(2000)275     Document Type: Conference Paper

References (17)

1. Allen, J.R.L 1982 Sedimentary Structures: their character and physical basis, Elsevier, Amsterdam. 539pp.
2. Baas, J.H. (1993) Dimensional analysis of current ripples in recent and ancient depositional environments. PhD thesis. Department of Geology, University of Utrecht, 199pp.
3. Bennet, S.J. y Best, J.L. (1996) "Mean flow and turbulence strucutre over fixed ripples and the ripple-dune transition". Chap. 15 in Coherent flow structures in open channels. Ed. P.J.
4. Ashworth, S.J. Bennett, J.L. Best y S.J. McLelland. John Wiley & Sons Ltd, pp. 281-304.
5. Best, J.L. (1996) "The fluid dynamics of small-scale alluvial bedforms". Advances in fluvial Dynamics and Stratigraphy. Ed. P.A. Carling y M.R. Dawson. John Wiley & Sons Ltd. pp.67-125.
6. Costello, W.R. y Southard, J.B. (1980) "Flume experiments on lower-regime bed forms in coarse sand". Journal Sed. Petrol., 51(3), pp. 349-864.
7. García, M.H.; Niño, Y. y López F. (1995) "Observations of particle entrainment into suspension by turbulent bursting". Chap. 3 in Coherent flow structures in open channels. Ed. P.J. Ashworth, S.J. Bennett, J.L. Best y S.J. McLelland. John Wiley & Sons Ltd.
8. Jackson, R. (1976). "Sedimentological and Fluid-dynamic Implications of the Turbulent Bursting Phenomenon in Geophysical Flows". Journal Fluid Mech., Vol. 77.
9. Kadota, A. y Nezu, I. (1999) "Three-dimensional structure of space-time correlation on coherent vortices generated behind dune crest". Journal Hydraul. Research, IAHR, Vol 37, No 1, pp. 59-80.
10. Karahan, M.E. y Peterson, A.W. (1980) "Visualisation of separation over sand waves". Journal Hydraul. Division, ASCE, 106(HY8), pp. 345-1352.
11. Lu, S. y Willmarth, W. (1973). "Measurements of the strucutre of the Reynolds stress in a turbulent boundary layer". Journal Fluid Mech. Vol. 60, part 3, pp. 481-511.
12. Lyn, D.A. (1993) "Turbulence Measurements in Open-Channel Flows over Artificial Bed Forms". Journal Hydraul. Eng., 119(3), pp. 306-325.
13. Nelson, J.M., McLeanm S.R. y Wolfe, S.R. (1993) "Mean Flow and Turbulence Fields over Two-Dimensional Bed Forms". Water Res. Res., Vol. 29, No12, pp. 3935-3953.
14. Nezu, I., Nakagawa, H. (1989) "Turbulent Structure of Backward-Facing Step and Coherent Vortex Shedding from Reattachment in Open Channel Flows", Turbulent Shear Flows, Springer-Verlag, Vol.6, pp.313-337.
15. Nezu, I., Nakagawa, H. (1993) Turbulence in Open-Channel Flows. IAHR Monograph Series. A.A. Balkema, Rotterdam.
16. Wallace, J.; Eckelmann, H. y Brodkey, R. (1972). "The wall region in turbulent shear flow". Journal Fluid Mech. 54, pp. 39-48.
17. Yalin, M. (1977). "On the determination of ripple length". Journal Hydraul. Div., ASCE, Vol. 103, pp.439-442.