Coherent Structures in Flat-Bed Abutment Flow: Computational Fluid Dynamics Simulations and Experiments
Publication: Journal of Hydraulic Engineering
Volume 129, Issue 3
Abstract
Numerical computations and laboratory experiments are carried out to investigate the three-dimensional structure of large-scale (coherent) vortices induced by bridge abutments on a flat bed. A finite-volume numerical method is developed for solving the unsteady, three-dimensional Reynolds-averaged Navier–Stokes equations, closed with the turbulence model, in generalized curvilinear coordinates and applied to study the flow in the vicinity of a typical abutment geometry with a fixed, flat bed. The computed flowfields reveal the presence of multiple, large-scale, unsteady vortices both in the upstream, “quiescent,” region of recirculating fluid and the shear-layer emanating from the edge of the foundation. These computational findings motivated the development of a novel experimental technique for visualizing the footprints of large-scale coherent structures at the free surface. The technique relies on digital photography and employs averaging of instantaneous images over finite-size windows to extract coherent eddies from the chaotic turbulent flow. Application of this technique to several abutment configurations yielded results that support the numerical findings.
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References
Baker, C. J.(1979). “The laminar horseshoe vortex.” J. Fluid Mech., 95(2), 347–367.
Baker, C. J.(1980a). “Theoretical approach to prediction of local scour around bridge piers.” J. Hydraul. Res., 18(1), 1–12.
Baker, C. J.(1980b). “The turbulent horseshoe vortex.” J. Wind. Eng. Ind. Aerodyn., 6, 9–23.
Baker, C. J.(1991). “The oscillation of horseshoe vortex systems.” J. Fluids Eng., 113, 489–495.
Dargahi, B.(1989). “The turbulent flow field around a circular cylinder.” Exp. Fluids, 8, 1–12.
Dargahi, B.(1990). “Controlling mechanism of local scour.” J. Hydraul. Eng., 116(10), 1197–1214.
Devenport, W. J., and Simpson, R. L.(1990). “A time-dependent and time-averaged turbulence structure near the nose of a wing-body junction.” J. Fluid Mech., 210, 23–55.
Guellouz, M. S., and Tavoularis, S.(2000). “The structure of turbulent flow in a rectangular channel containing a cylindrical rod. 2: Phase-averaged measurements.” Exp. Therm. Fluid Sci., 23, 75–91.
Jones, C. S. (1999). “Static mixers for water treatment: A computational fluid dynamics model.” PhD thesis, Georgia Institute of Technology, Ga.
Jones, C. S., Sotiropoulos, F., and Amirtharajah, A.(2002). “Numerical modelling of helical static mixers in water treatment.” J. Environ. Eng. (Reston, Va.), 128(5), 431–440.
Kwan, R. T. F., and Melville, B. W.(1994). “Local scour and flow measurements at bridge abutments.” J. Hydraul. Res., 32(5), 661–673.
Lin, F.-B., and Sotiropoulos, F.(1997a). “Strongly coupled multigrid method for three-dimensional incompressible flows using near-wall turbulence closures.” J. Fluids Eng., 119, 314–324.
Lin, F.-B., and Sotiropoulos, F.(1997b). “Assessment of artificial dissipation models for three-dimensional incompressible flows solution.” J. Fluids Eng., 119, 331–340.
Lucas, K. V. (1997). “Numerical investigation of three-dimensional vortex breakdown.” PhD thesis, Stanford Univ., Calif.
Melville, B. W.(1992). “Local scour at bridge abutments.” J. Hydraul. Eng., 118(4), 615–631.
Melville, B. W.(1997). “Pier and abutments scour: An integrated approach.” J. Hydraul. Eng., 123(2), 125–136.
Menter, F. R.(1996). “A comparison of some recent eddy-viscosity turbulence models.” J. Fluids Eng., 118, 514–519.
Merkle, C. L., and Athavale, M.(1987). “Time-accurate unsteady incompressible flow algorithms based on artificial compressibility.” AIAA Pap., 87, 397–407.
Meselhe, E. A., and Sotiropoulos, F.(2000). “Three-dimensional numerical model for open channels with free-surface variations.” J. Hydraul. Res., 35(2), 115–121.
Neary, V. S., Sotiropoulos, F., and Odgaard, A. J.(1999). “Three-dimensional numerical model of lateral-intake flows.” J. Hydraul. Eng., 125(2), 126–140.
Olsen, N. R. B., and Kjellesvig, H. M.(1998). “Three-dimensional numerical flow modelling for estimation of maximum local scour depth.” J. Hydraul. Res., 36(4), 579–590.
Parola, A. C., Hagerty, D. J., Mueller, D. S., Melville, B. W., Parker, G., and Usher, J. S. (1997). “The need for research on scour at bridges.” Proc., Water for a Changing Global Community, 27th Congress Int. Association for Hydraulic Research, San Francisco, 124–129.
Shirole, A. M., and Holt, R. C. (1991). “Planning for a comprehensive bridge safety assurance program.” Transportation Research Record, TRB National Research Council, 1290, 39–50.
Simpson, R. L.(1996). “Aspects of turbulent boundary layer separation.” Prog. Aerosp. Sci., 32, 457–521.
Sotiropoulos, F., and Ventikos, Y.(1998). “Flow through a curved duct using linear and nonlinear two-equation models.” AIAA J., 36(7), 1256–1262.
Sturm, T. W., and Chrisochoides, A. (1998). “Abutment Scour in Compound Channels for Variable Setbacks.” Proc., Stream Stability and Scour at Highway Bridges, ASCE, Reston, Va., 398.
Sturm, T. W. (1999). “Abutment scour studies for compound channels.” Federal Highway Administration, Rep. No. FHWA-RD-99-156, Turner-Fairbank Highway Research Center, McLean, Va.
Tang, H. (2001). “Numerical simulation of unsteady three dimensional incompressible flows in complex geometries.” PhD thesis, Georgia Institute of Technology, Ga.
Wilcox, D. C.(1988). “Reassessment of the scale determining equation for advanced turbulence models.” AIAA J., 26(11), 1299–1310.
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Copyright © 2003 American Society of Civil Engineers.
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Received: May 14, 2001
Accepted: Oct 21, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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