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TECHNICAL PAPERS

Fluid Dynamic Loading on Curved Riser Pipes

[+] Author and Article Information
Anthi Miliou, Spencer J. Sherwin, J. Michael R. Graham

Department of Aeronautics, Imperial College London, South Kensington Campus, London SW7 2BY, U.K.

J. Offshore Mech. Arct. Eng 125(3), 176-182 (Jul 11, 2003) (7 pages) doi:10.1115/1.1576817 History: Received July 01, 2001; Revised May 01, 2002; Online July 11, 2003
Copyright © 2003 by ASME
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References

Vandiver, J. K., and Li, L., 1994, SHEAR7 Program Theoretical Manual., Department of Ocean Engineering, MIT, Cambridge, MA, U.S.A.
Karniadakis, G. E., and Sherwin, S. J., 1999, Spectral/hp Element Methods for CFD, Oxford University Press.
Karniadakis,  G. E., Israeli,  M., and Orszag,  S. A., 1991, “High-order Splitting Methods for the Incompressible Navier-Stokes Equations,” J. Comput. Phys., 97, pp. 414–443.
Sherwin,  S. J., and Karniadakis,  G. E., 1996, “Tetrahedral hp Finite Elements: Algorithms and Flow Solutions,” Journal of Computational Physics, 124, pp. 14–45.
Peiro, J., and Sayma, A. I., 1995, “A 3-D Unstructured Multigrid Navier-Stokes Solver,” K. W. Morton and M. J. Baines, eds., Numerical Methods for Fluid Dynamics, V, Oxford University Press.
Peraire,  J., Peiro,  J., and Morgan,  K., 1993, “Multigrid Solution of the 3-D Compressible Euler Equations on Unstructured Tetrahedral Grids,” Int. J. Numer. Methods Eng., 36, pp. 1029–1044.
Graham, J. M. R., 1993, “Comparing Computation of Flow Past Circular Cylinders with Experimental Data,” Bluff Body Wakes, Dynamics and Instabilities, Springer Verlag, Berlin, pp. 317–324.
Bearman,  P. W., 1998, “Developments in the Understanding of Bluff Body Flows,” JSME Int. J., Ser. B, 41 .
Jeong,  J., and Hussain,  F., 1995, “On the Identification of a Vortex,” J. Fluid Mech., 285, pp. 69–94.
Owen, J. C., 2001, “Passive Control of Vortex Shedding in the Wake of Bluff Bodies,” Ph.D. thesis, University of London.

Figures

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Vortex cores in the wake of a curved riser in contact with an inviscid wall. Shear normal flow, Red=100,λ2=−0.1
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Curved riser in contact with an inviscid wall. Uniform flow normal to the plane of curvature, Red=100
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Vortex cores in the wake of a curved riser in contact with an inviscid wall. Uniform normal flow, Red=100,λ2=−0.1
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Quarter turn with an in-line extension in uniform flow parallel to the plane of curvature, Red=100
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Force history with interpolating polynomials of order 4 and 6
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Vortex cores in the wake of a quarter turn with an in-line extension in uniform parallel flow, Red=100,λ2=−0.1
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Projection of the vortex cores in the xy-plane
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Flow visualization for a quarter turn with an in-line extension in uniform flow parallel to the plane of curvature, Red=100
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Curved riser in contact with an inviscid wall. Shear flow normal to the plane of curvature, Red=100
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Vortex cores in the wake of a curved riser in contact with the seabed. Shear normal flow, Red=100,λ2=−0.1  
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Curved riser in contact with the seabed. Shear flow normal to the plane of curvature, Red=100
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Pressure contours for a quarter turn in uniform normal flow, Red=100;p=−0.30ρu2 and p=−0.40ρu2
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Pressure isocontours for a quarter turn in uniform normal flow, Red=100; (a) p=−0.30ρu2,Cp=−0.82; (b) p=−0.40ρu2,Cp=−1.02, projection in the xy-plane
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Power spectra density for (a) Fx; (b) Fy; (c) Fz
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Quarter turn in uniform flow normal to the plane of curvature, Red=100
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Computational boundaries (not to scale)

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