AN OPEN BOUNDARY CONDITION FOR APPLICATION IN NUMERICAL COASTAL MODELS

Peifeng Ma; Ole Secher Madsen

doi:10.9753/icce.v32.currents.30

No. 32 (2010), Swash, Nearshore Currents, and Long Waves

No. 32 (2010)

AN OPEN BOUNDARY CONDITION FOR APPLICATION IN NUMERICAL COASTAL MODELS

Swash, Nearshore Currents, and Long Waves

Published 2011-01-29

Peifeng Ma⁺⁻
Ole Secher Madsen⁺⁻

Peifeng Ma

Singapore-MIT Alliance for Research and Technology

Ole Secher Madsen

Massachusetts Institute of Technology

Proceedings of the 32nd International Conference

PDF

Keywords

open boundary condition
bottom friction
phase speed
decay time
swing door boundary condition
numerical coastal model

How to Cite

AN OPEN BOUNDARY CONDITION FOR APPLICATION IN NUMERICAL COASTAL MODELS. (2011). Coastal Engineering Proceedings, 1(32), currents.30. https://doi.org/10.9753/icce.v32.currents.30

Abstract

Open boundaries (OBs) are usually unavoidable in numerical coastal circulation simulations. At OBs, appropriate open boundary conditions (OBCs) are required and a good OBC should be able to let outgoing waves freely pass to the exterior of a computational domain without creating reflections at the OBs. In the present study, a methodology has been developed to predict two parameters, phase speed c_r and decay time T_f, in a standard OBC formulation, so that the OBC is significantly improved compared to commonly used existing OBCs with specified c_r and T_f. For the conditions where wave period is unknown, the OBC with approximated c_r and T_f may be applied and a test reveals that this OBC is able to yield good results in typical coastal flow conditions. In addition, a Swing-Door Boundary Condition (SDBC) is proposed and tested for application at an offshore open boundary where both incoming and outgoing waves exist.

PDF

References

Blumberg A. F. and Kantha L. H. 1985. Open Boundary condition for circulation models, J. Hydraul. Eng., Vol. 111, No. 2, 237-255. http://dx.doi.org/10.1061/(ASCE)0733-9429(1985)111:2(237)

Chapman D. C. 1985. Numerical treatment of cross-shelf boundaries in a barotropic coastal ocean model, J. Phys. Oceanogr., Vol. 15, 1060-1075.http://dx.doi.org/10.1175/1520-0485(1985)015<1060:NTOCSO>2.0.CO;2

Chen, C., Beardsley, R. C., and Cowles, G. 2006. An unstructured grid, finite-volume coastal ocean model, FVCOM User Manual, Second Edition.

Grant, W. D. and Madsen, O. S. 1979. Combined wave and current interaction with a rough bottom, J.

Geophys. Res., Vol. 84(C4), 1979-1808.

Madsen, O. S., 2002. Sediment Transport Outside the Surf Zone. Chapter III.6 in Coastal Engineering

Manual, Part III Coastal Processes. (T. Walton, ed.), Engineer Manual 1110-2-1100, U.S. Army Corps of Engineers, Washington, DC.

Orlanski, I. 1976. A simple boundary condition for unbounded hyperbolic flows, J. Comput. Phys., Vol. 21, 251-269.http://dx.doi.org/10.1016/0021-9991(76)90023-1

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

Most read articles by the same author(s)

Ole Secher Madsen, WAVES GENERATED BY A PISTON-TYPE WAVEMAKER , Coastal Engineering Proceedings: No. 12 (1970): Proceedings of 12th Conference on Coastal Engineering, Washington, D.C., 1970.
Ole Secher Madsen, Ying-Keung Poon, Hans C. Graber, SPECTRAL WAVE ATTENUATION BY BOTTOM FRICTION: THEORY , Coastal Engineering Proceedings: No. 21 (1988): Proceedings of 21st Conference on Coastal Engineering, Torremolinos, Spain, 1988.
Ole Secher Madsen, SPECTRAL WAVE-CURRENT BOTTOM BOUNDARY LAYER FLOWS , Coastal Engineering Proceedings: No. 24 (1994): Proceedings of 24th Conference on Coastal Engineering, Kobe, Japan, 1994.
Ole Secher Madsen, William D. Grant, QUANTITATIVE DESCRIPTION OF SEDIMENT TRANSPORT BY WAVES , Coastal Engineering Proceedings: No. 15 (1976): Proceedings of 15th Conference on Coastal Engineering, Honolulu, Hawaii, 1976.
Peifeng Ma, Ole Secher Madsen, A 3D SEDIMENT TRANSPORT MODEL FOR COMBINED WAVE-CURRENT FLOWS , Coastal Engineering Proceedings: No. 33 (2012): Proceedings of 33rd Conference on Coastal Engineering, Santander, Spain, 2012
Chelsea Joy Humbyrd, Ole Secher Madsen, PREDICTING MOVABLE BED ROUGHNESS IN COASTAL WATERS , Coastal Engineering Proceedings: No. 32 (2010): Proceedings of 32nd Conference on Coastal Engineering, Shanghai, China, 2010.
Ole Secher Madsen, STABILITY OF A SAND BED UNDER BREAKING WAVES , Coastal Engineering Proceedings: No. 14 (1974): Proceedings of 14th Conference on Coastal Engineering, Copenhagen, Denmark, 1974.
Kian Yew Lim, Ole Secher Madsen, Hin Fatt Cheong, CURRENT CHARACTERISTICS IN THE PRESENCE OF NEAR-ORTHOGONAL WAVES , Coastal Engineering Proceedings: No. 33 (2012): Proceedings of 33rd Conference on Coastal Engineering, Santander, Spain, 2012
David Gonzalez-Rodriguez, Ole Secher Madsen, PREDICTION OF NET BEDLOAD TRANSPORT RATES OBTAINED IN OSCILLATING WATER TUNNELS AND APPLICABILITY TO REAL SURF ZONE WAVES , Coastal Engineering Proceedings: No. 32 (2010): Proceedings of 32nd Conference on Coastal Engineering, Shanghai, China, 2010.
Ole Secher Madsen, Stanley M. White, WAVE TRANSMISSION THROUGH. TRAPEZOIDAL BREAKWATERS , Coastal Engineering Proceedings: No. 15 (1976): Proceedings of 15th Conference on Coastal Engineering, Honolulu, Hawaii, 1976.

1 2 > >>

AN OPEN BOUNDARY CONDITION FOR APPLICATION IN NUMERICAL COASTAL MODELS

Keywords

How to Cite

Download Citation

Abstract

References

Most read articles by the same author(s)