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http://dx.doi.org/10.12652/Ksce.2016.36.5.0819

Characteristics of Surface and Internal Wave Propagation through Density Stratification  

Lee, Woo-Dong (Gyeongsang National University)
Hur, Dong-Soo (Gyeongsang National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.36, no.5, 2016 , pp. 819-830 More about this Journal
Abstract
Hydrodynamic characteristics of wave propagation through density stratification have not been identified in details. So this study conducted a numerical simulation using LES-WASS-3D ver. 2.0 for analysis of density current due to water temperature and salinity in order to analyze hydraulic characteristics under wave action in a two-layer density stratified fluid. For the validity and effectiveness of numerical wave tank used, it was compared and analyzed with the experiment to show waveform based on $3^{rd}$-order Stoke wave theory at the internal of a density stratification. Using the results obtained from numerical simulation, the surface and internal wave heights are reduced as the wave propagates in a two-layer density stratified water. And the surface or internal wave attenuation became more serious as the vorticities were increased by the velocity difference of wave propagation due to the upper-lower density difference around the interface of a density stratification. As well, the surface and internal wave attenuations became more serious with higher density difference and depth ratio between upper and lower layers when the wave propagates through a density stratification.
Keywords
Density stratification; Surface wave; Internal wave; Vorticity; Wave attenuation; LES-WASS-3D ver. 2.0;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Lee, W. D. and Hur, D. S. (2014). "Development of 3-d hydrodynamical model for understanding numerical analysis of density current due to salinity and temperature and its verification." J. Korean Society of Civil Eng., KSCE, Vol. 34, No. 3, pp. 859-871 (in Korean).   DOI
2 Lilly, D. K. (1991). "A proposed modification of the Germano subgrid-scale closure method." Phy. Fluids, Vol. 4, pp. 633-635.
3 Michallet, H. and Barthelemy, E. (2008). "Experimental study of interfacial solitary waves." J. Fluid Mech., Vol. 366, pp. 159-177.
4 Nakayama, K. and Imberger, J. (2010) "Residual circulation due to internal waves shoaling on a slope." Limnol. Oceanogr., Vol. 55, No. 3, pp. 1009-1023.   DOI
5 Ohyama, T. and Nadaoka, K. (1991). "Development of a numerical wave tank for analysis of non-linear and irregular wave field." Fluid Dyn. Res., Vol. 8, pp. 231-251.   DOI
6 Raffel, M., Willert, C. E. and Kompenhans, J. (1998). "Particle image velocimetry: a practical guide." Springer Verlag, Berlin, p. 253.
7 Raffel, M., Willert, C. E., Wereley, S. T. and Kompenhans, J. (2007). "Particle image velocimetry." Springer Verlag, Berlin, p. 448.
8 Umeyama, M. (2008a). "Mechanics of internal waves propagating over a varying bottom slope." J. Water Resources and Environmental Eng., No. 23, pp. 1-11.
9 Umeyama, M. (2008b). "PIV techniques for velocity fields of internal waves over a slowly varying bottom topography." J. Waterway, Port, Coastal, Ocean Eng., Vol. 134, pp. 286-298.   DOI
10 Umeyama, M. and Matsuki, S. (2011). "Measurements of velocity and trajectory of water particle for internal waves in two density layers." Geophysical Research Letters, Vol. 38, L03612, doi:10.1029/2010GL046419.   DOI
11 Umeyama, M. and Shinimiya, H. (2009). "Particle image velocimetry measurements for Stokes progressive internal waves." Geophysical Research Letters, Vol. 36, L06603, doi:10.1029/2008GL036821.   DOI
12 Riley, J. P. and Skirrow, G. (1965). "Chemical oceanography." Vol. 3, Academic Press.
13 Constantin, A. and Villari, G. (2008). "Particle trajectories in linear water waves." J. Math. Fluid Mech., Vol. 244, pp. 1888-1909.
14 Brackbill, J. U., Kothe, D. B. and Zemach, C. (1992). "A continuum model for modeling surface tension." J. Comp. Phys., Vol. 100, pp. 335-354.   DOI
15 Brorsen, M. and Larsen, J. (1987). "Source generation of nonlinear gravity waves with boundary integral equation method." Coastal Eng., Vol. 11, pp. 93-113.   DOI
16 Choi, W. and Camassa, R. (1999). "Fully nonlinear internal waves in a two-fluid system." J. Fluid Mech., Vol. 396, pp. 1-36.   DOI
17 Gill, A. E. (1982). "Atmosphere-ocean dynamics." New York, Academic Press.
18 Craig, W., Guyenne, P. and Sulem, C. (2011). "Coupling between internal and surface waves." Natural Hazards, Vol. 57, pp. 617-642.   DOI
19 Dias, F. and Il'ichev, A. (2001). "Interfacial waves with free-surface boundary conditions: an approach via a model equation." Physica D: Nonlinear Phenomena, Vol. 150, pp. 278-300.   DOI
20 Germano, M., Piomelli, U., Moin, P. and Cabot, W. H. (1991). "A dynamic subgrid-scale eddy viscosity model." Physics of Fluids, Vol. 3, pp. 1760-1765.   DOI
21 Grue, J., Jensen, A., Rusas, P. O. and Sveen, J. K. (2000). "Breaking and broadening of internal solitary waves." J. Fluid Mech., Vol. 413, pp. 181-217.   DOI
22 Hur, D. S. and Lee, W. D. (2012). "Three-dimensional flow characteristics and wave height distribution around permeable submerged breakwaters; part I- without beach." J. Korean Society of Civil Eng., KSCE, Vol. 27, No. 6B, pp. 689-701 (in Korean).
23 Hur, D. S., Lee, W. D. and Cho, W. C. (2012). "Three-dimensional flow characteristics around permeable submerged breakwaters with open inlet." Ocean Eng., Vol. 44, pp. 100-116.   DOI
24 Koo, W. C. and Kim, M. G. (2009). "Numerical analysis of internal waves in two-layer fluids by a two-domain boundary element method." J. ocean eng. and tech., KSOE, Vol. 23, No. 4, pp. 6-11 (In Korean).
25 Kumar, P. S., Oh, Y. M. and Cho, W. C. (2008). "Surface and internal waves scattering by partial barriers in a two-layer fluid." J. Korean Society of Coastal and Ocean Eng., KSCOE, Vol. 20, No. 1, pp. 25-33.
26 Lai, K. C. (2009). "Experimental study on the interaction between surface wave and internal wave." Master`s thesis, Nat'l Sun Yat-sen Univ., Taiwan, p. 112 (In Chinese).