Bottom Dissipation in Finite-Depth Water Waves

Author(s):  
S. V. Hsiao ◽  
O. H. Shemdin
Keyword(s):  
2001 ◽  
Vol 71 (12) ◽  
pp. 827-840 ◽  
Author(s):  
Ch. Midya ◽  
M. Kanoria ◽  
B. N. Mandal

A submerged sphere advancing in a regular finite depth water wave at constant forward speed is analysed by linearized velocity potential. The solution is ob­tained by the multipole expansion extended from that developed for zero speed. Numerical results are obtained for wave-making resistance and lift, added masses, damping coefficients and exciting forces. Far field equations are also derived for calculating damping coefficients and exciting forces. They are used to check the results obtained from integrating pressure over the body surface. Excellent agree­ment is found.


2017 ◽  
Vol 68 ◽  
pp. 154-170 ◽  
Author(s):  
Erin E. Bachynski ◽  
Trygve Kristiansen ◽  
Maxime Thys

1984 ◽  
Vol 1 (19) ◽  
pp. 26 ◽  
Author(s):  
Charles L. Vincent

Bouws et al. (1983, 1984) have shown that wind sea spectra in finite depth water can be described by a self-similar spectral equation that in the deep water limit is the JONSWAP spectrum (Hasselmann et al. 1973). This paper shows that the spectral parameter a is linked to wave steepness, for wind sea and swell; presents a simple model for wave transformation across the surf zone; and shows that the spectral theory provides data similar to the results of Bretschneider (1958) for shallow water wave growth.


1978 ◽  
Vol 1 (16) ◽  
pp. 24 ◽  
Author(s):  
S.V. Hsiao ◽  
O.H. Shemdin

The dissipation of wave energy by various bottom mechanisms plays an important role in the spectral transformation of waves as they propagate from deep to shallow water. Three bottom dissipation mechanisms are discussed. The bottom friction mechanism is investigated in detail and a method for calculating the friction coefficient is proposed. The method is tested by comparison with field measurements. Dissipation due to percolation and bottom motion are also discussed. The magnitude of dissipation rates induced by the different mechanisms are compared under various wave and bottom conditions.


2014 ◽  
Vol 46 ◽  
pp. 181-189 ◽  
Author(s):  
Benjamin Akers ◽  
David P. Nicholls
Keyword(s):  

2021 ◽  
Vol 106 ◽  
pp. 25-44
Author(s):  
Mohammad-Amir Fallah ◽  
Mehdi Monemi

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