scholarly journals A method for estimating wind-wave growth and decay in shallow water with high values of bottom friction / by Frederick E. Camfield.

1977 ◽  
Author(s):  
Frederick E. Camfield
Keyword(s):  
Shallow Water ◽  
Wind Wave ◽  
Bottom Friction ◽  
Wave Growth

Wind Wave Growth in Shallow Water

1985 ◽  
Vol 111 (4) ◽  
pp. 765-770 ◽  
Author(s):  
Charles L. Vincent ◽  
Steven A. Hughes
Keyword(s):  
Shallow Water ◽  
Wind Wave ◽  
Wave Growth

The fractional power law of wind wave growth in deep water for short fetch

2002 ◽  
Vol 1 (2) ◽  
pp. 105-108 ◽  
Author(s):  
Guan Changlong ◽  
Sun Qun ◽  
Philippe Fraunie
Keyword(s):  
Power Law ◽  
Deep Water ◽  
Wind Wave ◽  
Fractional Power ◽  
Wave Growth

Effect of varied atmospheric stability on sea surface drag in shallow seas and its impact on wind-wave growth

2008 ◽  
Vol 49 (2) ◽  
pp. 213-224 ◽  
Author(s):  
R. Rajesh Kumar ◽  
B. Prasad Kumar ◽  
A. N. V. Satyanarayana ◽  
D. Bala Subrahamanyam ◽  
A. D. Rao ◽  
...  
Keyword(s):  
Wind Wave ◽  
Atmospheric Stability ◽  
Sea Surface ◽  
Surface Drag ◽  
Wave Growth ◽  
Shallow Seas

scholarly journals Quasi-linear approximation for description of turbulent boundary layer and wind wave growth

2018 ◽  
Vol 26 ◽  
pp. 194-203
Author(s):  
Yu. Troitskaya ◽  
O. Druzhinin ◽  
D. Sergeev ◽  
A. Kandaurov ◽  
O. Ermakova ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Linear Approximation ◽  
Wind Wave ◽  
Wave Growth

Research on Wind Wave Considering Nonlinear Dispersion Effect

2013 ◽  
Author(s):  
Xiejun Shu ◽  
Peng Hou ◽  
Hua Zhuang ◽  
Mingli Zhao
Keyword(s):  
Wind Speed ◽  
Wind Wave ◽  
Order Term ◽  
Offshore Wind ◽  
Nonlinear Dispersion ◽  
Dispersion Effect ◽  
Linear Dispersion ◽  
Offshore Area ◽  
Wave Growth ◽  
Open Sea

Understanding of the offshore wind wave status plays a guiding role in surrounding marine engineering constructions, marine traffic, sea farming, etc. Further study is beneficial to marine economy development, as well as to the academic value of wave theory. This paper primarily introduces the deduction of new wind wave growth relations. Firstly, a new relation formula between wave steepness and wave age was deduced by combining the 3/2 power law developed by Toba with the nonlinear dispersion relation deduced by Li, and by ignoring the effect of water depth. And when the higher-order term was ignored, the relation formula can be simplified as that based on linear dispersion. Secondly, based on the combination of this new relation formula with the significant wave energy balance equation, new wind wave growth relation formulae including the wave non-linear dispersion effect were deduced. When the deduced growth relation formulae were applied in offshore area of Jiangsu incorporating with Mitsuyasu’s empirical formula about the open sea fetch and wind speed, accurate open sea wave parameters of Jiangsu can be formulated by only considering one parameter, such as wind speed. Overall, as this methodology avoided the uncertainty about the fetch of open ocean and operation error during the calculation process, results gained from this report had higher accuracy than other published formulae, and results were validated by NCEP reanalyzing data of Jiangsu offshore area and other researches.

Stability of jets in a shallow water layer

2015 ◽  
Vol 25 (2) ◽  
pp. 358-374 ◽  
Author(s):  
Zhanhong Wan ◽  
Saihua Huang ◽  
Zhilin Sun ◽  
Zhenjiang You
Keyword(s):  
Reynolds Number ◽  
Stability Analysis ◽  
Shallow Water ◽  
Large Scale ◽  
Bottom Topography ◽  
Bottom Friction ◽  
Rossby Number ◽  
Content Type ◽  
The Stability ◽  
Topographic Parameters

Purpose – The present work is devoted to the numerical study of the stability of shallow jet. The effects of important parameters on the stability behavior for large scale shallow jets are considered and investigated. Connections between the stability theory and observed features reported in the literature are emphasized. The paper aims to discuss these issues. Design/methodology/approach – A linear stability analysis of shallow jet incorporating the effects of bottom topography, bed friction and viscosity has been carried out by using the shallow water stability equation derived from the depth averaged shallow water equations in conjunction with both Chézy and Manning resistance formulae. Effects of the following main factors on the stability of shallow water jets are examined: Rossby number, bottom friction number, Reynolds number, topographic parameters, base velocity profile and resistance model. Special attention has been paid to the Coriolis effects on the jet stability by limiting the rotation number in the range of Ro∈[0, 1.0]. Findings – It is found that the Rossby number may either amplify or attenuate the growth of the flow instability depending on the values of the topographic parameters. There is a regime where the near cancellation of Coriolis effects due to other relevant parameters influences is responsible for enhancement of stability. The instability can be suppressed by the bottom friction when the bottom friction number is large enough. The amplification rate may become sensitive to the relatively small Reynolds number. The stability region using the Manning formula is larger than that using the Chézy formula. The combination of these effects may stabilize or destabilize the shallow jet flow. These results of the stability analysis are compared with those from the literature. Originality/value – Results of linear stability analysis on shallow jets along roughness bottom bed are presented. Different from the previous studies, this paper includes the effects of bottom topography, Rossby number, Reynolds number, resistance formula and bed friction. It is found that the influence of Reynolds number on the stability of the jet is notable for relative small value. Therefore, it is important to experimental investigators that the viscosity should be considered with comparison to the results from inviscid assumption. In contrast with the classical analysis, the use of multi-parameters of the base velocity and topographic profile gives an extension to the jet stability analysis. To characterize the large scale motion, besides the bottom friction as proposed in the related literature, the Reynolds number Re, Rossby number Ro, the topographic parameters and parameters controlling base velocity profile may also be important to the stability analysis of shallow jet flows.

Sign in / Sign up

Export Citation Format

Share Document