Author: Y. ZhaoPublisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Modelling of Wave Propagation in the Nearshore Region Using the Mild Slope Equation with GMRES-based Iterative Solvers
Author: Y. ZhaoNumerical Modeling of Water Waves
Author: Pengzhi LinPublisher: CRC Press
ISBN: 0203937759
Category : Technology & Engineering
Languages : en
Pages : 499
Book Description
Modelling large-scale wave fields and their interaction with coastal and offshore structures has become much more feasible over the last two decades with increases in computer speeds. Wave modelling can be viewed as an extension of wave theory, a mature and widely published field, applied to practical engineering through the use of computer tools. Information about the various wave models which have been developed is often widely scattered in the literature, and consequently this is one of the first books devoted to wave models and their applications. At the core of the book is an introduction to various types of wave models. For each model, the theoretical assumptions, the application range, and the advantages and limitations are elaborated. The combined use of different wave models from large-scale to local-scale is highlighted with a detailed discussion of the application and matching of boundary conditions. At the same time the book provides a grounding in hydrodynamics, wave theory, and numerical methods which underlie wave modelling. It presents the theoretical background and also shows how to use these models for achieving different engineering tasks, illustrated and reinforced with case study examples.
Applied Mechanics Reviews
Author: Journal of Hydrodynamics
Author: Surface Water Modeling
Author: Ching Jen ChenPublisher:
ISBN:
Category : Hydrologic models
Languages : en
Pages : 298
Book Description
Review and Verification of Numerical Wave Models for Near Coastal Areas - Part 1: Review of Mild Slope Equation, Relevant Approximations, and Technical Details of Numerical Wave Models
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Ocean wave propagation is heavily affected by bathymetric variation, particularly in the nearshore areas. In this report, the theoretical basis behind the mild slope equation, which is often used for modeling wave propagation, is discussed. In particular, the theory and technical details of the models REF/DIF1, REF/DIF-S, and RCPWAVE are defined. (REF/DIF-S is an irregular wave version of REF/DIF1.) Two different modifications of the mild slope equation that simplify the modeling of wave propagation for general areas: the parabolic approximation, which is used in the model REF/DIF1 and REF/DIF-S; and the eikonal-transport equations, used in RCPWAVE are examined. The consequences of using either modification is also discussed. Incorporation of relevant physical effects (e.g., wave breaking, bottom friction, etc.) that affect wave propagation in the nearshore area is illustrated.
Numerical Modeling of Waves in the Nearshore Zone with Permeable Structures
Author: Santiago AlfagemePublisher:
ISBN:
Category : Ocean waves
Languages : en
Pages : 148
Book Description
Regional Coastal Processes Numerical Modeling System
Author: Bruce A. EbersolePublisher:
ISBN:
Category :
Languages : en
Pages : 163
Book Description
The numerical model documented here, RCPWAVE, can be used to solve wave propagation problems over arbitrary bathymetry. The governing equations solved in the model are the mild slope equation for linear, monochromatic waves, and the equation specifying irrotationality of the wave phase function gradient. Finite difference approximations of these equations are solved to predict wave propagation outside the surf zone. Inside the breaker zone, an empirical method is used to predict wave transformation. This method is based on a hydraulic jump representation of the entire surf zone. The model is verified using laboratory and field data. A user's manual section is provided to aid potential users. This documentation describes job control language files, job submission procedures, sample input and output files, and execution costs.
Parameterizing the High Frequency Evolution of Nearshore Waves in a Nonlinear Wave Model
Author: Kacey Leigh EdwardsPublisher:
ISBN:
Category : Banks (Oceanography)
Languages : en
Pages : 184
Book Description
CGWAVE: A Coastal Surface Water Wave Model of the Mild Slope Equation
Author: Zeki DemirbilekPublisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description
This report describes a new wave-prediction model called CGWAVE. CGWAVE is a genetal-purpose, state-of-the-art wave prediction model. It is applicable to estimation of wave fields in harbors, open coastal regions, coastal inlets, around islands, and around fixed or floating structures. Both monochromatic and spectral waves can be simulated with the CGWAVE model. While CGWAVE simulates the combined effects of wave refraction-diffraction included in the basic mild-slope equation, it also includes the effects of wave dissipation by friction, breaking, nonlinear amplitude dispersion, and harbor entrance losses. CGWAVE is a finite-element model that is interfaced to the Corps of Engineers' Surface-water Modeling System (SMS) for graphics and efficient implementation (pre-processing and post-processing). The classical super-element technique and a new parabolic approximation method developed recently are used to treat the open-boundary condition. An iterative procedure (conjugate gradient method) is used to solve the discretized equations, thus enabling the modeler to deal with large-domain problems. A detailed derivation of the basic theory of the CGWAVE model is provided in Sections 2 and 3. Sections 4 through 6 provide the details of how this theory is implemented numerically. A step-by-step user's guide is provided in Section 7 to ensure safe and efficient usage of the CGWAVE model for practical applications. Example applications used in the development, testing, and validation of CGWAVE are presented in Section 8 of this report.