An amplitude equation for surface gravity wave-topography interactions
نویسندگان
چکیده
منابع مشابه
Nearshore Wave-topography Interactions
The principal focus of this program has been on understanding the nearshore problem from a top down point of view. At time scales longer than storm periods and length scales larger than 100 meters, the behavior of the nearshore appears surprisingly complex, with subtantial interannual variability and variability on all scales. We believe that this results from feedback between the fluid and bat...
متن کاملAmplitude-preserving wave-equation imaging
We recover the amplitudes of the reflectivity function obtained by wave-equation migration by compensating for the amplitude distortions created by the imaging condition and by the incomplete reflector illumination. The amplitude effects produced by the imaging condition must be taken into account even for simple velocity models, and they are perfectly compensated by a diagonal scaling in the f...
متن کاملAmplitude-preserved wave-equation migration
We analyze the amplitude variation as a function of reflection angle (AVA) for angle-domain common image gathers (ADCIG) produced via wave-equation migration. Straightforward implementations of the two main ADCIG methods lead to contradictory, thus inaccurate, amplitude responses. The amplitude inaccuracy is related to the fact that downward-continuation migration is the adjoint of upward-conti...
متن کاملSimulation of Gravity Wave Propagation in Free Surface Flows by an Incompressible SPH Algorithm
This paper presents an incompressible smoothed particle hydrodynamics (SPH) model to simulate wave propagation in a free surface flow. The Navier-Stokes equations are solved in a Lagrangian framework using a three-step fractional method. In the first step, a temporary velocity field is provided according to the relevant body forces. This velocity field is renewed in the second step to include t...
متن کاملInternal wave attractors over random, small-amplitude topography
We consider whether small-amplitude topography in a two-dimensional ocean may contain internal wave attractors. These are closed orbits formed by the characteristics (or wave beam paths) of the linear, inviscid, steady-state Boussinesq equations, and their existence may imply enhanced scattering and energy decay for the internal tide when dissipation is present. We develop a numerical code to d...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2018
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.3.124802