FLUCTUATIONS IN LITTORAL DRIFT
نویسندگان
چکیده
منابع مشابه
Prediction of littoral drift with artificial neural networks
The amount of sand moving parallel to a coastline forms a prerequisite for many harbor design projects. Such information is currently obtained through various empirical formulae. Despite so many works in the past an accurate and reliable estimation of the rate of sand drift has still remained as a problem. The current study addresses this issue through the use of artificial neural networks (ANN...
متن کاملStatistical Properties of the Drift Wave Fluctuations
The nature of turbulence in macroscopically confined plasmas is reviewed and contrasted to turbulence in hydrodynamics. The statistical properties of the fluctuations are analyzed both from the Gibb’s distribution for the soliton gas model of the electrostatic field and for the Hamiltonian field theory equilibrium statistics. For that purpose, nonlinear drift wave equations are derived from two...
متن کاملFluctuations of Brownian Motion with Drift
Consider 3 dimensional Brownian motion started on the unit sphere {|x| = 1} with initial density ρ. Let ρt be the first hitting density on the sphere {|x| = t + 1}, t > 0. Then the linear operators Tt defined by Tt ρ = ρt form a semigroup with an infinitesimal generator which is approximately the square root of the Laplacian. This paper studies the analogous situation for Brownian motion with a...
متن کاملDrift-Alfvén fluctuations associated with a narrow pressure striation
formulation is given in terms of the coupling of the fluctuating axial fields (Ẽz ,B̃z) and incorporates shear and compressional Alfvén waves, drift waves, and ion acoustic waves. The kinetic response of the electrons includes pitch-angle scattering ~Lorentz model! and the ions are treated as a magnetized, cold fluid. Detailed quantitative comparisons of the theoretical predictions are made with...
متن کاملThe influence of magnetic fluctuations on collisional drift-wave turbulence
A two-dimensional isothermal collisional drift-wave turbulence model including magnetic fluctuations is studied numerically. The model has as limits the electrostatic collisional drift-wave and two-dimensional magnetohydrodynamic systems. The electromagnetic and electrostatic regimes for thermal gradient-driven ~drift-wave! turbulence are decided by the parameter b̂5(4pnT/B)(Ls /Ln ), where Ls a...
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: Coastal Engineering Proceedings
سال: 1984
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v19.88