Seminar - Sally Williams - Interfacial Waves over a Poroelastic Seabed
Wednesday, October 26, 2005, 1.10 - 1.50 pm
Civil Engineering Lecture Theatre 3
Any hydrostatically stable density stratification can support gravity waves. Since large variations of temperature and salinity occur within many natural water bodies internal gravity waves are a common, though often inconspicuous, occurrence.
In this seminar a theoretical model for the propagation of a two-dimensional progressive interfacial gravity wave over a porous seabed will be presented. Using a nonlinear perturbation method a second-order analytical solution is derived for a two-layered fluid system assuming potential flow of miscible, inviscid and incompressible fluids which, except for motions induced by waves, are at rest. The effects of geometric and flow parameters such as ratios of depths and densities of the two fluids and seabed characteristics will be studied and discussed.