A Bingham-plastic model for fluid mud transport under waves and currents

A Fluid Mud Transport Model in Multi-dimensions

It is important to understand the fate of terrestrial sediment into the coastal ocean, because it determines for example the seabed properties and the turbidity of the water column. Several recent initiatives, such as NOPP Community Sediment Transport Model, MURIUnderstading Wave-Mud Interaction and Tidal Mud Flats DRI have put forward new outstanding science and technical questions for coastal...

Peristaltic transport of a Bingham fluid through a porous medium in a channel under the effect of a magnetic field

Low-mobility Transport of Coarse-grained Bed Material under Waves and Currents

Rubble mound near-bed structures are among the more common hydraulic structures. Examples include bottom protections to prevent scour near bridge piers, offshore structures, weirs and sluices and at the toe of bank protections or breakwaters, but also pipe covers on offshore pipelines. The cornerstone of the theory behind the design of these structures was laid by Izbash (1930) and, most notabl...

Taylor-couette Instability of a Bingham Fluid

Stability of a Bingham fluid in Taylor-Couette flow is studied. Of interest is to determine the critical values of the inner and outer cylinder angular velocities which cause the linear instability in the system. We introduce a perturbation into the basic flow, and examine the linearized Navier-Stokes equations for the perturbation. Assuming a normal mode solution for the perturbation, we obtai...

Roll waves in mud

The stability of a viscoplastic fluid film falling down an inclined plane is explored, with the aim of determining the critical Reynolds number for the onset of roll waves. The Herschel–Bulkley constitutive law is adopted and the fluid is assumed two-dimensional and incompressible. The linear stability problem is described for an equilibrium in the form of a uniform sheet flow, when perturbed b...