Inflation of Ponded, Particulate Laden Density Currents

Hydrodynamics Analysis of Density Currents

Density Current is formed when a fluid with heavier density than the surrounding fluid flows down an inclined bed. These types of flows are common in nature and can be produced by; salinity, temperature inhomogeneities, or suspended particles of silt and clay. Driven by the density difference between inflow and clear water in reservoirs, density current plunges clear water and moves towards a d...

Effect of particle inertia on the dynamics of depositional particulate density currents

In this work we address the effect of particle inertia on depositional particulate density currents. We employ a two-fluid model based on the equilibrium Eulerian approach and present highly resolved two-dimensional (2D) simulations of the flow for a Reynolds number of 3450 (this particular choice corresponds to values of Grashof number Gr of 1:5 10).The simulations capture physical aspects of ...

Numerical Investigation of the Structure of Density Currents in a two Dimensional Channel

Vertical Density Currents-ii

Examples of vertical density currents wholly within the domain of laminar flow, one in a water solution, the other in air, have come to my attention. Both examples illustrate new ways of introducing and dispersing microscopic particles into static fluids and both demonstrate that a stable, clearly defined layer of dispersed particles forms first and that the vertical density currents originate ...

Density perturbation in extended inflation

We examine the calculation of density perturbation at large scales in the inflationary scenario. The formula for its magnitude is reviewed from first principles and applied to the original model of extended inflation. Our estimate is an order of magnitude bigger than the earlier ones due to the difference in the time at which the primordial fluctuation is evaluated and to the inclusion of terms...