The implementation of a parallel algorithm for estimating non-rigid motion vectors using a semi-fluid motion model applied to time-varying satellite imagery is described. Deformable motion tracking of non-rigid biological objects and remotely sensed objects such as clouds, atmospheric aerosols and gases, polar sea ice, or ocean currents are important application domains for the Semi-fluid Motio...

In this paper we present a tutorial on the implementation of both a grid based and a particle based fluid simulator for computer graphics applications. Many research papers on fluid simulation are readily available, but these papers often assume a very sophisticated mathematical background not held by many undergraduates. Furthermore, these papers tend to gloss over the implementation details, ...

High-resolution twoand three-dimensional numerical simulations are performed of first-mode internal gravity waves interacting with a shelf break in a linearly stratified fluid. The interaction of nonlinear incident waves with the shelf break results in the formation of upslope-surging vortex cores of dense fluid (referred to here as internal boluses) that propagate onto the shelf. This paper pr...

9 A surprising phenomenon witnessed by many is the sinking bubbles seen in a settling pint of 10 stout beer. Bubbles are less dense than the surrounding fluid so how does this happen? Previous 11 work has shown that the explanation lies in a circulation of fluid promoted by the tilted sides of the 12 glass. However, this work has relied heavily on computational fluid dynamics (CFD) simulations....

We consider the fluid mechanical problem of identifying the critical yield number Yc of a dense solid inclusion (particle) settling under gravity within a bounded domain of Bingham fluid, i.e., the critical ratio of yield stress to buoyancy stress that is sufficient to prevent motion. We restrict ourselves to a two-dimensional planar configuration with a single antiplane component of velocity. ...

We have studied a model of a complex fluid consisting of particles interacting through a hard-core and short-range attractive potential of both Yukawa and square-well form. Using a hybrid method, including a self-consistent and quite accurate approximation for the liquid integral equation in the case of the Yukawa fluid, perturbation theory to evaluate the crystal free energies, and mode-coupli...

It has long been established that UVC light is a very effective method for inactivating pathogens in a fluid, yet the application of UVC irradiation to modern biotechnological processes is limited by the intrinsic short penetration distance of UVC light in optically dense protein solutions. This experimental and numerical study establishes that irradiating a fluid flowing continuously in a micr...

Sedimentary beds of alternating red and green colour are commonly interpreted to reflect orbitally-forced cyclic climatic, syn-depositional conditions, although changes caused by post-depositional fluids also documented. Results from IODP Hole U1502A marine sediments in the South China Sea exemplify reducing fluid–rock interactions that locally changed sediment green. Petrographic, rock magneti...

A frame $L$ is called {it coz-dense} if $Sigma_{coz(alpha)}=emptyset$ implies $alpha=mathbf 0$. Let $mathcal RL$ be the ring of real-valued continuous functions on a coz-dense and completely regular frame $L$. We present a description of the socle of the ring $mathcal RL$ based on minimal ideals of $mathcal RL$ and zero sets in pointfree topology. We show that socle of $mathcal RL$ is an essent...

We consider the flow of two immiscible fluids lying between concentric cylinders when the outer cylinder is fixed and the inner one rotates. The interface is assumed to be concentric with the cylinders, and gravitational effects are neglected. We present a numerical study of the effect of different viscosities, different densities and surface tension on the linear stability of the Couette flow....