We present an analytical solution for the scattering of linear progressive waves by a surface rectangular obstacle above muddy seabed. The bottom cohesive mud is assumed to act as Newtonian fluid, and thickness layer considered be comparable Stokes boundary thickness. Our results based on matched eigenfunction expansions incorporate combined effects obstacles fluid bottom. By reducing or dimens...

The optimal shape of a two dimensional turbulator above an isothermal flat plate is found by using numerical simulation. The turbulent boundary layer over the flat plate was disrupted at various situations by inserting a quadrilateral bar where the boundary layer thickness kept more than three times greater than the insert\'s height. As a result, the overall heat transfer coefficient of the wal...

Density or gravity currents have been always one of the main causes for sedimentation along many of the dam reservoirs. So controlling this phenomenon is very important for increasing useful life of such reservoirs. In this research study the effect of a combination of rough bed and obstacle on the control of sedimentary density current has been investigated. Experiments were conducted in a til...

The majority of observations of Interplanetary Coronal Mass Ejections (ICMEs) are made with a single spacecraft and their properties inferred from a fit to a cylindrically symmetric model. This process produces a single dimension for a magnetic cloud, its radial thickness. If the radius of curvature of an ICME were equal to its half thickness, the shock front driven by the ICME would be at a di...

Abstract The Artificial Thickened Flame (ATF) method, which involves artificially increasing the flame thickness so as to simulate with a coarse grid resolution, is applied reduce computational cost of predicting Deflagration Detonation Transition (DDT) in tube repeated obstacles. While simulation results depended on parameter N (the number points laminar thickness), it was found that values mo...

A blunt obstacle in the path of a rapid granular avalanche generates bow shock (a jump thickness and velocity), region static grains upstream obstacle, grain-free downstream. Here, it is shown that this interaction qualitatively altered if incline on which flowing changed from smooth to rough. On rough incline, friction between depends flow speed, allows both (supercritical) slow (subcritical) ...

density or gravity currents have been always one of the main causes for sedimentation along many of the dam reservoirs. so controlling this phenomenon is very important for increasing useful life of such reservoirs. in this research study the effect of a combination of rough bed and obstacle on the control of sedimentary density current has been investigated. experiments were conducted in a til...

This paper investigates the electroosmotic micromixing of non-Newtonian fluid in a microchannel with wall-mounted obstacles and surface potential heterogeneity on obstacle surface. In numerical simulation, full model consisting Navier–Stokes equations Poisson–Nernst–Plank are solved for field, ion transport, electric power law is used to characterize rheological behavior aqueous solution. The m...

Images are captured during inclement weather conditions such as fog, sand, and mist, that images are called as hazy images. Those images are frequently feature degraded visibility and unwanted color cast effects. Due to these effects, original image may not be clear. In such situation Laplacian-based visibility restoration approaches usually cannot adequately restore images due to poor estimati...

The present paper deals with an exact semi-analytical formulation of a combined conductive-radiative heat transfer, applied to two-dimensional semi-transparent medium carrying square centered obstacle. gray participating black boundaries absorbs, emits but does not scatter radiation. One intends evaluate the temperature and radiative flux distributions within medium. transfer equation has been ...