Rayleigh-Taylor instability in a compressible fluid is reconsidered. The density is allowed to vary with pressure under the barotropy assumption. For the case with equal speeds of sound in the two superposed fluids, in order to give a non-trivial compressibility correction to the Rayleigh-Taylor growth rate, the compressibility correction is calculated to O(g/ka). To this order, compressibility...

Novel methods are presented in this initial study for the fusion of GPU kernels artificial compressibility method (ACM), using tensor product elements with constant Jacobians and flux reconstruction. This is made possible through hyperbolisation diffusion terms, which eliminates expensive algorithmic steps needed to form viscous stresses. Two approaches presented, offer differing levels paralle...

runoff is one of the major components of calculating water resource processes and is the main issue in hydrology. many concept models are used to predict the amount of runoff, which in most cases depend on topographical and hydrological data. conventional models are not appropriate for areas in which there is little hydrological data. changes in runoff are nonlinear, meaning it is time & space ...

An Artificial Compressibility Characteristic Based Split Scheme (CBS-AC) employed in FEM is used to predict the flow pattern in Cavopulmonary vascular system. Such type of flow is very complex due to varying nature of flow through SVC (Super Vena Cava) and IVC (Inferior Vena Cava), confluence at T-junction, recirculation etc,. In this work, numerical simulations are performed to extend the appl...

A filtration devise was developed to assess compressibility of fouling layers in membrane bioreactors. The system consists of a flat sheet membrane with air scouring operated at constant transmembrane pressure to assess the influence of pressure on resistance of fouling layers. By fitting a mathematical model, three model parameters were obtained; a back transport parameter describing the kinet...

In this study, we present a method to perform a numerical simulation of the flow dynamics of the Cerebrospinal Fluid (CSF) based on anatomical Magnetic Resonance Images (MRI). The Computational Fluid Dynamics (CFD) software, written in language C, integrates different numerical schemes to solve the governing equations. The time derivatives were discretized using the Crank-Nicolson scheme. The e...

in a closed die forging process, it is impossible to form complex shapes in one stage, and thus it becomes necessary to use preform dies. in the present study, backward deformation method and fe simulation via abaqus software has been used in order to design preform die of the h-shaped parts. in the backward deformation method, the final shape of the part is considered as a starting point and u...

the purpose of this study was identifying rangeland development andrestoration operations targets. this study was conducted in hossein abad bazoft basinwith 7162 ha area, located in south east of farsan county, chaharmahal and bakhtiariprovince, iran. the basin has various land uses including rangeland, forest, irrigated farmand garden, dry farm, residential area and rock mass. in this study, d...

This paper presents the compressibility of tropical peat reinforced with cylindrical cement columns. When a cement column is installed vertically in peat, its compressibility is reduced because of the hardened skeleton matrix formed by cement particles bonding with adjacent soil particles in the presence of pore water. The effects of the cement column diameter on the compressibility have been i...