The liquid metal flow and the solidification behaviours in a multi-cavity casting mould of two automotive cast parts were simulated in three dimensions. The commercial code, FLOW-3D® was used because it can track the front of the molten metal by a Volume of Fluid (VOF) method and allows complicated parts to be modeled by the Fractional Area/Volume Obstacle Representation (FAVOR) meth...

Abstract In this research, a numerical investigation was carried out on the effect of obstacle presence water flow during dam-break in dry bed. The validity simulations confirmed after comparing results with experimental evidence. Rectangular, trapezoidal and triangle obstacles were simulated numerically to explain flow. Water surface tracking turbulent modeled using Volume Fluid (VOF) method s...

In this paper a simulation model is presented for the Direct Numerical simulation (DNS) of multiphase flow. This method combines the Volume of fluid model and Immersed Boundary method in order to investigate water-oil flow-pattern. The simulations were carried out on structured cartesian adaptive mesh refinement (SAMR), where the the Immersed Boundary represents the circular tube via Direct For...

A novel volume of fluid (VoF) model called explicit diffusion (EVD) is developed for the simulation interfacial flows, including those with turbulence and primary spray atomization. It derived by averaging VoF equations over an explicit, physically-defined length scale. Fluctuations at sub-volume scales, which can arise due to interface dynamics or turbulence, are attenuated process their effec...

The capillary time-step constraint is the dominant limitation on applicable in many simulations of interfacial flows with surface tension and, consequently, governs execution time these simulations. We propose a fully-coupled pressure-based algorithm based an algebraic Volume-of-Fluid (VOF) method conjunction implicit linearised treatment that can breach constraint. advection interface solved t...

amniotic fluid volume (afv) is one of the important parameters in the assessment of fetal well-being. the ability of ultrasound measurements to represent the actual afv is unproven. this study was undertaken to compare correlation of conventional amniotic fluid index (afi) and radial amniotic fluid index (rafi) as a new method with actual fluid volume on phantom. as an experimental study, 10 to...

In this research, experimental investigation and the computational fluid dynamic (CFD) simulation of a cryogenic condenser for oxygen liquefaction was carried out. The liquid nitrogen used as cooling fluid. section, three-dimensional model with structured mesh high quality aspect ratio skewness considered. multi-phase flow inside studied numerically, using volume (VOF) method. This work also ex...

the liquid metal flow and the solidification behaviours in a multi-cavity casting mould of two automotive cast parts were simulated in three dimensions. the commercial code, flow-3d® was used because it can track the front of the molten metal by a volume of fluid (vof) method and allows complicated parts to be modeled by the fractional area/volume obstacle representation (favor) method. the gre...

Many thermohydraulic issues about the safety of light water reactors are related to complicated two-phase flow phenomena. In these phenomena, computational fluid dynamics (CFD) analysis using volume (VOF) method causes numerical diffusion generated by first-order upwind scheme used in convection term fraction equation. Thus, this study, we focused on an interface compression (IC) for such a VOF...