A hybrid VOF–Lagrangian method for simulating the aerodynamic breakup of liquid droplets induced by a traveling shock wave is proposed and tested. The droplet deformation fragmentation, together with subsequent mist development, are predicted using fully three-dimensional computational fluid dynamics model following unsteady Reynolds-averaged Navier–Stokes approach. main characteristics aerobre...

Abstract The melting behavior of a fayalitic slag was investigated with computational fluid dynamics and validated experimental data. A heating microscope employed to perform typical ash (AMB) test, in order gain information about the slag. numerical approach is based on using volume (VOF) method, track interface between gas phases, enthalpy–porosity model, simulate as phase change material (PC...

The problem of normal incidence impact with solidification of a spherical liquid metal droplet onto a rigid planar substrate is studied. The Navier-Stokes equations are solved using a finite-volume formulation with a fixed grid. The free surface of the droplet is tracked by the volume-of-fluid (VOF) method. The surface tension on the droplet surface is evaluated by a continuum surface force (CS...

The paper presents a three-dimensional numerical investigation of a droplet impinging normally onto a wall film. The numerical method is based on the finite volume solution of the Navier–Stokes equations coupled with the volume of fluid method (VOF) and utilizing an adaptive local grid refinement technique for tracking more accurately the liquid–gas interface. The results are compared with avai...

R. Zagórski, S. Golak – Silesian University of Technical, Department of Management and Computer Science, Katowice, Poland The paper deals with computer simulation of gravity casting of the metal matrix composites reinforced with ceramics (MMC) into sand mold . The subject of our int erest is aluminum matrix c omposite (AlMMC) reinforced with c eramic particles i.e. silicon carbide SiC and glass...

The Navier–Stokes equations for unsteady, incompressible, viscous fluids in the axisymmetric coordinate system are solved using a control volume method. The volume-of-fluid (VOF) technique is used to track the free-surface of the liquid. Model predictions are in good agreement with experimental measurements. It is found that the dynamic processes after impact are sensitive to the initial drople...

Heat & fluid flow conservation equations of carburant liquid droplet are solved by a semi-implicit method the Volume Of Fluid ( VOF ) scheme. A new technique radius regression estimation based on Piece-wise Linear Interface Calculation PLIC is developed. Numerical computation performed for stagnant droplets in evaporation natural convection (which takes into consideration buoyancy forces) and a...

Recently, machine learning has been used to substitute parts of conventional computational fluid dynamics (CFD) solvers, e.g., the cell face reconstruction in finite-volume method or curvature computation Volume-of-Fluid (VOF) method. The latter showed improvements terms accuracy for coarsely resolved interfaces, however at expense convergence and symmetry. In this work, a hybrid data-driven ap...

A volume-of-fluid (VOF) based numerical study on the spin-affected droplet separation of off-center collisions is presented. The roles orbital angular momentum ${L}_{o}$ and spin ${L}_{s}$ in affecting are illustrated by changing chirality spin, showing that an augmented total can promote stretching suppress reflexive separation. unified theoretical model conservation laws proposed to qualitati...

there are different methods to reduce drag in high speed hulls. one of these methods is a change in the shape of the body by adding longitudinal side tunnels. in this paper it has been attempted to determine the influence of the tunnel height on hydrodynamic characteristics of the hull to achieving an optimum shape for the tunnel. to achieve this purpose, numerical simulation of the problem has...