Author(s)

D. Lörstad, L. Fuchs

Abstract

A Volume of Fluid (VOF) method for handling solid objects using fixed Cartesian grids D. Lorstad & L. Fuchs Department of Heat and Power Engineering, Lund Institute of Technology, Sweden. Abstract Volume of Fluid (VOF) is used to compute the flow of fluids past arbitrarily shaped solid objects using Cartesian grids. The approach allows one to handle both stationary and moving boundaries with at least second order accuracy at the boundary. The scheme uses a basic finite-difference scheme on a staggered grid, which can be enhanced to higher order using defect corrections. The boundary treatment is done by a variant of the Volume of Fluid (VOF) method. The VOF approach is employed only in cells that are affected by the boundary. The grid system includes option of locally refined grids. The system of equations is solved using a multi-grid method that utilises the global and local grid structure. The current implementation eliminates the problem of slow convergence due to the irregular

Keywords