Abstract. Volume Of Fluid (VOF) is one of the most powerful methods to resolve free surface
ows.
In this study, a new algorithm is developed in a curvilinear coordinate system, which implements an
implicit pressure based method (SIMPLE) with a staggered grid and a Lagrangian propagation of the
interface, using the VOF method in the computational domain. Based on this algorithm, a computer code
is generated and two test cases of dam-breaking problems, both in curvilinear and Cartesian grid systems,
are examined and, then, two applications of this method, including
ow through a curved gate under a
dam and the impact problem of a circular cylinder, are presented. The results show good agreement with
experimental and other computational results.