WIT Press


Fast Continuity Correction Method For Computation Of Incompressible Fluid Flows With Free Surface

Price

Free (open access)

Paper DOI

10.2495/FSI030391

Volume

71

Pages

10

Published

2003

Size

329.29 kb

Author(s)

H. Kim

Abstract

Fast continuity correction method for computation of incompressible fluid flows with free surface H. Kim Department of Civil 8 Environmental Engineering, Kookmin University, Seoul, Korea Abstract A new effective numerical scheme for the treatment of excess mass is described here. The scheme was incorporated in the new numerical model, KU-2DVFF-03. The excess masses generated during the computation of the momentum equations should be pushed away from the grid point of interest to satisfy the continuity equation. The present method adopted "double-double sweep" procedure to relocate the excess masses in contrast to the previous even distribution in the 4 directions. The free surface was either vertical or horizontal in the existing models, e.g. NASA-VOF2D. The free surface is treated differently from previous methods. The slopes are assumed to be vertical, horizontal, or 45 "-inclined in the new scheme. The water levels are defined on the horizontal center-line, vertical center-line, or 45 '-in

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