A numerical algorithm based on the Volume of Fluid
technique, is used to study the impact loading of liquid
sloshing in partially filled enclosed prismatic tanks
subject to large amplitude excitation. A moving coordinate
system fixed to the tank is introduced. Based on the
Navier-Stokes equations, finite difference equations are
solved. The entire flow configuration is advanced through
a finite increment of time. In transporting the fluid
through the mesh, an improved donor-acceptor method which
takes into account surface orientation and transports
trapezoidal shapes from cell to cell is used. The results
obtained using the simple and improved schemes are compared.
It is shown that a long time simulation can be achieved for
both shallow and deep liquid sloshing.