It is used for large amplitude free surface sloshing in a rigid tank subjected to a vertical or horizontal ground motion. In this case, only fluid nodal y-coordinates are updated after each iteration according to the free surface new location.
1-5 Lower left corner node (N1 ) 6-10 Lower right corner node (N2 ) 11-15 Upper left corner node (N4 ) 15-20 First curve nodal increment (I1 ) 21-25 Fourth curve nodal increment (I4 ) 26-30 Number of layers (NZ ) 31-35 Layer increment (IZ )If the vertical direction remeshing is used, NREL should be set appropriately to account for mesh motion in the horizontal direction.