18.4. Example Model Using Hydrostatic Fluid Elements
The following example shows an axisymmetric model of a cylinder-piston arrangement. The contained
fluid in the cylinder is modeled with hydrostatic fluid elements, shown as triangular elements in the
figure below.
Figure 18.2: Meshed Model
Due to the gap between the cylinder and piston, a hydrostatic fluid element with no underlying solid
elements is added manually. The node numbering on this hydrostatic fluid element is reversed to
achieve a negative fluid volume that balances the extra fluid volume created by hydrostatic fluid elements
attached to the cylinder above the piston. The figure below shows a close-up view of the node num-
bering in the area where the hydrostatic fluid element with negative volume and no underlying solid
element is defined.
Figure 18.3: Close-up View of Meshed Model
The following sequence of commands generat es this model, including the hydrostatic fluid elements,
material models, and boundary conditions.
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationExample Model Using Hydrostatic Fluid Elements