Auxiliary Data

In Auxiliary Data, nodal and elemental distributions are available that provide information on different properties of the finite-element mesh. For 2D models, the flow field can also be visualized using stream functions. Auxiliary data cannot be edited by the user, but the distributions are automatically updated according to changes in the model.

In 2D models, the two elemental distributions Max. interior angle of trian­gles and Delaunay criterion violations exist which can be used to check the mesh quality. In 3D models, the additional distributions Slice distance and Layer thickness are provided which can also be used as parameters in the Expression Editor. For 2D models, a nodal distribution for the Vorticity stream function is available. In transport models, the elemental distribution Péclet Number is available which can be used to check whether the spatial discretization is sufficiently fine for a specific transport problem. As the calcu­lation of the Péclet Number is based on velocities, parameter values are only available during a simulation or when a full results file (*.dac) is loaded.

The Auxiliary Data is classified below depending on either they are physically-based or geometrically-based. These parameter are for visualization only, they are calculated automatically and cannot be manually modified. The number of parameters showing in this section depends on the properties of the model (mesh geometry, dimension, ...).

Physically-Based Parameters

• Fluid density
• Fluid viscosity
• Pseudo saturation
• Relative permeability
• Péclet number
• Courant number
• Vorticity stream function

Geometrically-Based Parameters

• Slice distance
• Nodal depth
• Layer thickness
• Elemental volumes
• Elemental diameters
• Max. interior angle of triangles or quadrangles
• Delaunay criterion violations
• Min. dihedral angles
• Max. dihedral angles
• Aspect ratio: in [1:infinity], optimal range [1-3]
• Condition number: in [1:infinity], optimal range [1-3]
• Aspect ratio gamma: in [1:infinity], optimal range [1-3]
• Aspect ratio beta: in [1:infinity], optimal range [1-3]
• Squish index: in [0:1], 0 is good, 1 is poor