CST2013: Eigenmode Solver Specials (Tetrahedral)

Simulation: Solver Start Simulation Eigenmode Solver Specials

Special solver controls frame

Accuracy: Enter a value for the desired solver accuracy in terms of the eigensystem's relative residual.

Consider static modes: If the box is checked then the static modes are saved and can be accessed via the result tree. Otherwise the static modes are not saved.

Calculate thermal losses: This setting allows to activate or deactivate the surface loss calculation for the thermal coupling.

Solver order frame:

Allows to specify whether the Eigenmode solver with tetrahedral mesh uses a first, second or third order method. Second order is the default. If the structure is geometrically complex, first-order is an alternative. Higher order allows to achieve accurate results with less mesh cells and possibly less memory consumption than lower order, if the structure contains electrically large voids rather than many geometric details. For a given mesh resolution, higher order will provide even more accurate results.

Curvature... It is recommended to increase the curved element order, which is a property of the mesh, if the solver order is increased. The button directly opens the special tetrahedral mesh properties where the Curved element order can be changed.

Materials frame

Evaluation frequency: These settings apply to the eigenmode solver with tetrahedral mesh and to the eigenmode solver with hexahedral mesh and the JD method, if Consider losses in postprocessing only is deactivated in the Eigenmode Solver Parameters dialog.

Electrically or magnetically conductive materials and dispersive materials are evaluated either at the Center frequency, or at some Other frequency. This yields a complex permittivity and reluctivity which is assumed to be frequency independent, as shown in the Eigenmode Solver Overview.

Constant fit and dispersion fit as in Time Domain: Check this box to consider the fit procedure of the tangent delta settings in the Material Parameter Conductivity Dialog using a dispersive Debye model correspondent to the time domain. By deactivating this button the constant fit option is realized as a constant tangent delta over the complete frequency range while a dispersive fit results in a linear interpolation between the defined loss angle values. The setting also affects the treatment of dispersive materials if the model simplification is configured so that lossy materials are treated as lossfree.

OK

Accepts the changes and closes the dialog.

Cancel

Closes this dialog box without performing any further action.

Help

Shows this help text.