Eigen Record modes

Eigen Record modes = <int>

Description/Usage

This optional card determines how many of the converged modes should have their eigenvectors written to exodus II files. The valid input is:

0<=n<=N

This requests that n exodus II outputs be written. n can be no larger than N, the value supplied in the Eigen Number of modes card.

The default value of n is 0.

Examples

Here is a sample card:

Eigen Record modes = 5

Technical Discussion

This card is especially important when the 3D stability of a 2D flow is being computed. Each of the requested normal mode wave numbers receives n outputs, so the number of files written can become quite large if the user isn’t careful.

This card is applicable to both eggroll and ARPACK eigensolvers. When eggroll is used, the name of the output file is LSA_<i>_of_n_<out_name>, where <i> is the ith mode (of n), and <out_name> is the name of the regular Exodus II output file (from the Output Exodus II file card), including any extension if there was one. In the case of 3D stability of a 2D flow, the output file is LSA_<i>_of_n_wn=<f>_<out_name>, where <f> corresponds to the value of the normal mode (see the Eigen Wave Numbers card). When ARPACK is used, these files will have the base name specified by the Eigenvector Output File card, similarly augmented with mode and wave numbers.

Theory

No Theory.

FAQs

No FAQs.

References

No References.