Eigenvector output file

Eigenvector output file = <string>

Description/Usage

This optional card is used to select a custom base name for the EXODUS II files which will be created for writing eigenvectors from the ARPACK eigensolver. The name should be entered as follows:

basename.exoII

Filenames will be basename_modei.exoII

If this card is absent, the default name is LSA.exoII.

Examples

Here is a sample card:

Eigenvector output file = base-EV.exoII

Technical Discussion

The actual filenames are formed from the base filename as follows:

For mode i (zero-based) when not using 3D of 2D LSA: basename_modei.exoII.

When using 3D of 2D LSA with wave number N: basename_modei_wn=N.exoII.

When requesting linear stability analysis during a LOCA continuation run, the eigenvectors from all continuation steps corresponding to a given mode number (or mode number/wave number combination for 3D of 2D) will be written sequentially to the same EXODUS II file. The time stamp for each step will be the eigenvalue, rather than the continuation parameter value. Complex eigenvectors are written as two steps in the same file: first the real part (time-stamped with the real part of the eigenvalue), then the imaginary part (time-stamped with the imaginary part of the eigenvalue).

The inputs Eigenvalue output frequency and Eigenvector output frequency are independent, so if a frequency m is specified for eigenvalues and n for eigenvectors, and n is not a multiple of m, then eigenvectors will be written on step numbers which are common multiples of m and n.

This card is not applicable to the eggroll eigensolver, which has a different default file naming convention with no options.

Theory

No Theory.

FAQs

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References

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