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LLNL / libROM

Model reduction library with an emphasis on large scale parallelism and linear subspace methods
https://www.librom.net
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DMD with shifted data #123

Closed siuwuncheung closed 1 year ago

siuwuncheung commented 2 years ago

In junction with Laghos PR#171.

This PR adds the capability of shifting the snapshot data in DMD using offsets and predicting derivatives. Corresponding prediction formula is implemented.

Although the motivation of adding this capability is to work on the Laghos examples with zero initial conditions in velocity (triple point expansion and Sedov blast explosion), a few test runs show that these new capabilities do not provide sufficiently accurate predictions yet. In the future, more investigations are needed on Laghos and these capabilities shall be applied to other MFEM examples, but they are not urgent.

dylan-copeland commented 2 years ago

Are there any examples in libROM, or just Laghos?

siuwuncheung commented 2 years ago

Are there any examples in libROM, or just Laghos?

It is just used in Laghos now. In a future PR I will add the usage to other MFEM examples.

siuwuncheung commented 1 year ago

LGTM