Comparing non-linear mechanisms of the EDI observed in experiment and simulation

[zachbrwn]

As discussed toward the end of session 1 it is currently difficult to confirm observed non-linear processes seen in simulations with experimental data. As presented by Dr. Jorns, an application of the bispectral analysis technique of Ritz and Kim to probe data has yielded estimates of the linear growth rate and non-linear energy transfer. This technique also produces an estimate of the quadratic coupling coefficient for three-wave interactions. While this doesn't directly demonstrate the type of non-linear mechanism occurring it does provide a reference that can be compared to simulations results.

While originally made for experimental methods, the Ritz and Kim method can be readily applied to simulation data. I'd invite modelers to apply the Ritz and Kim technique to the results of their simulations so a more direct comparison be made to the experimental observations.

Kim Method: https://aip.scitation.org/doi/pdf/10.1063/1.871572

[mariomerinomartinez]

Hello Zach, and thank you for your point.
To facilitate me and others finding more about the Ritz and Kim method. Could you perhaps leave here a link to the original article?
Thanks,
Mario

[zachbrwn]

Hi Mario,

Kim's paper is this one: https://aip.scitation.org/doi/pdf/10.1063/1.871572
It also sufficiently details the Ritz method that is extended in this work.

Zach