Event Title

P-34 LIGO BayesWave Signal Algorithm

Location

Buller Hall 150

Start Date

3-11-2022 1:30 PM

End Date

3-11-2022 3:30 PM

Department

Physics

Description

Kelvin-Helmholtz vortices frequently develop at the magnetopause boundary of planetary magnetospheres. The nonlinear development of vortices involves coalescence, where smaller vortices combine into larger vortices in an inverse cascade. Large-scale structures tend to grow slower, yet saturate at larger amplitude, so the shift in scale may simply result from small-scale structures nonlinearly saturating while large-scale structures grow linearly. Alternatively, energy could be transferred between scales through nonlinear cross-scale turbulent coupling. We utilize transfer entropy to explore cross-scale coupling in hybrid simulations of Kelvin-Helmholtz instability. The analysis provides evidence that nonlinear coupling across scales is important in the coalescence process and identifies the temporal and spatial scales over which the coupling occurs.

Acknowledgments

Advisor: Jay Johnson, Engineering & Physics

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Mar 11th, 1:30 PM Mar 11th, 3:30 PM

P-34 LIGO BayesWave Signal Algorithm

Buller Hall 150

Kelvin-Helmholtz vortices frequently develop at the magnetopause boundary of planetary magnetospheres. The nonlinear development of vortices involves coalescence, where smaller vortices combine into larger vortices in an inverse cascade. Large-scale structures tend to grow slower, yet saturate at larger amplitude, so the shift in scale may simply result from small-scale structures nonlinearly saturating while large-scale structures grow linearly. Alternatively, energy could be transferred between scales through nonlinear cross-scale turbulent coupling. We utilize transfer entropy to explore cross-scale coupling in hybrid simulations of Kelvin-Helmholtz instability. The analysis provides evidence that nonlinear coupling across scales is important in the coalescence process and identifies the temporal and spatial scales over which the coupling occurs.