Showing 1 - 2 of 2 UKAEA Paper Results
2020
UKAEA-CCFE-PR(20)101
M. Sasaki T. Kobayashi R. O. Dendy Y. Kawachi H. Arakawa S. Inagaki
A method to quantify the energy transfer among turbulent structures using singular value decomposition (SVD) is presented. We apply the method to numerical turbulence data obtained from a global plasma simulation using the Hasegawa-Wakatani fluid model, in which the Kelvin-Helmholtz instability plays a dominant role. Using the SVD method,…
Preprint Published2019
UKAEA-CCFE-PR(19)32
M Sasaki Y Kawachi R O Dendy H Arakawa N Kasuya F Kin K Yamasaki S Inagaki
The novel technique of dynamical mode decomposition (DMD) is applied to the outputs of a numerical simulation of Kelvin-Helmholtz turbulence in a cylindical plasma, so as to capture and quantify the time evolution of the dominant nonlinear structures. These structures comprise rotationally symmetric deformations together with spiral patterns, which…
Preprint Published