Dynamic mode decomposition (DMD) describes complex dynamic processes through a hierarchy of simpler coherent features. DMD is regularly used to understand the …
The Koopman mode decomposition (KMD) is a data-analysis technique which is often used to extract the spatiotemporal patterns of complex flows. In this paper, we use KMD to study …
The linear global instability and resulting transition to turbulence induced by an isolated cylindrical roughness element of height) roughness element sustaining only the sinuous …
Y Kuya, K Totani, S Kawai - Journal of Computational Physics, 2018 - Elsevier
This study proposes a kinetic energy and entropy preserving scheme to achieve stable and non-dissipative compressible flow simulations. The proposed scheme is built in such a way …
We utilize resolvent and weakly nonlinear analyses in combination with direct numerical simulations (DNS) to identify mechanisms for oblique transition in a Mach hypersonic flow …
Y Kuya, S Kawai - Journal of Computational Physics, 2021 - Elsevier
High-order accurate kinetic energy and entropy preserving (KEEP) schemes in generalized curvilinear coordinates are proposed for stable and non-dissipative numerical simulations …
We investigate the onset of three-dimensionality in a Mach 5 slender-double-wedge flow as the turn angle at the compression corner increases. Beyond a critical angle, the two …