Model reduction for flow analysis and control

CW Rowley, STM Dawson - Annual Review of Fluid Mechanics, 2017 - annualreviews.org
Advances in experimental techniques and the ever-increasing fidelity of numerical
simulations have led to an abundance of data describing fluid flows. This review discusses a …

Residual dynamic mode decomposition: robust and verified Koopmanism

MJ Colbrook, LJ Ayton, M Szőke - Journal of Fluid Mechanics, 2023 - cambridge.org
Dynamic mode decomposition (DMD) describes complex dynamic processes through a
hierarchy of simpler coherent features. DMD is regularly used to understand the …

[HTML][HTML] 动力学模态分解及其在流体力学中的应用

寇家庆, 张伟伟 - 空气动力学学报, 2018 - html.rhhz.net
随着计算流体力学和先进流动测试技术的发展, 流动的刻画越来越精细, 伴随而来的海量流场
信息的模态提取与复杂动力学特征的模型化成为当前流体力学的研究热点. 动力学模态分解 …

Study of dynamics in post-transient flows using Koopman mode decomposition

H Arbabi, I Mezić - Physical Review Fluids, 2017 - APS
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 …

Investigation of the roughness-induced transition: global stability analyses and direct numerical simulations

JC Loiseau, JC Robinet, S Cherubini… - Journal of Fluid …, 2014 - cambridge.org
The linear global instability and resulting transition to turbulence induced by an isolated
cylindrical roughness element of height) roughness element sustaining only the sinuous …

Kinetic energy and entropy preserving schemes for compressible flows by split convective forms

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 …

Oblique transition in hypersonic double-wedge flow

A Dwivedi, GS Sidharth, MR Jovanović - Journal of Fluid Mechanics, 2022 - cambridge.org
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 …

[HTML][HTML] 粗糙元对高超声速边界层转捩影响的研究进展

董昊, 刘是成, 程克明 - 实验流体力学, 2018 - pubs.cstam.org.cn
高超声速边界层转捩对高超声速飞行器气动设计具有重要影响. 转捩控制一直是转捩研究的主要
目的之一, 在高超声速情况下主要采用粗糙元进行边界层转捩控制. 回顾了近年来不同类型粗糙 …

High-order accurate kinetic-energy and entropy preserving (KEEP) schemes on curvilinear grids

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 …

Onset of three-dimensionality in supersonic flow over a slender double wedge

S Gs, A Dwivedi, GV Candler, JW Nichols - Physical Review Fluids, 2018 - APS
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 …