The linear global instability and resulting transition to turbulence induced by an isolated
cylindrical roughness element of height) roughness element sustaining only the sinuous …

Large-eddy simulation (LES) and dynamic mode decomposition (DMD) are used to study an
underexpanded sonic jet injected into a supersonic crossflow and an overexpanded …

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 …

We study the transition of a Mach 6 laminar boundary layer due to an isolated cylindrical
roughness element using large-scale direct numerical simulations (DNS). Three flow …

Global stability analysis and direct numerical simulation of boundary layers with an isolated
roughness element Page 1 J. Fluid Mech. (2022), vol. 949, A12, doi:10.1017/jfm.2022.749 Global …

Transverse rectangular microgrooves with local machining flaw are investigated using direct
numerical simulations from the viewpoint of suppressing the second-mode instability in a …

We study and compare instability mechanisms of a Mach 5.65 laminar boundary layer
tripped by an isolated diamond-shaped trip and by an array of diamond-shaped trips using …

Boundary layer transition over isolated roughness elements is investigated in the
incompressible flow regime using tomographic PIV. Four different geometries (cylinder …

Surface roughness elements are often used to force laminar to turbulent transition in
aerodynamic and aeroacoustic wind-tunnel experiments. The statistical features and …

This paper explores the mechanisms underlying roughness induced transition (RIT) caused
by discrete roughness elements (DREs) using immersed boundary direct numerical …