In the present review, recent progress on the vortex identification methods are introduced
with a focus on the newly proposed omega method (Ω method). The advantages of Ω …

Direct numerical simulations of compressible turbulent channel flows are performed for bulk
Mach numbers 0.8 and 1.5 and bulk Reynolds numbers in the range of 3000–34 000. The …

Transpiration cooling in a turbulent boundary layer on a flat plate is investigated using direct
numerical simulations (DNS). The simulations are performed by solving the compressible …

Vortical flow is generally considered to be a flow with a rotational trend, but vortex regions
vary depending on the vortex identification methods by which they are extracted. In this …

The similarity of turbulent structures between compressible and incompressible wall
turbulence has been well recognized through mostly visualization of instantaneous fields …

Dynamics of a trefoil knotted vortex Page 1 J. Fluid Mech. (2021), vol. 923, A19, doi:10.1017/jfm.2021.580
Dynamics of a trefoil knotted vortex Jie Yao1, Yue Yang2 and Fazle Hussain1,† 1Department …

We analyse the vortex structures of the mean turbulent flow field in a 90-degree bend pipe at
bulk Reynolds number 5300 and radius of curvature 2.5 times the pipe radius. The Reynolds …

Compressible turbulent plane Couette flows are studied via direct numerical simulation for
wall Reynolds numbers up to, the amplitude modulation of these structures on the near-wall …

Spanwise wall oscillation is an easily implemented active control scheme. It can delay the
transition to turbulent flows in incompressible boundary layers under appropriate control …

Spanwise wall oscillation has been extensively studied to explore possible drag control
methods, mechanisms and efficacy–particularly for incompressible flows. We performed …