From streaks to spots and on to turbulence: exploring the dynamics of boundary layer transition
TA Zaki - Flow, turbulence and combustion, 2013 - Springer
an eerie type of chaos can lurk just behind a facade of order, and yet deep inside the chaos
lurks an even eerier type of order.” Douglas Hofstadter Bypass transition to turbulence in …
lurks an even eerier type of order.” Douglas Hofstadter Bypass transition to turbulence in …
Effect of surface roughness and blade material on the performance of a stationary Savonius wind turbine under different operating conditions
The Savonius wind turbine is a vertical-axis wind turbine invented in 1930s consisting of a
cylindrical drum with semi-circular blades attached to the drum. It is popular for its simple …
cylindrical drum with semi-circular blades attached to the drum. It is popular for its simple …
Conditional sampling of transitional boundary layers in pressure gradients
Statistical analysis of transitional boundary layers in pressure gradients is performed using
the flow fields from direct numerical simulations of bypass transition. Laminar–turbulent …
the flow fields from direct numerical simulations of bypass transition. Laminar–turbulent …
Streak instabilities in boundary layers beneath free-stream turbulence
MJP Hack, TA Zaki - Journal of fluid mechanics, 2014 - cambridge.org
The secondary instability of boundary layer streaks is investigated by means of direct
stability analysis. The base flow is computed in direct simulations of bypass transition. The …
stability analysis. The base flow is computed in direct simulations of bypass transition. The …
Görtler instability and transition in compressible flows
We present a discussion on theoretical, experimental, and computational research studies
on Görtler instability and the related transition to turbulence occurring in compressible …
on Görtler instability and the related transition to turbulence occurring in compressible …
Secondary instabilities of Görtler vortices in high-speed boundary layer flows
Görtler vortices developed in laminar boundary layer experience remarkable changes when
the flow is subjected to compressibility effects. In the present study, five. The subharmonic …
the flow is subjected to compressibility effects. In the present study, five. The subharmonic …
Hypersonic boundary layer transition on a concave wall: stationary Görtler vortices
X Chen, GL Huang, CB Lee - Journal of Fluid Mechanics, 2019 - cambridge.org
This study investigates the stability and transition of Görtler vortices in a hypersonic
boundary layer using linear stability theory and direct numerical simulations. In the …
boundary layer using linear stability theory and direct numerical simulations. In the …
Wall temperature effects on shock wave/turbulent boundary layer interaction via direct numerical simulation
Shockwave/turbulent boundary layer interaction on flat plate are investigated by using direct
numerical simulation at different wall temperature of T w/T r= 0.5, 1.0, 2.0 respectively …
numerical simulation at different wall temperature of T w/T r= 0.5, 1.0, 2.0 respectively …
Hypersonic boundary layer transition on a concave wall induced by low-frequency blowing and suction
X Chen, J Chen, X Yuan - Physics of Fluids, 2022 - pubs.aip.org
Hypersonic boundary layer transitions caused by unsteady blowing and suction are
investigated with linear stability analyses and direct numerical simulations (DNS). Three …
investigated with linear stability analyses and direct numerical simulations (DNS). Three …
Direct Numerical Simulation of flow instabilities over Savonius style wind turbine blades
Abstract In this paper, Direct Numerical Simulations (DNS) are carried out in order to capture
the flow instabilities and transition to turbulence occurring on a Savonius style wind turbine …
the flow instabilities and transition to turbulence occurring on a Savonius style wind turbine …