Inspection of the dynamic properties of laminar separation bubbles: free-stream turbulence intensity effects for different Reynolds numbers
Sign Up to like & getrecommendations! Published in 2017 at "Experiments in Fluids"
DOI: 10.1007/s00348-017-2353-7
Abstract: The effects of free-stream turbulence intensity (FSTI) on the transition process of a pressure-induced laminar separation bubble have been studied for different Reynolds numbers (Re) by means of time-resolved (TR) PIV. Measurements have been performed… read more here.
Keywords: reynolds numbers; stream turbulence; free stream; turbulence intensity ... See more keywords
Response of a flat plate laminar separation bubble to Reynolds number, free-stream turbulence and adverse pressure gradient variation
Sign Up to like & getrecommendations! Published in 2020 at "Experiments in Fluids"
DOI: 10.1007/s00348-020-02958-y
Abstract: Abstract An extensive data set describing separated flows with different Reynolds numbers (Re), free-stream turbulence intensities (Tu) and adverse pressure gradients (APG) is used for the statistical characterization of laminar separation bubbles (LSBs). Measurements were… read more here.
Keywords: adverse pressure; flat plate; stream turbulence; free stream ... See more keywords
Influence of roughness-generated streaks on laminar separation bubbles
Sign Up to like & getrecommendations! Published in 2024 at "Experiments in Fluids"
DOI: 10.1007/s00348-024-03837-6
Abstract: This experimental investigation studies the impact of streaks on two-dimensional laminar separation bubbles forming over an aerofoil. Streaks are introduced into the boundary layer using cylindrical roughness elements, and the resulting mean and unsteady flow… read more here.
Keywords: laminar separation; turbulence; separation bubbles; roughness ... See more keywords
Instability processes in short and long laminar separation bubbles
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DOI: 10.1007/s00348-024-03847-4
Abstract: This work studies the link between the bursting process of a flat plate laminar separation bubble and the modification of the stability characteristics of the separated shear layer due to changes in the flow parameters.… read more here.
Keywords: laminar separation; long laminar; separation; separation bubbles ... See more keywords
Spanwise flow development within a laminar separation bubble under natural and forced transition
Sign Up to like & getrecommendations! Published in 2018 at "Experimental Thermal and Fluid Science"
DOI: 10.1016/j.expthermflusci.2018.02.032
Abstract: Abstract The variation of streamwise and spanwise characteristic wavelengths of a NACA 0018 laminar separation bubble under natural and periodic excitation conditions is investigated experimentally. Periodic forcing is applied with an AC-DBD plasma actuator, and… read more here.
Keywords: separation bubble; bubble natural; excitation; spanwise ... See more keywords
Response of a laminar separation bubble to impulsive forcing
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.217
Abstract: The spatial and temporal response characteristics of a laminar separation bubble to impulsive forcing are investigated by means of time-resolved particle image velocimetry and linear stability theory. A two-dimensional impulsive disturbance is introduced with an… read more here.
Keywords: bubble impulsive; impulsive forcing; separation bubble; separation ... See more keywords
Laminar separation bubble formation and bursting on a finite wing
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.321
Abstract: Abstract The transient processes of laminar separation bubble (LSB) formation and bursting on a rectangular NACA 0018 wing are studied experimentally. A two-dimensional airfoil model is used as a baseline for the assessment of finite… read more here.
Keywords: laminar separation; separation bubble; lift; bubble formation ... See more keywords
Low-frequency unsteadiness in laminar separation bubbles
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.962
Abstract: Abstract Low-frequency phenomena in an incompressible pressure-induced laminar separation bubble (LSB) on a flat plate is investigated using direct numerical simulation. The LSB configuration of Spalart and Strelets (J. Fluid Mech., vol. 403, 2000, pp.… read more here.
Keywords: laminar separation; streaky structures; low frequency; frequency unsteadiness ... See more keywords
Large eddy simulation of the effect of blade rotation on laminar separation bubbles in horizontal axis wind turbines
Sign Up to like & getrecommendations! Published in 2025 at "Physics of Fluids"
DOI: 10.1063/5.0261925
Abstract: The formation and evolution of laminar separation bubbles on a horizontal axis wind turbine blade in the transitional flow regime are investigated using Large Eddy Simulations. Both rotating and translating cases of a blade element,… read more here.
Keywords: wind; laminar separation; wind turbines; axis wind ... See more keywords
The effect of streaks on the breakup of Kelvin–Helmholtz rolls in a geometry-induced laminar separation bubble
Sign Up to like & getrecommendations! Published in 2025 at "Physics of Fluids"
DOI: 10.1063/5.0274917
Abstract: This study investigates the influence of boundary layer streaks on the transition process of a geometry-induced laminar separation bubble (LSB). High-fidelity numerical simulations of the T3L test case, proposed by the European Research Community on… read more here.
Keywords: layer; laminar separation; geometry induced; boundary layer ... See more keywords
Laminar separation bubble analysis by means of single–shot lifetime temperature sensitive paint in a water towing tank
Sign Up to like & getrecommendations! Published in 2024 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/ad3a85
Abstract: A laminar separation bubble is studied on an SD7003 foil in a water towing tank at a Reynolds number of 6⋅104 and an angle of attack of 6∘ by means of the temperature sensitive paint… read more here.
Keywords: laminar separation; single shot; separation bubble; shot lifetime ... See more keywords