Mechanics of bluff body drag reduction during transient near-wake reversals

Y Haffner, J Borée, A Spohn… - Journal of Fluid …, 2020 - cambridge.org
A combination of passive and active methods is used to manipulate the symmetry of the
turbulent wake of an Ahmed body. Dedicated experiments to study the wake reversals …

Passive control of base pressure: a review

A Khan, P Rajendran, JSS Sidhu - Applied Sciences, 2021 - mdpi.com
In the present world, passive control finds application in various areas like flow over blunt
projectiles, missiles, supersonic parallel diffusers (for cruise correction), the engine of jets …

Experimental analysis of the effect of local base blowing on three-dimensional wake modes

M Lorite-Díez, JI Jiménez-González… - Journal of Fluid …, 2020 - cambridge.org
Wake modes of a three-dimensional blunt-based body near a wall are investigated at a
Reynolds number states in the horizontal (respectively vertical) direction, while bistable …

Separation control and drag reduction for boat-tailed axisymmetric bodies through contoured transverse grooves

A Mariotti, G Buresti, G Gaggini… - Journal of Fluid …, 2017 - cambridge.org
We describe the results of a numerical and experimental investigation aimed at assessing
the performance of a control method to delay boundary layer separation consisting of the …

Flow around a diamond-section cylinder at low Reynolds numbers

PK Yadav, K Sourav, D Kumar, S Sen - Physics of Fluids, 2021 - pubs.aip.org
The steady separated flow past a diamond cylinder at low Reynolds numbers, Re, is
associated with diverse separation topologies not resolved for a circular or square cylinder …

Unsteady Coanda effect and drag reduction for a turbulent wake

Y Haffner, J Borée, A Spohn… - Journal of Fluid …, 2020 - cambridge.org
We experimentally study the unsteady forcing of the turbulent wake of a three-dimensional
blunt body for drag reduction purposes. The forcing is provided by pulsed jets coupled to …

A numerical investigation on capturing the maximum transverse amplitude in vortex induced vibration for low mass ratio

Z Kang, W Ni, L Sun - Marine structures, 2017 - Elsevier
Abstract According to Jauvtis and Williamson's experiment, when the mass ratio is 2.6, the
maximum transverse amplitude of the cylinder reaches 1.5 D in the super-upper branch …

Impact of the lateral mean recirculation characteristics on the near-wake and bulk quantities of the BARC configuration

G Lunghi, E Pasqualetto, B Rocchio, A Mariotti… - Wind and …, 2022 - koreascience.kr
The high-Reynolds number flow around a rectangular cylinder, having streamwise to
crossflow length ratio equal to 5 is analyzed in the present paper. The flow is characterized …

Axisymmetric bodies with fixed and free separation: Base-pressure and near-wake fluctuations

A Mariotti - Journal of Wind Engineering and Industrial …, 2018 - Elsevier
The fluctuations of the base pressure and of the near-wake velocity are experimentally
characterized for a constant-diameter axisymmetric blunt-based body with different …

Separation delay through contoured transverse grooves on a 2D boat-tailed bluff body: Effects on drag reduction and wake flow features

A Mariotti, G Buresti, MV Salvetti - European Journal of Mechanics-B/Fluids, 2019 - Elsevier
The effectiveness of properly contoured transverse grooves in delaying the flow separation
occurring on a two-dimensional boat-tailed bluff body is assessed through numerical …