Oct 11, 2004 · Active control of flow over a sphere at $\hbox {\it Re}\, {=}\,10^5$, based on the free-stream velocity $U_ {\infty}$ and sphere diameter $d$, is carried out for drag reduction using a time-periodic blowing and suction from a slit on the sphere surface.

May 14, 2024 · In this study, a smart surface-morphing technique is devised that can adjust dimple depth based on the flow conditions to minimize drag across a wide range of $Re$ values. By depressurizing the core of a rigid skeleton enclosed with a thin latex membrane, the dimple depth can be precisely controlled in response to flow velocity changes.

simple surface morphing approach for drag reduction on a sphere, enabling precise control of dimple depth according to flow velocity. Utilizing this morphable sphere, we systematically investigate the impact of dimple depth ratio (k/d) on aerodynamic drag performance and flow characteristics. Although, several prior studies have stud-

A highly resolved computation of the flow past a sphere at Reynolds number Re¼3700 using a finite element method (FEM)-based residual-based variational multiscale (RBVMS) formulation is performed.

May 14, 2024 · In this study, a smart surface-morphing technique is devised that can adjust dimple depth based on the flow conditions to minimize drag across a wide range of $Re$ values. By depressurizing the...

Sep 1, 2019 · In this study, a passive flow control method via a jet flow has been applied on the flow around a sphere, which is immersed in a boundary layer flow. The jet flow has been generated passively via a hole drilled from forward stagnation point to the rear of the sphere.

In this study, we overcome these challenges and introduce a straightforward and simple surface morphing approach for drag reduction on a sphere, enabling precise control of dimple depth according to flow velocity.

Jul 27, 2022 · This research work presents an experimental study's outcomes to reveal the impact of an O-ring on the flow control over a sphere placed in a turbulent boundary layer. The investigation is...

Apr 1, 2010 · In this study, we control unsteady motion in the wake behind a sphere using a suboptimal feedback control method based on the sensing of surface pressure. The cost function to be reduced is the square of the difference between the …

Jan 17, 2019 · This research work presents an experimental study's outcomes to reveal the impact of an O-ring on the flow control over a sphere placed in a turbulent boundary layer.