The drag force and flow-induced noise of underwater vehicles significantly affect their
hydrodynamic and stealth performance. This paper investigates the impact of helical …

The effect of an upstream half-C shape body on the reduction of the total drag of a finite
circular cylinder is investigated experimentally. Five main cylinders, each with an upstream …

An experimental study was carried out to investigate the effect of an upstream extended
surface on the total drag of finite circular cylinders in turbulent flow. Five different diameter …

This study experimentally and numerically investigates the performance of a circular cylinder
with a spiral grooved surface in terms of reducing wind drag. Its application in the overhead …

The helical groove structure has emerged as a promising passive control technology for
drag and noise reduction, with the potential to optimize the operational efficiency of …

Numerous aerodynamic applications exist for the cylinder's surface including the casing
(body) of rockets, the main body of airplanes, the surrounding body of airplane propellers, as …

Researchers have extensively studied drag reduction because of its impact on a vehicle's
fuel economy and structural stability, among other applications. A numerical study was …

In the current work, the passive drag reduction of a circular cylinder for the subcritical
Reynolds number range of 5.67× 104 to 1.79× 105 was computationally and experimentally …

Ce travail présent l'impact de la rugosité sur le comportement hydrodynamique du fluide sur
un cylindre rainuré de forme convexe, en examinant l'influence de la forme et de l'amplitude …

This paper investigates the use of helical grooves to control flow around a cylinder. The
study focuses on the range of Reynolds numbers between 2.8× 10⁴ and 8.6× 10⁴ …