... Abstract Due to the nature of migration, pufferfish has excellent underwater drag reduction ability. Apart from its streamline body, some studies showed that the microstructures on its body could also contribute to the drag reduction. In this work, the effects of the microstructure...

... are in close proximity, analysing various stages during the recovery process. It lays the groundwork for further studies aimed at developing dynamic underwater docking operations. Keywords: Computational Fluid Dynamics; Autonomous Underwater Vehicle Recovering; Drag Reduction; Biomimetics 1. INTRODUCTION...

... Abstract A novel flow control method, by adding a closed flexible coating to a rigid body, has been proven a significant drag reduction in the two-dimensional flow in a soap film tunnel (Phys. Rev. Lett., vol. 125(3), 2020, pp. 034502). In the present study, we extend this method to three...

.... By reasonably optimizing the horizontal and vertical spacing of each ship, the “Sea-Train” uses the favorable wave interference between hulls to obtain drag reduction performance and increase its voyage. To investigate the resistance variation of formation “Sea-Train” with speed, transverse distance...

... relationship with sharks has been investigated, and the numerical results showed that the boundary layers and adverse pressure gradient regions around the shark can provide a significant drag reduction on the remora when it attaches to the shark. To support the feasibility study of the underwater dynamic...

... Abstract This study investigated the flow of viscoelastic fluids through horizontal pipeline mainly focusing on the effect of fluid elasticity on drag reduction and onset of transition to turbulent flow regime. In order to be able to see the sole effect of fluid elasticity (independent from...

... Abstract Flow control is an attractive topic in consideration of its significance associated with drag reduction or vibration suppression in fluid-structure interaction (FSI) system. A circular cylinder with a flexible plate in the wake region has been investigated numerically. An immersed...

... and a steady lift force appears towards the side the fairing has deflected. The fluid-dynamic mechanism is very similar to that observed for a free-to-rotate splitter plate of equivalent length. VIV suppression drag reduction short-tail fairing Proceedings of OMAE 2011 30th International Conference...

... and damping which is free to respond in the cross-flow direction. It is shown how VIV and WIV can be practically eliminated by using free to rotate parallel plates on a pair of tandem cylinders. Unlike helical strakes, the device achieves VIV suppression with 33% drag reduction when compare to a pair of fixed...

... in the cross-flow direction. It is shown how vortex-induced vibration can be practically eliminated by using free to rotate, two-dimensional control plates. Unlike helical strakes, the devices achieve VIV suppression with drag reduction. The device producing the largest drag reduction was found to have a drag...