Much effort has been undertaken for the estimation of propulsive force of swimmers in the front crawl. Estimation is typically based on steady flow theory: the so-called quasi-steady analysis. Flow fields around a swimmer, however, are extremely unsteady because the change direction of hand produces unsteady vortex motions. To evaluate the force correctly, it is necessary to know the unsteady p...

This paper describes dynamic self-assembly of millimeter-sized objects rotating at two parallel fluid interfaces and interacting with one another hydrodynamically, both in the plane of the interface and between the interfaces. The nature of hydrodynamic interactions between the objects rotating on different interfaces and, consequently, the morphologies of the ordered structures that self-assem...

The vortex dynamics of leading-edge vortices on plunging high-aspect-ratio ( AR = 10) wings and airfoils were investigated by means volumetric velocity measurements, numerical simulations stability analysis to understand the deformation filament spanwise instabilities. filaments both wing airfoil exhibit waves, but with different origins. presence a wing-tip causes leg remain attached upper sur...

Flow distortion over a forested hill is asymmetric, forming a recirculation region on the lee slope that increases the complexity in understanding atmosphere– biosphere interaction. To understand the complexity, we examine the effect of the geometry of forested hills on recirculation formation, structure, and related CO2 transport by performing numerical simulations over doubleforested hills. T...

Due to the presence of corner eddies that change in number and pattern, the classical one-sided lid-driven cavity problem has been found to be particularly suitable to study various aspects of the performance of solution algorithms for incompressible viscous flows. More recently, the flow induced by the motion of two facing walls (two-sided lid-driven cavity) has also been investigated by Kuhlm...

Nowadays, there are numerous new features available in CFD (computational fluid dynamics) that can simulate complex physical phenomena, which used to be challenging address. However, current software, certain problems simulated using different approaches. In our article, we chose rotating motion methods analyze a counter-rotating dual-rotor wind turbine (CO-DRWT). Using the approaches selected ...

We consider the vortex state solution for a rotating cloud of trapped, Bose Einstein condensed alkali atoms and study finite temperature effects. We find that thermally excited vortex waves can distort the vortex state significantly, even at the very low temperatures relevant to the experiments. PACS numbers 0.35 Fi, 5.30 Jp, 32.80 Pj

Abstract. Redirecting the wake from an upstream wind turbine by yawing its rotor can reduce negative impact of on a downstream turbine. The present research investigated behaviour for three yaw angles [-30,0,30∘] at different inflow turbulence levels and shear profiles under controlled conditions. Experiments were conducted using model with 0.6 m diameter (D) in large tunnel. A short-range lida...

Due to the background in the mixed compression engine inlets, the Shock wave/ Turbulent Boundary Layer Interaction (STBLI) problem has been one of the concerns of the aerodynamic industry. Shock-induced separation and the corresponding interaction make the flow losing its quality and reduce inlet total pressure recovery. Various flow-control methods have been tried and investigated by lots of r...