The effects of breaking waves on near-surface wind turbulence and drag coefficient are investigated using large-eddy simulation. The impact of intermittent and transient wave breaking events (over a range of scales) is modeled as localized form drag, which generates airflow separation bubbles downstream. The simulations are performed for very young sea conditions under high winds, comparable to...

Abstract Flutter is a major constraint on modern turbomachines; as the designs move toward more slender, thinner, and loaded blades, they become prone to experience high cycle fatigue problems. Dry friction, present at root attachment for cantilever configurations, one of main sources energy dissipation. It saturates flutter vibration amplitude growth, producing limit oscillation whose depends ...

Friction welding is widely used in various industries. In friction welding, heat is generated by conversion of mechanical energy into thermal energy at the interface the work pieces during pin rotation under pressure. A three-dimensional thermo mechanical simulation of friction stir welding (FSW) processes is carried out for Aluminium Alloys of 6061and 7050 where the simulation results are comp...

We present a supersymmetric model where energy scales of discrete $R$-symmetry breaking ($Z_{6R}$) and cosmic inflation are commonly attributed to the confinement scale hidden $Sp(2)$ strong dynamics. Apart from these, SUSY-breaking scale, Higgsino mass right-handed neutrino masses all shown stem $Z_{6R}$ inferred CMB observables. will show that is characterized by soft $m_{\rm soft}\simeq100-1...

The physical processes governing coastal exchange between the surf zone, inner shelf, and open ocean is critical for estimating mass its impact on ecological processes. present study combined field measurements theoretical approaches to explore hydrodynamics in boundary layer (CBL) which both bottom drag shore friction affect transport mixing Observed drifter-cluster trajectories a nearly along...

[1] Existing laboratory studies suggest that surface wave breaking may exert a significant impact on the formation and evolution of oceanic surface boundary layer, which plays an important role in the ocean‐atmosphere coupled system. However, present climate models either neglect the effects of wave breaking or treat them implicitly through some crude parameterization. Here we use a one‐dimensi...

-The concept of planetary wave breaking (MclNTYRE and PALMER, 1983; 1984) is critically reviewed. It is concluded that the wave breaking signature is not unique to any particular dynamic event in the stratosphere. Therefore, the classification of stratospheric transport events, such as 'wave breaking', groups fundamentally different events together. Better qualification of the wave breaking sig...

As waves travel and shoal towards a beach, their surface elevation becomes peaky (sharp crests) and asymmetric relative to the vertical. Within a wave period, the corresponding orbital velocity near the bottom shows a similar (time) variation and it is recognized that these nonlinearities are responsible for sediment transport. The resulting wave-induced bottom shear stresses are required for m...

In the present study, breaking focused wave groups were simulated using open−source Computational Fluid Dynamics model REEF3D in order to investigate impact on scaled (1:10) two−dimensional coastal deck structure with girder. The effect of environmental parameters, such as bottom slope and steepness geometric properties high−crested spilling breakers, was investigated. location forces acting lo...