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On the effects of soil properties on leak noise propagation in plastic water distribution pipes
(2018-08-04)
In many countries, leaks are located in water distribution pipes by using the cross-correlation of pipe vibration measured either side of a suspected leak. However, in modern plastic pipes this can be problematic due to ...
Revisiting the anisotropy of metamaterials for water waves
(American Physical Society, 2017-10)
We establish, both theoretically and experimentally, that metamaterials for water waves reach a much higher degree of anisotropy than the one predicted using the analogy between water waves and their electromagnetic or ...
Sediment entrainment under fully developed waves as a function of water depth, boundary layer thickness, bottom slope and roughness
(ELSEVIER, 2010)
Many sediment entrainment equations for oscillatory waves are based on the linear (Airy) theory for deep
water, but at the depth where such waves begin to transport sediments they commonly have trochoidal or
cnoidal ...
The kinematics and stability of solitary and cnoidal wave solutions of the Serre equations
(ELSEVIER, 2011)
The Serre equations are a pair of strongly nonlinear, weakly dispersive, Boussinesq-type partial differential equations. They model the evolution of the surface elevation and the depth-averaged horizontal velocity of an ...
Ultrasonic sensor for the presence of oily contaminants in water
(UNIV NAC COLOMBIA, FAC NAC MINASMEDELLIN, 2012)
The determination of the complex reflection coefficient of ultrasonic shear-waves at the solid-liquid interface is a technique employed for the measurement of the viscoelastic properties of liquids. An interesting property ...
Recent advances in Serre-Green Naghdi modelling for wave transformation, breaking and runup processes
(ELSEVIER, 2011)
To describe the strongly nonlinear dynamics of waves propagating in the final stages of shoaling and in the surf and swash zones, fully nonlinear models are required. The ability of the Serre or Green Naghdi (S-GN) equations ...
Surface waves propagating on a turbulent flow
(AMER INST PHYSICS, 2016)
We study the propagation of monochromatic surface waves on a turbulent flow of liquid metal, when
the waves are much less energetic than the background flow. Electromagnetic forcing drives quasitwo-
dimensional turbulence ...
Theory of small aspect ratio waves in deep water
(Elsevier B.V., 2014)
The modulational instability in deep water under the action of wind and dissipation
(Cambridge University Press, 2010-12-01)
The modulational instability of gravity wave trains on the surface of water acted upon by wind and under influence of viscosity is considered. The wind regime is that of validity of Miles' theory and the viscosity is small. ...