The pressure field beneath intense surface water wave groups

Recovering the Water-wave Surface from Pressure Measurements

Talk Abstract A new method is proposed to recover the water-wave surface elevation from pressure data obtained at the bottom of the fluid. The new method requires the numerical solution of a nonlocal nonlinear equation relating the pressure and the surface elevation which is obtained from the Euler formulation of the water-wave problem without approximation. This new approach is compared with o...

Crawling Beneath the Free Surface: Water Snail Locomotion

Sungyon Lee, John W. M. Bush, A. E. Hosoi, and Eric Lauga 1 Hatsopoulos Microfluids Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 2 Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 3 Department of Mechanical and Aerospace Eng...

Looking beneath the surface.

Scaling of wave-packet dynamics in an intense midinfrared field.

A theoretical investigation is presented that examines the wavelength scaling from near-visible (0.8 micro m) to midinfrared (2 micro m) of the photoelectron distribution and high harmonics generated by a "single" atom in an intense electromagnetic field. The calculations use a numerical solution of the time-dependent Schrödinger equation (TDSE) in argon and the strong-field approximation in he...

Relating the Bottom Pressure and the Surface Elevation in the Water Wave Problem

An overview is presented of recent progress on the relation between the pressure at the bottom of the flat water bed and the elevation of the free water boundary within the context of the onedimensional, irrotational water wave problem. We present five different approaches to this problem. All are compared to (1) numerical data for Stokes waves, one-dimensional traveling wave solutions of the f...