新型波动的产生

We present the results of a combined experimental and numerical study of the
generation of internal waves using the novel internal wave generator design of
Gostiaux et al. (Exp. Fluids, vol. 42, 2007, pp. 123130). This mechanism, which
involves a tunable source composed of oscillating plates, has so far been used for a
few fundamental studies of internal waves, but its full potential is yet to be realized.
Our study reveals that this approach is capable of producing a wide variety of twodimensional
wave fields, including plane waves, wave beams and discrete vertical
modes in finite-depth stratifications. The effects of discretization by a finite number
of plates, forcing amplitude and angle of propagation are investigated, and it is found
that the method is remarkably efficient at generating a complete wave field despite
forcing only one velocity component in a controllable manner. We furthermore find
that the nature of the radiated wave field is well predicted using Fourier transforms
of the spatial structure of the wave generator. 德国LaVision PIV/PLIF粒子成像测速场仪