Home
For authors
Submission status

Current
Archive (English)
Archive
   Volumes 81-92
   Volumes 41-60
   Volumes 21-40
   Volumes 1-20
   Volumes 61-80
      Volume 80
      Volume 79
      Volume 78
      Volume 77
      Volume 76
      Volume 75
      Volume 74
      Volume 73
      Volume 72
      Volume 71
      Volume 70
      Volume 69
      Volume 68
      Volume 67
      Volume 66
      Volume 65
      Volume 64
      Volume 63
      Volume 62
      Volume 61
Search
VOLUME 73 (2001) | ISSUE 4 | PAGE 190
Focusing of nonlinear wave groups in deep water
PACS: 47.35.+i, 92.10.Hm, 92.60.Dj
Abstract
The freak wave phenomenon in the ocean is explained by the nonlinear dynamics of phase modulated wave trains. It is shown that the preliminary quadratic phase modulation of wave packets leads to the significant amplification of the "usual" modulation (Benjamin-Feir) instability. Physically, the phase modulation of water waves may be due to a variable wind in storm areas. The well-known breather solutions of the cubic Schrodinger equation appear on the final stage of the nonlinear dynamics of the wave packets, when the phase modulation becomes more uniform.