Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.18464 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913246719508480 |
|---|---|
| author | Simonis, Ashleigh Pan, Yulin |
| author_facet | Simonis, Ashleigh Pan, Yulin |
| contents | It is well known that wave collapses can emerge from the focusing one-dimensional (1-D) Majda-McLaughlin-Tabak (MMT) model as a result of modulational instability. However, how these wave collapses affect the spectral properties and statistics of the wave field has not been adequately studied. We undertake this task by simulating the forced-dissipated 1-D MMT model over a range of forcing amplitudes. Our results show that when the forcing is weak, the spectrum agrees well with the prediction by wave turbulence theory with few collapses in the field. As the forcing strength increases, we see an increase in the occurrence of collapses, together with a transition from a power-law spectrum to an exponentially decaying spectrum. Through a spectral decomposition, we find that the exponential spectrum is dominated by the wave collapse component in the non-integrable MMT model, which is in analogy to a soliton gas in integrable turbulence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18464 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Transition from weak turbulence to collapse turbulence regimes in MMT model Simonis, Ashleigh Pan, Yulin Pattern Formation and Solitons It is well known that wave collapses can emerge from the focusing one-dimensional (1-D) Majda-McLaughlin-Tabak (MMT) model as a result of modulational instability. However, how these wave collapses affect the spectral properties and statistics of the wave field has not been adequately studied. We undertake this task by simulating the forced-dissipated 1-D MMT model over a range of forcing amplitudes. Our results show that when the forcing is weak, the spectrum agrees well with the prediction by wave turbulence theory with few collapses in the field. As the forcing strength increases, we see an increase in the occurrence of collapses, together with a transition from a power-law spectrum to an exponentially decaying spectrum. Through a spectral decomposition, we find that the exponential spectrum is dominated by the wave collapse component in the non-integrable MMT model, which is in analogy to a soliton gas in integrable turbulence. |
| title | Transition from weak turbulence to collapse turbulence regimes in MMT model |
| topic | Pattern Formation and Solitons |
| url | https://arxiv.org/abs/2402.18464 |