@article{fdi:010079591,
  title = {{I}mpact of fluidized granular flows into water : implications for tsunamis generated by pyroclastic flows},
  author = {{B}ougouin, {A}lexis and {P}aris, {R}. and {R}oche, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{N}ovel laboratory experiments of fluidized granular flows entering water are reported, for the purpose of investigating tsunamis generated by pyroclastic flows. {Q}ualitatively, the impact of a fluidized granular flow into water leads to (i) an initial vertical granular jet over water, (ii) a leading and largest wave, and (iii) a turbulent mixing zone forming a turbidity current. {T}he present study focuses on the leading wave features in the near-field region, as a function of the mass flux per width q(m) and the volume per width nu of the flow, the maximum water depth {H}-o, and the slope angle theta of the inclined plane. {T}he obtained waves are of {S}tokes and cnoidal types, for which the generation is mostly controlled by q(m) and nu. {B}y contrast, {H}-o plays no role on the wave generation that occurs in the shallowest region. {M}oreover, a comparison between fluidized granular, dry (nonfluidized) granular, and water flows entering water is addressed under similar flow conditions. {T}he dimensionless amplitude scales as {A}/{H}-o = f(zeta), where zeta = {F}r{SM} sin theta is a dimensionless parameter depending on the {F}roude number {F}r, the relative slide thickness {S}, the relative mass {M}, and the slope angle theta. {D}ata of fine fluidized granular, fine dry granular, and water flows collapse on a master curve, which implies that the nature of the flowing material is of lesser importance in the current setup. {B}y contrast, coarse granular flows generate lower amplitude waves, which is attributed to the penetration of water into the porous granular medium.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {125},
  numero = {5},
  pages = {e2019{JB}018954 [17 ]},
  ISSN = {2169-9313},
  year = {2020},
  DOI = {10.1029/2019jb018954},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079591},
}