View in EDS

The influence of grain size and channelization on mobility of volcanic granular flows: insights from laboratory experiments.

Saved in:
Bibliographic Details
Title: The influence of grain size and channelization on mobility of volcanic granular flows: insights from laboratory experiments.
Authors: Roberto, Sulpizio1,2,3 (AUTHOR) roberto.sulpizio@uniba.it, Sara, Meschiari4 (AUTHOR), Damiano, Sarocchi5,6 (AUTHOR), Francesco, Neglia1 (AUTHOR), Angel, Rodriguez-Sedano Luis5 (AUTHOR), Federico, Lucchi4 (AUTHOR), Oscar, Segura-Cisneros5 (AUTHOR), Fabio, Dioguardi1 (AUTHOR), Bernardino, Barrientos7 (AUTHOR)
Source: Bulletin of Volcanology. Dec2025, Vol. 87 Issue 12, p1-13. 13p.
Subject Terms: *Grain size, *Stream channelization, *Lava flows, *Granular flow, *Velocity measurements, *Chemistry experiments, *Volcanic ash, tuff, etc.
Abstract: Laboratory experiments on granular flows using natural material were carried out under different conditions in order to investigate the behavior of fine to coarse-grained, channelized and non-channelized granular flows passing over a break in slope. Morphometric parameters of channelized and non-channelized experiments are compared for both fine-grained and coarse-grained grain size distributions. After normalization, morphometric data provide empirical relationships that highlight the major influence of grain size vs. channelization of the experimental flows. Normalized velocity data of the flow front show third-order polynomial fit for both coarse-grained and fine-grained experiments, as well as for non-channelized and channelized ones. This highlights similar complex behavior of the different experimental flows, which differs only for different partition of inertial and frictional forces at changing grain size of experimental mixtures. The runout of coarse-grained granular flows is always longer than that of fine-grained granular flows, irrespective if they are channelized or non-channelized. Finally, we discuss the applicability of the experimental results to natural granular flows, highlighting the change in physical behavior of fine-rich pyroclastic density currents and volcaniclastic flows depending on the effectiveness of fluidization processes in fine-grained natural materials. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 190381463
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: The influence of grain size and channelization on mobility of volcanic granular flows: insights from laboratory experiments.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Roberto%2C+Sulpizio%22">Roberto, Sulpizio</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> roberto.sulpizio@uniba.it</i><br /><searchLink fieldCode="AR" term="%22Sara%2C+Meschiari%22">Sara, Meschiari</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Damiano%2C+Sarocchi%22">Damiano, Sarocchi</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Francesco%2C+Neglia%22">Francesco, Neglia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Angel%2C+Rodriguez-Sedano+Luis%22">Angel, Rodriguez-Sedano Luis</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Federico%2C+Lucchi%22">Federico, Lucchi</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oscar%2C+Segura-Cisneros%22">Oscar, Segura-Cisneros</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fabio%2C+Dioguardi%22">Fabio, Dioguardi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bernardino%2C+Barrientos%22">Bernardino, Barrientos</searchLink><relatesTo>7</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Volcanology%22">Bulletin of Volcanology</searchLink>. Dec2025, Vol. 87 Issue 12, p1-13. 13p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Grain+size%22">Grain size</searchLink><br />*<searchLink fieldCode="DE" term="%22Stream+channelization%22">Stream channelization</searchLink><br />*<searchLink fieldCode="DE" term="%22Lava+flows%22">Lava flows</searchLink><br />*<searchLink fieldCode="DE" term="%22Granular+flow%22">Granular flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Velocity+measurements%22">Velocity measurements</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemistry+experiments%22">Chemistry experiments</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanic+ash%2C+tuff%2C+etc%2E%22">Volcanic ash, tuff, etc.</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Laboratory experiments on granular flows using natural material were carried out under different conditions in order to investigate the behavior of fine to coarse-grained, channelized and non-channelized granular flows passing over a break in slope. Morphometric parameters of channelized and non-channelized experiments are compared for both fine-grained and coarse-grained grain size distributions. After normalization, morphometric data provide empirical relationships that highlight the major influence of grain size vs. channelization of the experimental flows. Normalized velocity data of the flow front show third-order polynomial fit for both coarse-grained and fine-grained experiments, as well as for non-channelized and channelized ones. This highlights similar complex behavior of the different experimental flows, which differs only for different partition of inertial and frictional forces at changing grain size of experimental mixtures. The runout of coarse-grained granular flows is always longer than that of fine-grained granular flows, irrespective if they are channelized or non-channelized. Finally, we discuss the applicability of the experimental results to natural granular flows, highlighting the change in physical behavior of fine-rich pyroclastic density currents and volcaniclastic flows depending on the effectiveness of fluidization processes in fine-grained natural materials. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=190381463
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s00445-025-01899-w
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Grain size
        Type: general
      – SubjectFull: Stream channelization
        Type: general
      – SubjectFull: Lava flows
        Type: general
      – SubjectFull: Granular flow
        Type: general
      – SubjectFull: Velocity measurements
        Type: general
      – SubjectFull: Chemistry experiments
        Type: general
      – SubjectFull: Volcanic ash, tuff, etc.
        Type: general
    Titles:
      – TitleFull: The influence of grain size and channelization on mobility of volcanic granular flows: insights from laboratory experiments.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Roberto, Sulpizio
      – PersonEntity:
          Name:
            NameFull: Sara, Meschiari
      – PersonEntity:
          Name:
            NameFull: Damiano, Sarocchi
      – PersonEntity:
          Name:
            NameFull: Francesco, Neglia
      – PersonEntity:
          Name:
            NameFull: Angel, Rodriguez-Sedano Luis
      – PersonEntity:
          Name:
            NameFull: Federico, Lucchi
      – PersonEntity:
          Name:
            NameFull: Oscar, Segura-Cisneros
      – PersonEntity:
          Name:
            NameFull: Fabio, Dioguardi
      – PersonEntity:
          Name:
            NameFull: Bernardino, Barrientos
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 02588900
          Numbering:
            – Type: volume
              Value: 87
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Bulletin of Volcanology
              Type: main
ResultId 1