Visualization of dominant stress-transfer mechanisms in experimental debris flows of different particle-size distribution
Why is this work in the frame?
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
The three-model screen
all 1,000 screened works →All three models called this out of scope.
Physical modeling of stress transfer in experimental debris flows.
This experimentally studies stress transfer mechanisms in debris flows, not research practice.
Physical modelling of debris-flow stress transfer; geotechnical domain science.
Abstract
Physical modelling of debris flow in a small-scale flume has been carried out to investigate the internal stress-transfer mechanisms within unsteady, saturated, and segregating granular free-surface flows. Measurements of the internal velocity fields within model flows were obtained via planar laser–induced fluorescence and particle image velocimetry. Normalized velocity profiles taken at a section over the flow duration were found to essentially collapse onto a single curve, the shape of which was dependent on the particle-size distribution. While all flows exhibited internal basal slip and shear, for tests on well-graded materials that are most representative of debris flows, the shear rate was found to reduce towards the surface to near-zero, exhibiting near plug-flow. Dimensional analysis shows that particles of different size within these flows experienced different dominant stress-transfer mechanisms — frictional, collisional or viscous. Rapid grain-size segregation therefore is both due to and results in different modes of stress transfer within a single flow. This means that in a segregating and hence, stratified system, different flow regimes will act concurrently at microscale and mesoscale. Results highlight the complexity of debris flows, so that it may be undesirable to ascribe a single microscale constitutive behaviour throughout, and further calls into question the concept of flow regimes for debris flows based on bulk measurements.
Stored with the screening record, where it is evidence for the labels above.
The record
- Venue
- Canadian Geotechnical Journal
- Topic
- Landslides and related hazards
- Field
- Environmental Science
- Canadian institutions
- —
- Funders
- Engineering and Physical Sciences Research Council
- Keywords
- Microscale chemistryMechanicsFlumeDebris flowParticle image velocimetryGeotechnical engineeringMesoscale meteorologyMaterials scienceDebrisGeologyShear stressFlow (mathematics)PhysicsMathematics
- Has abstract in OpenAlex
- yes