Application of a New Rheological Model to Rock Avalanches: An SPH Approach

2016 ◽  
Vol 49 (6) ◽  
pp. 2353-2372 ◽  
Author(s):  
D. Manzanal ◽  
V. Drempetic ◽  
B. Haddad ◽  
M. Pastor ◽  
M. Martin Stickle ◽  
...  
Keyword(s):  
Rheological Model ◽  
Rock Avalanches

scholarly journals Stress level effect on mobility of dry granular flows of angular rock fragments

Landslides ◽  
2021 ◽  
Author(s):  
B. Cagnoli
Keyword(s):  
Stress Level ◽  
Granular Flow ◽  
High Stress ◽  
Granular Flows ◽  
Flow Dynamics ◽  
Small Scale ◽  
Flow Volume ◽  
Rock Fragments ◽  
Rock Avalanches ◽  
Flow Mobility

AbstractGranular flows of angular rock fragments such as rock avalanches and dense pyroclastic flows are simulated numerically by means of the discrete element method. Since large-scale flows generate stresses that are larger than those generated by small-scale flows, the purpose of these simulations is to understand the effect that the stress level has on flow mobility. The results show that granular flows that slide en mass have a flow mobility that is not influenced by the stress level. On the contrary, the stress level governs flow mobility when granular flow dynamics is affected by clast agitation and collisions. This second case occurs on a relatively rougher subsurface where an increase of the stress level causes an increase of flow mobility. The results show also that as the stress level increases, the effect that an increase of flow volume has on flow mobility switches sign from causing a decrease of mobility at low stress level to causing an increase of mobility at high stress level. This latter volume effect corresponds to the famous Heim’s mobility increase with the increase of the volume of large rock avalanches detected so far only in the field and for this reason considered inexplicable without resorting to extraordinary mechanisms. Granular flow dynamics is described in terms of dimensionless scaling parameters in three different granular flow regimes. This paper illustrates for each regime the functional relationship of flow mobility with stress level, flow volume, grain size, channel width, and basal friction.

scholarly journals A simple approach for adding thixotropy to an elasto-visco-plastic rheological model to facilitate structural interrogation of human blood

2021 ◽  
Vol 290 ◽  
pp. 104503
Author(s):  
Matthew Armstrong ◽  
Mathias Scully ◽  
Michael Clark ◽  
Trevor Corrigan ◽  
Corey James
Keyword(s):  
Human Blood ◽  
Rheological Model ◽  
Simple Approach

scholarly journals A new rheological model and its application in mountain tunnelling

2008 ◽  
Vol 23 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Zhenchang Guan ◽  
Yujing Jiang ◽  
Yoshihiko Tanabashi ◽  
Hongwei Huang
Keyword(s):  
Rheological Model

scholarly journals A rheological model for immersed corrugated elastic plates

Ultrasonics ◽  
2017 ◽  
Vol 75 ◽  
pp. 115-123
Author(s):  
D. Meier ◽  
H. Franklin ◽  
M.V. Predoi ◽  
M. Rousseau ◽  
J.L. Izbicki
Keyword(s):  
Rheological Model ◽  
Elastic Plates

Shear flow of a heterophase liquid interlayer and its structural-rheological model

2011 ◽  
Vol 56 (8) ◽  
pp. 1100-1105 ◽  
Author(s):  
B. A. Altoiz ◽  
S. K. Aslanov ◽  
S. V. Kiriyan
Keyword(s):  
Shear Flow ◽  
Rheological Model ◽  
Liquid Interlayer

Discrete modelling of rock avalanches: sensitivity to block and slope geometries

2015 ◽  
Vol 17 (5) ◽  
pp. 645-666 ◽  
Author(s):  
Guilhem Mollon ◽  
Vincent Richefeu ◽  
Pascal Villard ◽  
Dominique Daudon
Keyword(s):  
Rock Avalanches ◽  
Discrete Modelling
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