Insights On The Application Of Some Current
SPH Approaches For The Study Of Muddy Debris
Flow: Numerical And Experimental Comparison
Author(s)
A. Pasculli, L. Minatti, C. Audisio & N. Sciarra
Abstract
The modeling of debris flow poses serious numerical problems, particularly with
regard to the significant distortions of the numerical grid, as it is usually applied
in both Eulerian and Lagrangian mesh based approaches. In alternative, meshless
type techniques have been proposed by different authors. Among others,
SPH (Smoothed Particle Hydrodynamics) is a purely mesh-free Lagrangian
method well suitable for computing highly transitory free surface flows of
complex fluids in complex geometries. However, a drawback of SPH method is
the modelling of the interaction between the fluid and the solid boundaries, for
which different approaches have been proposed. Accordingly, we developed a
2D SPH research numerical model, also in order to both implement different
kind of SPH algorithms and perform sensitivity analysis based on experimental
test outcomes, as already discussed previously. Hence the content of this paper is
aimed at discussing further insights, in particular, about how much the numerical
variability of the parameters requested to apply the selected Herschel-Bulkley
non Newtonian constitutive rheological equations, describing a viscoplastic
material like mudflows, affect the numerical results. Moreover further
comparisons among numerical results are given and discussed.
Keywords: SPH, 2D numerical modeling, parametric studies, muddy debris flow.
Keywords
SPH, 2D numerical modeling, parametric studies, muddy debris flow.
Related Book
Other papers in this volume
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