SPH-based numerical investigation of mudflow and other complex fluid flow interactions with structures

• Published in: Computational geosciences Vol. 11; no. 4; pp. 297 - 306
• Main Authors: Laigle, Dominique, Lachamp, Philippe, Naaim, Mohamed
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.12.2007; Springer Verlag
• Subjects: Debris flow; Environmental Sciences; Fluid flow; Free surfaces; Hydrodynamics; Mathematical models; Mudflows; Studies; MUDFLOW; DYNAMIC IMPACT; PROTECTION STRUCTURES; DEBRIS FLOW; SIMULATION MODEL
• ISSN: 1420-0597; 1573-1499
• DOI: 10.1007/s10596-007-9053-y

The understanding of mudflow-structure interactions and debris-flow structure interactions is of paramount importance for the rational design of technical countermeasures. However, to date, only a limited number of studies have investigated this subject. We propose here a numerical approach to this topic using a 2D vertical numerical model based on the smoothed particle hydrodynamics (SPH) method. First, we will test the capacity of the model to simulate unsteady free-surface flows of water and viscoplastic fluid in comparison to laboratory experiments. Then, we will use it prospectively, based on a series of simulations of Bingham fluid free-surface propagations, to determine the momentum reduction resulting from the presence of a simple obstacle perpendicular to the direction of propagation and to determine the characteristics of stresses applied to this obstacle in terms of peak pressure and evolution over time.[PUBLICATION ABSTRACT]