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A Fully Lagrangian Model Using DEM-WCMPS to Simulate Solid Objects in Free-surface Flow With Applications to River Ice Dynamics

Andréa Mellado Cusicahua

Masters thesis (2021)

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Cite this document: Mellado Cusicahua, A. (2021). A Fully Lagrangian Model Using DEM-WCMPS to Simulate Solid Objects in Free-surface Flow With Applications to River Ice Dynamics (Masters thesis, Polytechnique Montréal). Retrieved from https://publications.polymtl.ca/6598/
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Abstract

«RÉSUMÉ: Les processus des glaces fluviales, tels que la rupture, le transport, le blocage et le dégagement des parcelles de glace, jouent un rôle de restriction dans les processus hydrodynamiques, morphodynamiques et de transport dans les rivières des régions froides. Par exemple, les embâcles de glace, qui se forme lorsqu’il y a une accumulation de frasil ou de glace fragmentée, bloquent l’écoulement de la rivière et peuvent occasionner des inondations, un des plus grands dangers liés aux glaces fluviales. Les embâcles de glace peuvent endommager les résidences et les infrastructures ainsi qu’engendrer des risques pour les populations riveraines, tels que le délogement et même la perte de vie. Afin de réduire ces risques et conséquences, la dynamique des embâcles fluviaux a besoin d’être comprise et prédite. De nos jours, à cause du changement climatique, il est encore plus important de se fier à des outils de prédiction à haute précision afin d’atténuer les impacts des inondations causées par les embâcles de glace. À cause de la complexité de l’interaction entre l’eau et la glace présente dans les embâcles fluviaux, ce phénomène est resté largement imprévisible.» et «----------ABSTRACT: River ice dynamic processes, such as the break-up, transport, jamming, and release of ice parcels, play a curtail role in hydrodynamic, morphodynamic, and transport processes in cold region rivers. For instance, ice jams, caused by an accumulation of frazil or fragmented ice, restrict flow and can trigger ice jam floods, one of the greatest river ice hazards. Ice jam can damage properties and infrastructures as well as cause inconveniences to people, such as dislocation or even loss of life. In order to mitigate these consequences, the dynamic of river ice jams needs to be understood and predicted. Due to the complexities involved in the multiphase ice-water system, this phenomenon has remained largely unpredictable. This thesis’s main objective is to give more insight into this phenomenon by providing benchmark cases mimicking the characteristics of a jam release and developing a numerical model capable of reproducing the complex dynamic behavior of solid (ice) and fluid (water) interactions. Small-scale and challenging experiments were carried out at the Hydraulic Laboratory of École Polytechnique of Montreal. Dam-break flows were reproduced over dry and wet beds with floating block floes (representing the ice) to provide useful and comprehensive quality data for the validation of ice jam models.«

Open Access document in PolyPublie
Department: Département des génies civil, géologique et des mines
Academic/Research Directors: Ahmad Shakibaeinia
Date Deposited: 19 Oct 2021 08:06
Last Modified: 19 Oct 2021 08:06
PolyPublie URL: https://publications.polymtl.ca/6598/

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