Modeling and simulation of particle agglomeration in turbulent flows using a hard-sphere model with deterministic collision detection and enhanced structure models
作者： M. Breuer , N. Almohammed
DOI: 10.1016/J.IJMULTIPHASEFLOW.2015.03.018
关键词: Angular momentum 、 Statistical physics 、 Turbulence 、 Economies of agglomeration 、 Large eddy simulation 、 Conservation of mass 、 Collision 、 Physics 、 Modeling and simulation 、 Hard spheres 、 Mechanical engineering 、 General Physics and Astronomy 、 Fluid Flow and Transfer Processes
摘要: Abstract The present paper is concerned with the modeling and simulation of particle agglomeration rigid, dry electrostatically neutral particles in turbulent gas flows. Based on a deterministic collision model framework an Euler–Lagrange approach for description disperse particle-laden flows, original Kosinski Hoffmann (2010) improved regarding determination time. application area extended towards fully three-dimensional flows simulated by large-eddy technique. Additionally, enhanced introducing three different concepts to structure arising agglomerate, namely volume-equivalent sphere model, inertia-equivalent closely-packed model. Furthermore, resulting strategy shear first analyzed evaluated concerning models. Then, performance tested investigating influence various parameters such as restitution friction coefficients particles, inclusion two-way coupling, subgrid-scale lift forces, wall roughness mass loading process vertical channel flow. In parameter study solely adopted, since it takes interstitial space between agglomerated into account additionally satisfies conservation angular momentum. results, can be concluded that using agglomerate realistically predicts physical behavior within
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