LBM simulations on agglomerate transport and deposition
Agglomerated particles appear in various technical applications of the process industry in form of products, waste or contamination. Desired or undesired, these complex-structured particles need to be handled, involving transportation and separation processes, agglomerate growth and breakup as well as stabilization techniques. Both, fundamental research and industry have a strong demand of knowledge about agglomerate behavior. Numerical simulations are capable to provide an addition or even substitution of experimental data if accessibility is limited or too expensive, In this work, the Lattice Boltzmann Method (LBM) is used to perform high resolution simulations of agglomerates to investigate agglomerate transport and deposition depending on flow conditions and agglomerate structure. This paper presents an approach to generate and characterize three-dimensional agglomerates and to predict the flow around these aggregated structures using a 3D multi-scale LBM. The considered agglomerates are composed of spherical primary particles which are connected to each other by rigid joints. The characterization of the agglomerates is done using common equivalent diameters as well as the fractal dimension and the convex hull. Simulating the flow field around the agglomerates leads to the forces and torques acting on the aggregates. From that the drag, lift and torque coefficients can be determined and their dependencies on agglomerate structure, orientation and flow conditions can be estimated. The overall aim is modeling and simulating transport and deposition processes of agglomerated particles.
Lattice Boltzmann Method Agglomerate Transport Aerodynamic Coefficients
Mathias Dietzel Martin Sommerfeld
Dept.of Mechanical Engineering, Martin-Luther-University Halle-Wittenberg, Germany
国际会议
西安
英文
796-801
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）