A discrete contact model for complex arbitrary-shaped convex geometries  

作　　者：Jan E.Marquardt Ulrich J.Römer Hermann Nirschl Mathias J.Krause 

机构地区：[1]Lattice Boltzmann Research Group,Karlsruhe Institute of Technology,Straße am Forum 8,Karlsruhe,76131,Germany [2]Institute for Mechanical Process Engineering and Mechanics,Karlsruhe Institute of Technology,Straße am Forum 8,Karlsruhe,76131,Germany [3]Institute of Engineering Mechanics,Karlsruhe Institute of Technology,Kaiserstraße 10,Karlsruhe,76131,Germany [4]Institute for Applied and Numerical Mathematics,Karlsruhe Institute of Technology,Englerstraße 2,Karlsruhe,76131,Germany

出　　处：《Particuology》2023年第9期180-191,共12页颗粒学报（英文版）

基　　金：The research leading to these results was conducted during the IGF Project AiF 21096 N of the FEI that has been supported via AiF within the programme for promoting the Industrial Collective Research(IGF)of the Federal Ministry of Economic Affairs and Climate Action(BMWK)based on a resolution of the German Parliament.

摘　　要：The shape of particles has a significant influence on the behavior of suspensions,as the particle-fluid,particle-particle,and particle-wall interactions depend on it.However,the simultaneous consideration of complex particle shapes and four-way coupling remains a major challenge.This is mainly due to a lack of suitable contact models.Contact models for complex shapes have been proposed in literature,and most limit the accuracy of the particle-fluid interaction.For this reason,this paper presents a novel contact model for complex convex particle shapes for use with partially saturated methods,in which we propose to obtain necessary contact properties,such as the indentation depth,by a discretization of the contact area.The goal of the proposed model is to enable comprehensive and accurate studies of particulate flows,especially with high volume fractions,that lead to new insights and contribute to the improvement of existing industrial processes.To ensure correctness and sustainability,we validate the model extensively by studying cases with and without fluid.In the latter case,we use the homogenized lattice Boltzmann method.The provided investigations show a great agreement of the proposed discrete contact model with analytical solutions and the literature.

关 键 词：Partially saturated cells method Homogenized lattice Boltzmann method Arbitrarily shaped particle Discrete contact model Particle-resolved simulation OpenLB 

分 类 号：O17[理学—数学]