One challenge of today’s research is the realistic simulation of disordered many particle systems in static and dynamic/flow situations. Examples are particulate and granular materials like sand, powders, ceramics or composites, with applications in particle-technology and geo-technical/physical systems. The inhomogeneous microstructure of such materials makes it very difficult to model them with continuum methods, which typically assume homogeneity on the microscale and scale separation between the constituents and the macroscopic fields. As an alternative, discrete particle methods can be applied, since they intrinsically take the micro-structure into account. The ultimate challenge is to bridge the gap between both approaches by using particlesimulations to obtain appropriate constitutive relations for continuum theories, and work with those on the macro-scale. Here, soft and hard particle simulation methods are introduced as well as the micro-macro transition to obtain the continuum fields from the particle data. Two application examples discussed in detail concern the flow of particle down an incline, as relevant for geo-flows, as well as a vibrated granular system as relevant for highly agitated transport or conveying processes.
|Title of host publication||ALERT Doctoral School 2017|
|Subtitle of host publication||Discrete Element Modeling|
|Editors||Stefan Luding, Gaël Combe, Kianoosh Taghizadeh|
|Publisher||Alliance of Laboratories in Europe for Education, Research and Technology|
|Number of pages||39|
|Publication status||Published - 5 Oct 2017|
|Event||ALERT Geomaterials Doctoral School 2017: Discrete Element Modeling - Aussois, France|
Duration: 5 Oct 2017 → 7 Oct 2017
|Course||ALERT Geomaterials Doctoral School 2017|
|Period||5/10/17 → 7/10/17|
Luding, S., Rivas Abud, N., & Weinhart, T. (2017). From soft and hard particle simulations to continuum theory for granular flows. In S. Luding, G. Combe, & K. Taghizadeh (Eds.), ALERT Doctoral School 2017: Discrete Element Modeling (pp. 3-42). Alliance of Laboratories in Europe for Education, Research and Technology.