Abstract
Particulate flow is of great importance from both the scientific and engineering points of view. Owing to the complexity of particle-flow interactions, direct numerical simulations (DNS) of inertial particulate flow with finite-size particles have been limited to a very small number of particles, while the industrial applications involve larger numbers with many orders of magnitude. This article presents a parallel implementation of a fictitious domain method for the DNS of particulate flows. The method is thoroughly tested and its parallel performance on distributed memory clusters is evaluated on a large-scale problem. Finally, we present the results for the separation of 21,336 particles of two different densities in a viscous fluid. Although there is still a significant gap between DNS and the industrial applications, the present algorithm allows to simulate significantly large number of particles so that a meaningful statistical analysis can be performed. This will help in the development of new closure relations for the averaged models of multiphase flows.
Original language | English |
---|---|
Pages (from-to) | 427-437 |
Number of pages | 11 |
Journal | International Journal of Computational Fluid Dynamics |
Volume | 23 |
Issue number | 5 |
DOIs | |
State | Published - Jun 2009 |
Externally published | Yes |
Keywords
- DNS
- Multiphase flow
- Parallel computing
- Particulate flow
- Unstructured grid domain decomposition