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**A scalable parallel algorithm for the direct numerical simulation of three-dimensional incompressible particulate flow.**
*(English)*
Zbl 1184.76694

Summary: 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.

### MSC:

76F65 | Direct numerical and large eddy simulation of turbulence |

76T20 | Suspensions |

65Y05 | Parallel numerical computation |

### Keywords:

particulate flow; multiphase flow; DNS; parallel computing; unstructured grid domain decomposition
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\textit{S. Jin} et al., Int. J. Comput. Fluid Dyn. 23, No. 5, 427--437 (2009; Zbl 1184.76694)

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