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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

Software:

PETSc; ParMETIS; Chaco
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References:

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