A formulation for fully resolved simulation (FRS) of particle-turbulence interactions in two-phase flows

Sourabh V. Apte*, Neelesh A. Patankar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A numerical formulation for fully resolved simulations of freely moving rigid particles in turbulent flows is presented. This work builds upon the fictitious-domain based approach for fast computation of fluid-rigid particle motion by Sharma & Patankar ([1] Ref. J. Compt. Phy., (205), 2005). The approach avoids explicit calculation of distributed Lagrange multipliers to impose rigid body motion and reduces the computational overhead due to the particle-phase. Implementation of the numerical algorithm in co-located, finite-volume-based, energy conserving fractional-step schemes on structured, Cartesian grids is presented. The numerical approach is first validated for flow over a fixed sphere at various Reynolds numbers and flow generated by a freely falling sphere under gravity. Grid and time-step convergence studies are performed to evaluate the accuracy of the approach. Finally, simulation of 125 cubical particles in a decaying isotropic turbulent flow is performed to study the feasibility of simulations of turbulent flows in the presence of freely moving, arbitrary-shaped rigid particles.

Original languageEnglish (US)
Pages (from-to)1-16
Number of pages16
JournalInternational Journal of Numerical Analysis and Modeling
Volume5
Issue numberSUPPL.
StatePublished - 2008

Keywords

  • DNS
  • Fully resolved particles
  • Particle-turbulence interaction
  • Point-particle

ASJC Scopus subject areas

  • Numerical Analysis

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