Application of a robust and efficient Lagrangian particle scheme to soot transport in turbulent flames

A. Attili, F. Bisetti

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A Lagrangian particle scheme is applied to the solution of soot dynamics in turbulent nonpremixed flames. Soot particulate is described using a method of moments and the resulting set of continuum advection-reaction equations is solved using the Lagrangian particle scheme. The key property of the approach is the independence between advection, described by the movement of Lagrangian notional particles along pathlines, and internal aerosol processes, evolving on each notional particle via source terms. Consequently, the method overcomes the issues in Eulerian grid-based schemes for the advection of moments: errors in the advective fluxes pollute the moments compromising their realizability and the stiffness of source terms weakens the stability of the method. The proposed scheme exhibits superior properties with respect to conventional Eulerian schemes in terms of stability, accuracy, and grid convergence. Taking into account the quality of the solution, the Lagrangian approach can be computationally more economical than commonly used Eulerian schemes as it allows the resolution requirements dictated by the different physical phenomena to be independently optimized. Finally, the scheme posseses excellent scalability on massively parallel computers.
Original languageUndefined/Unknown
Pages (from-to)164-175
Number of pages12
JournalComputers and Fluids
Publication statusPublished - 5 Jun 2013

Keywords / Materials (for Non-textual outputs)

  • Lagrangian particle scheme
  • Moment methods
  • soot
  • turbulent flames

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