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Presentation
Numerical Description of Dilute Particle-Laden FLows by a Quadrature-Based Moment Method
Chemical and Biological Engineering Conference Presentations and Proceedings
  • N. Le Lostec, Office National d'Etudes et de Recherches Aerospatiales, France
  • Rodney O. Fox, Iowa State University
  • O. Simonin, Institut de Macanique des Fluides de Toulouse, France
  • P. Villedieu, Office National d'Etudes et de Recherches Aerospatiales, France
Document Type
Conference Proceeding
Conference
Proceedings of the Summer Program 2008 - Center for Turbulence Research
Publication Date
1-1-2008
Geolocation
(37.42410599999999, -122.1660756)
Abstract
The numerical simulation of gas-particle flows is divided into two families of methods. In Euler-Lagrange methods individual particle trajectories are computed, whereas in Euler-Euler methods particles are characterized by statistical descriptors. Lagrangian methods are very precise but their computational cost increases with instationarity and particle volume fraction. In Eulerian methods (also called moment methods) the particle-phase computational cost is comparable to that of the fluid phase but requires strong simplificaions. Existing Eulerian models consider unimodal or close-to-equilibrium particle velocity distributions and then fail when the actual distribution is far from equilibrium. Quadrature-based Eulerian methods introduce a new reconstruction of the velocity distribution, written as a sum of delta functions in phase space constrained to give the right values for selected low-order moments. Two of the quadrature-based Eulerian methods, differing by the reconstruction algorithm, are the focus of this work. Computational results for two academic cases (crossing jets, Taylor-Green flow) are compared to those of a Lagrangian method (considered as the reference solution) and of an existing second-order moment method. With the quadrature-based Eulerian methods, significant qualitative improvement is noticed compared to the second-order moment method in the two test cases.
Comments

This article is from Proceedings of the 2008 Summer Program, Center for Turbulence Research, Stanford, CA, pp.209-221.

Language
en
Citation Information
N. Le Lostec, Rodney O. Fox, O. Simonin and P. Villedieu. "Numerical Description of Dilute Particle-Laden FLows by a Quadrature-Based Moment Method" Stanford, CA(2008)
Available at: http://works.bepress.com/rodney_fox/49/