DOE ACTS COLLECTION Workshop Robust and High Performance Tools for Scientific Computing

September 4-7, 2002

Dewei Qi
Western Michigan University

Computational Problem:

Lattice Boltzmann simulation of multiparticle suspensions

Abstract

In this proposed research project, the dynamical migration and rotation of ellipsoidal, disc-shaped, and cylindrical particles in sedimenting, Couette, and Poiseuille flows at finite Reynolds numbers will be investigated in a three-dimensional space using a lattice Boltzmann (LB) method and Newtonian dynamic simulations in a supercomputer. The effects of inertia, shear rates, buoyant forces, shapes, sizes, and concentrations of the particles on migration, rheological properties, orientations, and micro-structures will be studied and the mechanisms of interactions between particles and fluid will be analyzed. This project is to understand the essence of the complexities of sedimentation, flocculation, coagulation and dispersion of non-spherical particles in a wide variety of engineering flows by using parallel computing. The part of PI's research is currently supported by the America Chemical Society and several supercomputer centers such as NERSC of DOE.

Publications:
1)Dewei Qi, Lishi Luo " Rotational and orientational behavior of 3D spheroidal particles in the Couette flows" accepted by J. Fluid Mech, 2002.
2) Dewei Qi, Lishi Luo, Raja Aravamuthan and William Strieder " Lateral Migration and Orientation of ellitical particles in Poiseuille flows" J Stat. Phys. 107 (1/2), 101, (2002).
3) Dewei Qi, ``Simulations of Fluidization of Cylindrical Particles in a 3-D Space", Int. J. Multiphase Flows, 27 (1) 107-118, (2001).