TY - JOUR
T1 - Simulation of Finite-Size Particles in Turbulent Flows Using the Lattice Boltzmann Method
AU - Abhineet Gupta, Herman J. H. Clercx & Federico Toschi
JO - Communications in Computational Physics
VL - 3
SP - 665
EP - 684
PY - 2018
DA - 2018/03
SN - 23
DO - http://doi.org/10.4208/cicp.OA-2016-0268
UR - https://global-sci.org/intro/article_detail/cicp/10543.html
KW - Lattice Boltzmann method, moving bounce-back, turbulent pipe flow, particles in turbulence, finite-size particles, stresslet.
AB - <p style="text-align: justify;">Particle laden turbulent flows occur in a variety of industrial applications.
While the numerical simulation of such flows has seen significant advances in recent
years, it still remains a challenging problem. Many studies investigated the rheology of
dense suspensions in laminar flows as well as the dynamics of point-particles in turbulence.
Here we will present results on the development of numerical algorithms, based
on the lattice Boltzmann method, suitable for the study of suspensions of finite-size
particles under turbulent flow conditions. The turbulent flow is modeled by the lattice
Boltzmann method, and the interaction between particles and carrier fluid is modeled
using the bounce-back rule. Direct contact and lubrication force models for particle-particle
interactions and particle-wall interaction are taken into account to allow for
a full four-way coupled interaction. The accuracy and robustness of the method is
discussed by validating the velocity profile in turbulent pipe flow, the sedimentation
velocity of spheres in duct flow and the resistance functions of approaching particles.
Preliminary results from the turbulent pipe flow simulations with particles show that
the angular and axial velocities of the particles are scattered around values of mean
axial velocity and shear rate obtained from the Eulerian velocity field.</p>