Inertial particle velocity and distribution in vertical turbulent channel flow: A numerical and experimental comparison

Guiquan Wang, Kee Onn Fong, Filippo Coletti, Jesse Capecelatro, David H. Richter

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

This study is concerned with the statistics of vertical turbulent channel flow laden with inertial particles for two different volume concentrations (ΦV=3×10−6 and ΦV=5×10−5) at a Stokes number of St+=58.6 based on viscous units. Two independent direct numerical simulation models utilizing the point-particle approach are compared to recent experimental measurements, where all relevant nondimensional parameters are directly matched. While both numerical models are built on the same general approach, details of the implementations are different, particularly regarding how two-way coupling is represented. At low volume loading, both numerical models are in general agreement with the experimental measurements, with certain exceptions near the walls for the wall-normal particle velocity fluctuations. At high loading, these discrepancies are increased, and it is found that particle clustering is overpredicted in the simulations as compared to the experimental observations. Potential reasons for the discrepancies are discussed. As this study is among the first to perform one-to-one comparisons of particle-laden flow statistics between numerical models and experiments, it suggests that continued efforts are required to reconcile differences between the observed behavior and numerical predictions.

Original languageEnglish (US)
Article number103105
JournalInternational Journal of Multiphase Flow
Volume120
DOIs
StatePublished - Nov 2019

Bibliographical note

Funding Information:
The authors acknowledge grants G00003613-ArmyW911NF-17-0366 from the U.S. Army Research Office and N00014-16-1-2472 from the Office of Naval Research. Computational resources were provided by the High Performance Computing Modernization Program (HPCMP), and by the ND Center for Research Computing.

Funding Information:
The authors acknowledge grants G00003613-ArmyW911NF-17-0366 from the U.S. Army Research Office and N00014-16-1-2472 from the Office of Naval Research. Computational resources were provided by the High Performance Computing Modernization Program (HPCMP), and by the ND Center for Research Computing.

Keywords

  • Experiment
  • Inertial particles
  • Simulations
  • Wall turbulence

Fingerprint Dive into the research topics of 'Inertial particle velocity and distribution in vertical turbulent channel flow: A numerical and experimental comparison'. Together they form a unique fingerprint.

Cite this