Study of two-way coupled particle laden turbulent flow over a backward-facing step using large-eddy simulation

Large-eddy simulation (LES) is a computationally viable strategy to study particle-laden turbulent flows in practically relevant configurations, although modeling challenges need to be addressed for improved predictive capabilities. In this study, we perform a comprehensive assessment of subgrid-scale (SGS) models for LES by considering a two-way coupled particle-laden turbulent flow over a backward-facing step. We consider dynamic eddy viscosity, wall-adapting local eddy viscosity (WALE), and dynamic one-equation models for the closure of the SGS stress tensor, and the random walk (RW) and the differential filter (DF) based models for the subgrid dispersion. The assessment of subgrid models is carried out by comparison of simulation results against the available experimental data. Based on the assessment studies, the WALE model for the SGS stress tensor and the RW model for the subgrid dispersion are considered to examine the effects of inertia, coupling, and polydispersity on the statistics of carrier and dispersed phases.

Grantor dc:publisher

University of Tennessee at Chattanooga

Author dc:creator

• Johnston, Timothy

Contributors dc:contributor

• Ranjan, Reetesh
• Sreenivas, Kidambi; Elliott, Trevor; Arabshahi, Abdollah
• College of Engineering and Computer Science

• Multiphase flows--Mathematical models
• Turbulence

Licence

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/734

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1906