# Large-eddy simulation of heavy particle dispersion in wall-bounded turbulent flows

## Abstract

Capabilities and accuracy issues in Lagrangian tracking of heavy particles in velocity fields obtained from large-eddy simulations (LES) of wall-bounded turbulent flows are reviewed. In particular, it is shown that, if no subgrid scale (SGS) model is added to the particle motion equations, particle preferential concentration and near-wall accumulation are significantly underestimated. Results obtained with SGS modeling for the particle motion equations based on approximate deconvolution are briefly recalled. Then, the error purely due to filtering in particle tracking in LES flow fields is singled out and analyzed. The statistical properties of filtering errors are characterized in turbulent channel flow both from an Eulerian and a Lagrangian viewpoint. Implications for stochastic SGS modeling in particle motion equations are briefly outlined.

- Authors:

- DICI, University of Pisa, I-56122 Pisa (Italy)

- Publication Date:

- OSTI Identifier:
- 22391039

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: AIP Conference Proceedings; Journal Volume: 1648; Journal Issue: 1; Conference: ICNAAM-2014: International Conference on Numerical Analysis and Applied Mathematics 2014, Rhodes (Greece), 22-28 Sep 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; APPROXIMATIONS; CONCENTRATION RATIO; EQUATIONS OF MOTION; ERRORS; FILTERS; LAGRANGIAN FUNCTION; LARGE-EDDY SIMULATION; PARTICLES; STOCHASTIC PROCESSES; TURBULENT FLOW; VELOCITY

### Citation Formats

```
Salvetti, M.V..
```*Large-eddy simulation of heavy particle dispersion in wall-bounded turbulent flows*. United States: N. p., 2015.
Web. doi:10.1063/1.4912322.

```
Salvetti, M.V..
```*Large-eddy simulation of heavy particle dispersion in wall-bounded turbulent flows*. United States. doi:10.1063/1.4912322.

```
Salvetti, M.V.. Tue .
"Large-eddy simulation of heavy particle dispersion in wall-bounded turbulent flows". United States.
doi:10.1063/1.4912322.
```

```
@article{osti_22391039,
```

title = {Large-eddy simulation of heavy particle dispersion in wall-bounded turbulent flows},

author = {Salvetti, M.V.},

abstractNote = {Capabilities and accuracy issues in Lagrangian tracking of heavy particles in velocity fields obtained from large-eddy simulations (LES) of wall-bounded turbulent flows are reviewed. In particular, it is shown that, if no subgrid scale (SGS) model is added to the particle motion equations, particle preferential concentration and near-wall accumulation are significantly underestimated. Results obtained with SGS modeling for the particle motion equations based on approximate deconvolution are briefly recalled. Then, the error purely due to filtering in particle tracking in LES flow fields is singled out and analyzed. The statistical properties of filtering errors are characterized in turbulent channel flow both from an Eulerian and a Lagrangian viewpoint. Implications for stochastic SGS modeling in particle motion equations are briefly outlined.},

doi = {10.1063/1.4912322},

journal = {AIP Conference Proceedings},

number = 1,

volume = 1648,

place = {United States},

year = {Tue Mar 10 00:00:00 EDT 2015},

month = {Tue Mar 10 00:00:00 EDT 2015}

}