### Abstract

We report on the development of a method to simulate from first principles the particle filtration efficiency of filters that are composed of structured porous media. We assume that the ratio of particle density to the fluid density is high. We concentrate on the motion of the particles in a laminar flow and quantify the role of inertial effects on the filtration of an ensemble of particles. We adopt the Euler-Lagrange approach, distinguishing a flow field in which the motion of a large number of discrete particles is simulated. We associate filtration with the deterministic collision of inertial particles with solid elements of the structured porous medium. To underpin the physical `consistency' of deterministic particle filtration, we investigate to what extent the particle tracking algorithm ensures that mass-less test-particles will not be captured by the structured porous filter at all. This element of the algorithm is essential in order to distinguish physical filtration by inertial effects from unwanted numerical filtration, due to the finite spatial resolution of the gas flow. We consider filtration of particles whose motion is governed by Stokes drag and determine the filtration efficiency in a range of Stokes relaxation times. An exponential decay of the number of particles with time is observed.

Original language | English |
---|---|

Title of host publication | Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010 |

Editors | J.C.F Pereira, A. Sequeira, J.M.C. Pereira |

Place of Publication | Lisbon, Portugal |

Publisher | Technical University of Lisbon |

Pages | 01197 |

Number of pages | 9 |

ISBN (Print) | 978-989-96778-1-4 |

Publication status | Published - 2010 |

Event | 5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010 - Lisbon, Portugal Duration: 14 Jun 2010 → 17 Jun 2010 Conference number: 5 |

### Conference

Conference | 5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010 |
---|---|

Abbreviated title | ECCOMAS ECFD 2010 |

Country | Portugal |

City | Lisbon |

Period | 14/06/10 → 17/06/10 |

### Keywords

- Aeosol Filtration
- Structured porous media
- Immersed boundary method
- Filtration efficiency
- Particle tracking
- Stokes Number

## Fingerprint Dive into the research topics of 'Simulation of impaction filtration of aerosol droplets in porous media'. Together they form a unique fingerprint.

## Cite this

Ghazaryan, L., Lopez Penha, D. J., Geurts, B. J., Stolz, S., Stolz, S., & Winkelmann, C. (2010). Simulation of impaction filtration of aerosol droplets in porous media. In J. C. F. Pereira, A. Sequeira, & J. M. C. Pereira (Eds.),

*Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010*(pp. 01197). Lisbon, Portugal: Technical University of Lisbon.