Simulation of impaction filtration of aerosol droplets in porous media

L. Ghazaryan, D.J. Lopez Penha, Bernardus J. Geurts, S. Stolz, Steffen Stolz, Christoph Winkelmann

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

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    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 languageEnglish
    Title of host publicationProceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010
    EditorsJ.C.F Pereira, A. Sequeira, J.M.C. Pereira
    Place of PublicationLisbon, Portugal
    PublisherTechnical University of Lisbon
    Pages01197
    Number of pages9
    ISBN (Print)978-989-96778-1-4
    Publication statusPublished - 2010
    Event5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010 - Lisbon, Portugal
    Duration: 14 Jun 201017 Jun 2010
    Conference number: 5

    Conference

    Conference5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010
    Abbreviated titleECCOMAS ECFD 2010
    CountryPortugal
    CityLisbon
    Period14/06/1017/06/10

    Fingerprint

    aerosols
    simulation
    filters
    particle motion
    laminar flow
    drag
    gas flow
    flow distribution
    spatial resolution
    relaxation time
    collisions
    fluids
    decay

    Keywords

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

    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.
    Ghazaryan, L. ; Lopez Penha, D.J. ; Geurts, Bernardus J. ; Stolz, S. ; Stolz, Steffen ; Winkelmann, Christoph. / Simulation of impaction filtration of aerosol droplets in porous media. Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010. editor / J.C.F Pereira ; A. Sequeira ; J.M.C. Pereira. Lisbon, Portugal : Technical University of Lisbon, 2010. pp. 01197
    @inproceedings{e5f57a6280f74f87bc4412a82f08dba1,
    title = "Simulation of impaction filtration of aerosol droplets in porous media",
    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.",
    keywords = "Aeosol Filtration, Structured porous media, Immersed boundary method, Filtration efficiency, Particle tracking, Stokes Number",
    author = "L. Ghazaryan and {Lopez Penha}, D.J. and Geurts, {Bernardus J.} and S. Stolz and Steffen Stolz and Christoph Winkelmann",
    year = "2010",
    language = "English",
    isbn = "978-989-96778-1-4",
    pages = "01197",
    editor = "J.C.F Pereira and A. Sequeira and J.M.C. Pereira",
    booktitle = "Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010",
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    Ghazaryan, L, Lopez Penha, DJ, Geurts, BJ, Stolz, S, Stolz, S & Winkelmann, C 2010, Simulation of impaction filtration of aerosol droplets in porous media. in JCF Pereira, A Sequeira & JMC Pereira (eds), Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010. Technical University of Lisbon, Lisbon, Portugal, pp. 01197, 5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010, Lisbon, Portugal, 14/06/10.

    Simulation of impaction filtration of aerosol droplets in porous media. / Ghazaryan, L.; Lopez Penha, D.J.; Geurts, Bernardus J.; Stolz, S.; Stolz, Steffen; Winkelmann, Christoph.

    Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010. ed. / J.C.F Pereira; A. Sequeira; J.M.C. Pereira. Lisbon, Portugal : Technical University of Lisbon, 2010. p. 01197.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

    TY - GEN

    T1 - Simulation of impaction filtration of aerosol droplets in porous media

    AU - Ghazaryan, L.

    AU - Lopez Penha, D.J.

    AU - Geurts, Bernardus J.

    AU - Stolz, S.

    AU - Stolz, Steffen

    AU - Winkelmann, Christoph

    PY - 2010

    Y1 - 2010

    N2 - 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.

    AB - 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.

    KW - Aeosol Filtration

    KW - Structured porous media

    KW - Immersed boundary method

    KW - Filtration efficiency

    KW - Particle tracking

    KW - Stokes Number

    M3 - Conference contribution

    SN - 978-989-96778-1-4

    SP - 01197

    BT - Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010

    A2 - Pereira, J.C.F

    A2 - Sequeira, A.

    A2 - Pereira, J.M.C.

    PB - Technical University of Lisbon

    CY - Lisbon, Portugal

    ER -

    Ghazaryan L, Lopez Penha DJ, Geurts BJ, Stolz S, Stolz S, Winkelmann C. Simulation of impaction filtration of aerosol droplets in porous media. In Pereira JCF, Sequeira A, Pereira JMC, editors, Proceedings of the V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010. Lisbon, Portugal: Technical University of Lisbon. 2010. p. 01197