Capturing aerosol droplet nucleation and condensation bursts using PISO and TVD schemes

E.M.A. Frederix, Arkadiusz K. Kuczaj, M. Nordlund, Bernardus J. Geurts

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    Abstract

    A mathematical model for single-species aerosol production and transport is formulated, and solved using an adapted PISO algorithm. The model is applied to a laminar flow diffusion chamber, using a finite volume method on a collocated grid. In tran- sient simulations, a sharp scalar front (e.g., vapor mass fraction), is shown to introduce unphysical oscillation in the solution, when applying a second order linear interpolation in the convective terms. At increased grid resolution, these oscillations are strongly at- tenuated. When applying a TVD scheme (here the MUSCL scheme), a time-accurate monotonicity-preserving solution is obtained. The numerical dissipation introduced by the MUSCL scheme implies increased spatial resolution to restore high accuracy levels. We develop a one-dimensional grid refinement algorithm, which relates the grid density in one direction to the magnitude of the scalar gradient. In combination with the MUSCL scheme, this gives accurate results, with a significant reduction in computational effort, in comparison with a uniform fine grid.
    Original languageUndefined
    Title of host publicationProceedings of the 6th European Conference on Computational Fluid Mechanics, ECFD 2014
    Place of PublicationBarcelona, Spain
    PublisherEuropean Community on Computational Methods in Applied Sciences
    Pages3462-3472
    Number of pages11
    ISBN (Print)978-84-942844-7-2
    Publication statusPublished - 20 Jul 2014
    Event6th European Conference on Computational Fluid Mechanics, ECFD 2014, Barcelona, Spain: Proceedings of the 6th European Conference on Computational Fluid Mechanics, ECFD 2014 - Barcelona, Spain
    Duration: 20 Jul 2014 → …

    Publication series

    Name
    PublisherEuropean Community on Computational Methods in Applied Sciences

    Conference

    Conference6th European Conference on Computational Fluid Mechanics, ECFD 2014, Barcelona, Spain
    CityBarcelona, Spain
    Period20/07/14 → …

    Keywords

    • MACS-MMS: Multiscale Modelling and Simulation
    • METIS-309823
    • IR-93884
    • EWI-25587

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