Quasiequilibrium lattice Boltzmann models with tunable bulk viscosity for enhancing stability

Item Type: Article
MIUR type: Article > Journal article
Title: Quasiequilibrium lattice Boltzmann models with tunable bulk viscosity for enhancing stability
Authors string: P. Asinari, I.V. Karlin
University authors:
Journal or Publication Title: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS
Referee type: Not specified type
Publisher: American Physical Society
Volume: 81
Number: (01670
Number of Pages: 15
ISSN: 1539-3755
Abstract: Taking advantage of a closed-form generalized Maxwell distribution function [ P. Asinari and I. V. Karlin Phys. Rev. E 79 036703 (2009)] and splitting the relaxation to the equilibrium in two steps, an entropic quasiequilibrium (EQE) kinetic model is proposed for the simulation of low Mach number flows, which enjoys both the H theorem and a free-tunable parameter for controlling the bulk viscosity in such a way as to enhance numerical stability in the incompressible flow limit. Moreover, the proposed model admits a simplification based on a proper expansion in the low Mach number limit (LQE model). The lattice Boltzmann implementation of both the EQE and LQE is as simple as that of the standard lattice Bhatnagar-Gross-Krook (LBGK) method, and practical details are reported. Extensive numerical testing with the lid driven cavity flow in two dimensions is presented in order to verify the enhancement of the stability region. The proposed models achieve the same accuracy as the LBGK method with much rougher meshes, leading to an effective computational speed-up of almost three times for EQE and of more than four times for the LQE. Three-dimensional extension of EQE and LQE is also discussed
Date: 2010
Status: Published
Language of publication: English
Uncontrolled Keywords:
Departments (original): DENER - Energetics
Departments: DENERG - Department of Energy
Related URLs:
    Subjects: Area 09 - Ingegneria industriale e dell'informazione > FISICA TECNICA INDUSTRIALE
    Date Deposited: 12 Jan 2010 18:01
    Last Modified: 30 Oct 2014 14:47
    Id Number (DOI): 10.1103/PhysRevE.81.016702
    Permalink: http://porto.polito.it/id/eprint/2294914
    Linksolver URL: Linksolver link
    Citations:

    This field presents the citations number present on Scopus and Web of Science databases e links to the remote records. Also Google Scholar link is present.

    There may be discrepancies with respect to the data in databases for the following reasons:

    • Differences from fields (title, year,...) in UGOV and those in the databases.
    • PORTO citations are extracted monthly. The db is in real time
    • The WoS citation number reflect the collections subscribed by Politecnico (Science citation index Expanded and Conference Proceedings Citation Index)

    For informations contact scrivia/porto

    +
    -

    Documents

    [img] PDF (2294914) - Postprint
    Document access: Not visible (accessible only to the record owner)
    Licence: Not public - Private access / Restricted.

    Download (1442Kb) | Send a request to the author for a copy of the paper
    [img]
    Preview
    PDF (preprint_Asinari_PRE_2010a) - Preprint
    Document access: Anyone
    Licence: Public - All rights reserved.

    Download (1566Kb) | Preview

    Actions (login required)

    View Item View Item

    Document Downloads

    More statistics for this item...