Počet záznamů: 1  

Simulation of a turbulent flow around a moving circular cylinder using the LBM

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    SYSNO ASEP0468462
    Druh ASEPC - Konferenční příspěvek (mezinárodní konf.)
    Zařazení RIVO - Ostatní
    NázevSimulation of a turbulent flow around a moving circular cylinder using the LBM
    Tvůrce(i) Dolanský, Jindřich (UH-J) SAI, ORCID, RID
    Zdroj.dok., 2016
    Poč.str.1 s.
    AkceInternational Conference for Mesoscopic Methods in Engineering and Science /13./
    Datum konání18.07.2016 - 22.07.2016
    Místo konáníHamburg
    ZeměDE - Německo
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.DE - Německo
    Klíč. slovaLattice Boltzmann method ; moving cylinder ; Smagorinsky subgrid model
    Vědní obor RIVBK - Mechanika tekutin
    CEPGA15-18870S GA ČR - Grantová agentura ČR
    Institucionální podporaUH-J - RVO:67985874
    AnotaceThe unsteady flow incited by motion of a circular cylinder in a rectangular container in water is examined by the Lattice Boltzmann Method (LBM) based simulation. The variable velocity of the cylinder is controlled by an electrical device. First the cylinder approaches the bottom, then it rests for some time at the bottom, and finally it leaves along the original path. The turbulent flow around the cylinder arises as the Reynolds number of the cylinder is Re ~ 10^3 - 10^4. The most important advantage of the LBM consists in the possibility of overall parallelization of the algorithm which is enabled by its local dynamics. However, there are still accuracy and stability issues to be established. For high values of the Reynolds number the LBM can be subject to numerical instabilities which are caused by incapability of the LBM to dissipate energy at the sub-grid scale due to very large gradients. Hence, the turbulent flow is simulated with the help of the LBM enriched with the Smagorinsky subgrid model. The correctness of the simulation is validated against experimental outputs.
    PracovištěÚstav pro hydrodynamiku
    KontaktSoňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
    Rok sběru2017
Počet záznamů: 1  

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