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Simulation of a turbulent flow around a moving circular cylinder using the LBM
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SYSNO ASEP 0468462 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV O - Ostatní Název Simulation 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. Akce International Conference for Mesoscopic Methods in Engineering and Science /13./ Datum konání 18.07.2016 - 22.07.2016 Místo konání Hamburg Země DE - Německo Typ akce WRD Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova Lattice Boltzmann method ; moving cylinder ; Smagorinsky subgrid model Vědní obor RIV BK - Mechanika tekutin CEP GA15-18870S GA ČR - Grantová agentura ČR Institucionální podpora UH-J - RVO:67985874 Anotace The 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. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2017
Počet záznamů: 1