Validation of large eddy simulation of flow behind a circular cylinder

0551999 - ÚT 2022 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Isoz, Martin - Hlavatý, Tomáš - Uruba, Václav - Procházka, Pavel P.
Validation of large eddy simulation of flow behind a circular cylinder.
20th Conference on Power System Engineering. Les Ulis Cedex A: EDP Sciences, 2021 - (Richter, L.; Pelikan, M.; Volf, M.; Vackova, M.), č. článku 00013. MATEC Web of Conferences, 345. E-ISSN 2261-236X.
[Conference on Power System Engineering /20./. Plzeň (CZ), 07.09.2021-09.09.2021]
Grant CEP: GA MŠMT(CZ) EF15_003/0000493; GA ČR(CZ) GC19-02288J
Institucionální podpora: RVO:61388998
Klíčová slova: LES * PIV * POD * circular cylinder
Obor OECD: Mechanical engineering
https://www.matec-conferences.org/articles/matecconf/abs/2021/14/matecconf_pse2021_00013/matecconf_pse2021_00013.html

The flow in the wake behind a circular cylinder in a cross-flow at Reynolds number of 4815 was studied both experimentally and via mathematical modeling. The mathematical model was performed as a Large Eddy Simulation (LES), while the experiments were carried out using the time-resolved variant of the Particle Image Velocimetry (PIV) method. Both the simulation and experiment took into account the dynamical aspects of the studied phenomenon, which enabled a detailed validation of the mathematical model. The overall statistical properties of the simulated flow were validated via comparing the time-averaged measured and computed velocity and vorticity fields. To validate the dynamical behavior, the velocity spectra were examined first. Next, the Proper Orthogonal Decomposition (POD) of the spatio-temporal velocity data was performed on both the experimental and numerical data and a comparison of the obtained energetic modes was carried out. All the performed validations have shown a satisfactory agreement between the simulation and the experiment.
Trvalý link: http://hdl.handle.net/11104/0327499