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Numerical assessment of stratification influence in simple algebraic turbulence model
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SYSNO ASEP 0554642 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Numerical assessment of stratification influence in simple algebraic turbulence model Tvůrce(i) Uhlíř, V. (CZ)
Bodnár, Tomáš (MU-W) RID, SAI, ORCID
Caggio, Matteo (MU-W) SAI, RIDZdroj.dok. Proceedings of Topical Problems of Fluid Mechanics 2022. - Prague : Institute of Thermomechanics AS CR, 2022 / Šimurda D. ; Bodnár T. - ISSN 2336-5781 - ISBN 978-80-87012-77-2 Rozsah stran s. 159-167 Poč.str. 9 s. Forma vydání Tištěná - P Akce Topical Problems of Fluid Mechanics 2022 Datum konání 16.02.2022 - 18.02.2022 Místo konání Prague Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova stratification ; immersed boundary ; algebraic turbulence model ; artifcial compressibility method Vědní obor RIV BA - Obecná matematika Obor OECD Pure mathematics CEP GA19-04243S GA ČR - Grantová agentura ČR Institucionální podpora MU-W - RVO:67985840 DOI 10.14311/TPFM.2022.022 Anotace This paper presents rst few results obtained using a newly developed test code aimed at validation and cross-comparison of turbulence models to be applied in environmental flows. A simple code based on nite di erence discretization is constructed to solve steady flows of incompresible non-homogeneous (variable denstity) fluids. For the rst tests a simple algebraic turbulence model was implemented, containing stability function depending on the stratification via the gradient Richardson number. Numerical tests were performed in order to explore the capabilities of the new code and to get some insight into its behavior under di erent stratification. The two-dimensional simulations were performed using immersed boundary method for the flow over low smooth hill. The resulting flow fields are compared for selected Richarson numbers ranging from stable up to unstable strati cation conditions. Pracoviště Matematický ústav Kontakt Jarmila Štruncová, struncova@math.cas.cz, library@math.cas.cz, Tel.: 222 090 757 Rok sběru 2023
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