Detail publikace
Large Eddy Simulation: subgrid-scale models
VOLAVÝ, J. FORMAN, M. JÍCHA, M.
Český název
Large Eddy Simulation: subgrid-scale models
Anglický název
Large Eddy Simulation: subgrid-scale models
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Subgrid modelling in Large Eddy Simulation is proposed and analysed. The main idea of Large Eddy Simulation is to separate the eddies containing large energy from small dissipative eddies (scales). The large eddies are solved explicitly, the small ones are modelled. For modelling of these smallest scales so called subgrid-scale models are used. The paper contains a short description of the most used subgrid-scale models, particularly Smagorinsky model, dynamic Smagorinsky model, subgrid kinetic energy model, dynamic subgrid kinetic energy model and mixed model. These models are consequently tested on the case of a turbulent channel flow. The calculations are performed using an open-source code OpenFOAM. The results are compared with the DNS data.
Český abstrakt
Práce je zaměřena na modelování subgridní oblasti pro metodu Large Eddy Simulation. Hlavní myšlenka této metody spočívá v separaci energii obsahujících vírů od malých disipativních vírů. Velké víry jsou řešeny expilicitně, zatímco malé jsou modelovány. Pro modelování účinků malých víru se používaji tzv. subgridní modely. Článek obsahuje stručný popis nejpouživanějších modelů a tyto modely jsou následovně použity pro simulaci proudění tekutiny kanálem. Výpočty probíhají v programu OpenFOAM.
Anglický abstrakt
Subgrid modelling in Large Eddy Simulation is proposed and analysed. The main idea of Large Eddy Simulation is to separate the eddies containing large energy from small dissipative eddies (scales). The large eddies are solved explicitly, the small ones are modelled. For modelling of these smallest scales so called subgrid-scale models are used. The paper contains a short description of the most used subgrid-scale models, particularly Smagorinsky model, dynamic Smagorinsky model, subgrid kinetic energy model, dynamic subgrid kinetic energy model and mixed model. These models are consequently tested on the case of a turbulent channel flow. The calculations are performed using an open-source code OpenFOAM. The results are compared with the DNS data.
Klíčová slova česky
Large Eddy Simulation, subgridní modely, proudění kanálem
Klíčová slova anglicky
Large Eddy Simulation, subgrid-scale models, channel flow
Rok RIV
2011
Vydáno
01.11.2011
Nakladatel
Institute of Thermomechanics AS CR
Místo
Praha
ISSN
0001-7043
Ročník
2011
Číslo
3
Strany od–do
271–280
Počet stran
10
BIBTEX
@article{BUT75172,
author="Jaroslav {Volavý} and Matěj {Forman} and Miroslav {Jícha},
title="Large Eddy Simulation: subgrid-scale models",
year="2011",
volume="2011",
number="3",
month="November",
pages="271--280",
publisher="Institute of Thermomechanics AS CR",
address="Praha",
issn="0001-7043"
}