New Inlet Boundary Condition Treatment for Large Eddy Simulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F10%3APU88853" target="_blank" >RIV/00216305:26210/10:PU88853 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

New Inlet Boundary Condition Treatment for Large Eddy Simulation

Popis výsledku v původním jazyce

This work describes new treatment of inlet boundary condition for Large Eddy Simulation. The turbulence on the inlet is forced by generation of the force in particular points of the computational domain and this force is added to the momentum equations as a source term. For the generation of the force is used Ornstein-Uhlenbeck process. Ornstein-Uhlenbeck process describes the distribution of velocity fluctuations in homogeneous turbulence flow. Instead of generating random velocity fluctuations which would lead to continuity error the Ornstein-Uhlenbeck process is used here for generating the forcing force. This approach allows easy implementation in solvers of turbulent flows. This proposed inlet boundary condition was implemented in Large Eddy Simulation solver in open-source program OpenFOAM and then used for simulation of channel flow. The results are validated against DNS data. The results obtained with proposed forcing show good agreement with DNS results. The part of this work

Název v anglickém jazyce

New Inlet Boundary Condition Treatment for Large Eddy Simulation

Popis výsledku anglicky

This work describes new treatment of inlet boundary condition for Large Eddy Simulation. The turbulence on the inlet is forced by generation of the force in particular points of the computational domain and this force is added to the momentum equations as a source term. For the generation of the force is used Ornstein-Uhlenbeck process. Ornstein-Uhlenbeck process describes the distribution of velocity fluctuations in homogeneous turbulence flow. Instead of generating random velocity fluctuations which would lead to continuity error the Ornstein-Uhlenbeck process is used here for generating the forcing force. This approach allows easy implementation in solvers of turbulent flows. This proposed inlet boundary condition was implemented in Large Eddy Simulation solver in open-source program OpenFOAM and then used for simulation of channel flow. The results are validated against DNS data. The results obtained with proposed forcing show good agreement with DNS results. The part of this work

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F08%2F0096" target="_blank" >GA101/08/0096: Moderní metoda Large Eddy Simulation pro řešení dvoufázového turbulentního proudění a kapalný stěnový film</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Colloquium Fluid Dynamics 2010

ISBN

978-80-87012-27-7

ISSN

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e-ISSN

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Počet stran výsledku

43

Strana od-do

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Název nakladatele

Institute of thermomechanics, AS CR

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

20. 10. 2010

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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