Turbulence Forcing Scheme In Physical Space Bassed On Ornstein-Uhlenbeck Process

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F10%3APU88852" target="_blank" >RIV/00216305:26210/10:PU88852 - 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

Turbulence Forcing Scheme In Physical Space Bassed On Ornstein-Uhlenbeck Process

Popis výsledku v původním jazyce

New turbulence forcing scheme is introduced in this work. This scheme operates in physical space. The main idea of this scheme is generating a force in every time step of simulation in particular points in the computational domain and this force is thanadded to momentum equations. The force is generated using Ornstein-Uhlenbeck stochastic process. The main feature of this process is that the force generated in next time step is not independent on the previous value (the Ornstein-Uhlenbeck is so calledMarkov process). So there is a correlation in the history of the generated force. It is suitable to use this force for generating turbulence because of this correlation. The developed forcing scheme was tested on the case of turbulent channel flow. Method for solution was Large Eddy Simulation with subgrid kinetic energy subgrid model. The results presented in this work are for low Reynolds number channel flow. For this case are the results in a good agreement with DNS data.

Název v anglickém jazyce

Turbulence Forcing Scheme In Physical Space Bassed On Ornstein-Uhlenbeck Process

Popis výsledku anglicky

New turbulence forcing scheme is introduced in this work. This scheme operates in physical space. The main idea of this scheme is generating a force in every time step of simulation in particular points in the computational domain and this force is thanadded to momentum equations. The force is generated using Ornstein-Uhlenbeck stochastic process. The main feature of this process is that the force generated in next time step is not independent on the previous value (the Ornstein-Uhlenbeck is so calledMarkov process). So there is a correlation in the history of the generated force. It is suitable to use this force for generating turbulence because of this correlation. The developed forcing scheme was tested on the case of turbulent channel flow. Method for solution was Large Eddy Simulation with subgrid kinetic energy subgrid model. The results presented in this work are for low Reynolds number channel flow. For this case are the results in a good agreement with DNS data.

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

CFD 2010

ISBN

978-989-96778-0-7

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

564-564

Název nakladatele

Eccomas

Místo vydání

Lisabon

Místo konání akce

Lisabon

Datum konání akce

14. 6. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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