Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F12%3APU95126" target="_blank" >RIV/00216305:26210/12:PU95126 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26210/11:PU95126

Výsledek na webu

<a href="http://www.epj-conferences.org/efm" target="_blank" >http://www.epj-conferences.org/efm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/20122501099" target="_blank" >10.1051/epjconf/20122501099</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

Popis výsledku v původním jazyce

The impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large Eddy Simulation. The inappropriate specification of the inlet velocity has significant effect on the downstream flow pattern. The case of backward-facing step was used as a test case. Three different approaches of the inlet boundary conditions were studied: uniform velocity profile, mean velocity profile of the fully developed channel flow and velocity obtained from mapping velocity from plane positioned behind the inlet back to the inlet. The results of the simulations were compared with experimental results. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results.

Název v anglickém jazyce

Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

Popis výsledku anglicky

The impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large Eddy Simulation. The inappropriate specification of the inlet velocity has significant effect on the downstream flow pattern. The case of backward-facing step was used as a test case. Three different approaches of the inlet boundary conditions were studied: uniform velocity profile, mean velocity profile of the fully developed channel flow and velocity obtained from mapping velocity from plane positioned behind the inlet back to the inlet. The results of the simulations were compared with experimental results. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results.

Druh

D - Stať ve sborníku

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

—

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPJ Web of Conferences

ISBN

978-80-7372-784-0

ISSN

2100-014X

e-ISSN

—

Počet stran výsledku

5

Strana od-do

485-489

Název nakladatele

E D P SCIENCES

Místo vydání

Neuveden

Místo konání akce

Jičín

Datum konání akce

22. 11. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000304449600099