Numerical Modelling of Turbulent Flow over Three Dimensional Backward Facing Step

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F06%3A00122060" target="_blank" >RIV/68407700:21220/06:00122060 - 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

Numerical Modelling of Turbulent Flow over Three Dimensional Backward Facing Step

Popis výsledku v původním jazyce

The work deals with numerical modelling of 3D steady turbulent flow over backward facing step in a channel of rectangular cross-section. Two geometries with different boundary conditions and Reynolds numbers are computed. The mathematical model is basedon Reynolds averaged Navier-Stokes equations for incompressible fluid. The turbulence models are eddy viscosity (SST) and explicit algebraic Reynolds stress model (EARSM). The Navier-Stokes equations are solved by an implicit artificial compressibility method with higher order upwind dicretization for convective term. The influence of constitutive relation for Reynolds stress is observed. The differences caused by turbulence modeling are apparent already in the inlet straight channel in the form of corner secondary vortices captured only by EARSM model. The vortical structures downstream of the step were observed as well. The results are compared with measurements.

Název v anglickém jazyce

Numerical Modelling of Turbulent Flow over Three Dimensional Backward Facing Step

Popis výsledku anglicky

The work deals with numerical modelling of 3D steady turbulent flow over backward facing step in a channel of rectangular cross-section. Two geometries with different boundary conditions and Reynolds numbers are computed. The mathematical model is basedon Reynolds averaged Navier-Stokes equations for incompressible fluid. The turbulence models are eddy viscosity (SST) and explicit algebraic Reynolds stress model (EARSM). The Navier-Stokes equations are solved by an implicit artificial compressibility method with higher order upwind dicretization for convective term. The influence of constitutive relation for Reynolds stress is observed. The differences caused by turbulence modeling are apparent already in the inlet straight channel in the form of corner secondary vortices captured only by EARSM model. The vortical structures downstream of the step were observed as well. The results are compared with measurements.

Druh

D - Stať ve sborníku

CEP obor

BA - Obecná matematika

OECD FORD obor

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Projekt

<a href="/cs/project/GA201%2F05%2F0005" target="_blank" >GA201/05/0005: Matematická teorie a numerická simulace problémů mechaniky tekutin</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

CMFF'06 Conference Proceedings

ISBN

963-420-872-X

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

Budapest University of Technology and Economics, Department of Fluid Mechanics

Místo vydání

Budapest

Místo konání akce

Budapest

Datum konání akce

6. 9. 2006

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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