Experimental verification of boundary conditions for numerical simulation of airflow in a benchmark ventilation channel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU121781" target="_blank" >RIV/00216305:26210/16:PU121781 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.epj-conferences.org/articles/epjconf/pdf/2016/09/epjconf_efm2016_02067.pdf" target="_blank" >http://www.epj-conferences.org/articles/epjconf/pdf/2016/09/epjconf_efm2016_02067.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/201611402067" target="_blank" >10.1051/epjconf/201611402067</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental verification of boundary conditions for numerical simulation of airflow in a benchmark ventilation channel

Popis výsledku v původním jazyce

Correct definition of boundary conditions is crucial for the appropriate simulation of a flow. It is a common practice that simulation of sufficiently long upstream entrance section is performed instead of experimental investigation of the actual conditions at the boundary of the examined area, in the case that the measurement is either impossible or extremely demanding. We focused on the case of a benchmark channel with ventilation outlet, which models a regular automotive ventilation system. At first, measurements of air velocity and turbulence intensity were performed at the boundary of the examined area, i.e. in the rectangular channel 272.5 mm upstream the ventilation outlet. Then, the experimentally acquired results were compared with results obtained by numerical simulation of further upstream entrance section defined according to generally approved theoretical suggestions. The comparison showed that despite the simple geometry and general agreement of average axial velocity, certain difference was found in the shape of the velocity profile. The difference was attributed to the simplifications of the numerical model and the isotropic turbulence assumption of the used turbulence model. The appropriate recommendations were stated for the future work.

Název v anglickém jazyce

Experimental verification of boundary conditions for numerical simulation of airflow in a benchmark ventilation channel

Popis výsledku anglicky

Correct definition of boundary conditions is crucial for the appropriate simulation of a flow. It is a common practice that simulation of sufficiently long upstream entrance section is performed instead of experimental investigation of the actual conditions at the boundary of the examined area, in the case that the measurement is either impossible or extremely demanding. We focused on the case of a benchmark channel with ventilation outlet, which models a regular automotive ventilation system. At first, measurements of air velocity and turbulence intensity were performed at the boundary of the examined area, i.e. in the rectangular channel 272.5 mm upstream the ventilation outlet. Then, the experimentally acquired results were compared with results obtained by numerical simulation of further upstream entrance section defined according to generally approved theoretical suggestions. The comparison showed that despite the simple geometry and general agreement of average axial velocity, certain difference was found in the shape of the velocity profile. The difference was attributed to the simplifications of the numerical model and the isotropic turbulence assumption of the used turbulence model. The appropriate recommendations were stated for the future work.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

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

—

ISSN

2100-014X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

1-4

Název nakladatele

EDP Sciences

Místo vydání

Neuveden

Místo konání akce

Praha

Datum konání akce

17. 11. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000400395300069