Influence of the cavity geometry on the heat transfer conditions inside highly perforated bricks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F17%3A00479497" target="_blank" >RIV/68378297:_____/17:00479497 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/17:00312621

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4992444" target="_blank" >http://dx.doi.org/10.1063/1.4992444</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4992444" target="_blank" >10.1063/1.4992444</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the cavity geometry on the heat transfer conditions inside highly perforated bricks

Popis výsledku v původním jazyce

Heat transfer conditions inside a segment of highly perforated bricks are investigated in the paper. The main objective of the presented analysis is to quantify the influence of the cavity geometry and orientation on the equivalent thermal conductivity of the segment. Five cavities with the same area but different shape are assumed. The calculations are performed by finite element method, while the steady-state two-dimensional heat transfer is assumed. Considering the generalized heat-conduction model, radiative heat fluxes on the cavity surface are quantified based on view factors determined using the cross-string method. Calculated radiative heat fluxes are explicitly added to the surface cavity nodes. Then, after convergence of the temperature field, equivalent thermal conductivity of the segment can be expressed. The results show that circle-shaped cavity exhibits the lowest radiative heat transfer but the lowest equivalent thermal conductivity is obtained when triangle cavities are assumed. The radiative heat transfer is found significant for all analyzed cavities, it can account for more than 30 % of the overall heat transfer.

Název v anglickém jazyce

Influence of the cavity geometry on the heat transfer conditions inside highly perforated bricks

Popis výsledku anglicky

Heat transfer conditions inside a segment of highly perforated bricks are investigated in the paper. The main objective of the presented analysis is to quantify the influence of the cavity geometry and orientation on the equivalent thermal conductivity of the segment. Five cavities with the same area but different shape are assumed. The calculations are performed by finite element method, while the steady-state two-dimensional heat transfer is assumed. Considering the generalized heat-conduction model, radiative heat fluxes on the cavity surface are quantified based on view factors determined using the cross-string method. Calculated radiative heat fluxes are explicitly added to the surface cavity nodes. Then, after convergence of the temperature field, equivalent thermal conductivity of the segment can be expressed. The results show that circle-shaped cavity exhibits the lowest radiative heat transfer but the lowest equivalent thermal conductivity is obtained when triangle cavities are assumed. The radiative heat transfer is found significant for all analyzed cavities, it can account for more than 30 % of the overall heat transfer.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the International Conference of Numerical Analysis and Applied Mathematics (ICNAAM 2016)

ISBN

978-0-7354-1538-6

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Rhodes

Datum konání akce

19. 9. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000410159800275