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

Result code in 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>

Alternative codes found

RIV/68407700:21110/17:00312621

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Article name in the collection

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

ISBN

978-0-7354-1538-6

ISSN

0094-243X

e-ISSN

—

Number of pages

4

Pages from-to

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Publisher name

AIP Publishing

Place of publication

Melville, NY

Event location

Rhodes

Event date

Sep 19, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000410159800275