Heat conduction in closed-cell cellular metals

Matej Vesenjak (Avtor), Zoran Žunič (Avtor), Andreas Öchsner (Avtor), Matjaž Hriberšek (Avtor), Zoran Ren (Avtor)

Povzetek

The purpose of this research was to describe the thermal transport properties in closed-cell cellular metals. Influence of cell size variations with different pore gases has been investigated with transient computational simulations. Heat conduction through the base material and gas in pores (cavities) was considered, while the convection and radiation were neglected in the initial stage of this research. First, parametric analysis for definingthe proper mesh density and time step were carried out. Then, two-dimensional computational models of the cellular structure, consisting of the base material and the pore gas, have been solved using ANSYS CFX software within the framework of finite volume elements. The results have confirmed theexpectations that the majority of heat is being transferred through the metallic base material with almost negligible heat conduction through the gas in pores. The heat conduction in closed-cell cellular metals is therefore extremely depended on the relative density but almost insensitive regarding tothe gas inside the pore, unless the relative density is very low.

Ključne besede

prenos toplote;celični kovinski materiali;porozni materiali;zaprte celice;plinska polnila;računalniške simulacije;heat transfer;cellular metal materials;porous materials;closed cells;gas fillers;computational simulations;

Podatki

Jezik:	Angleški jezik
Leto izida:	2005
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	536.2:519.61/.64
COBISS:	9972502
ISSN:	0933-5137
Št. ogledov:	1972
Št. prenosov:	96
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	prenos toplote;celični kovinski materiali;porozni materiali;zaprte celice;plinska polnila;računalniške simulacije;
URN:	URN:SI:UM:
Strani:	str. 608-612
Letnik:	ǂVol. ǂ36
Zvezek:	ǂno. ǂ10
Čas izdaje:	Oct. 2005
ID:	8718333