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Effective thermal conductivity of metallic foams determined with the transient plane source technique

Fend, Thomas and Reutter, Oliver and Sauerhering, Jörg and S. do Couto Aktay, Kátia and Pitz-Paal, Robert and Angel, Stefanie (2005) Effective thermal conductivity of metallic foams determined with the transient plane source technique. In: Proceedings. 17th European Conference on Thermophysical Properties, 2005-09-05 - 2005-09-08, Bratzislava, Slovakia.

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Abstract

This article presents experimental results of thermal conductivity in metal foams. The thermal conductivity of cellular solids differs from those of their corresponding dense material. Therefore, the various pore size level effects contributing to the thermal conductivity are comprised by introducing an effective thermal conductivity. In this work we investigated metallic foams with a porosity ranging from 0.65 to 0.82 manufactured by the Slip Reaction Foam Sintering (SRFS) Process using a nickel-based powder. For the determination of the effective thermal conductivity at room temperature, we employed the Transient Plane Source Technique also known as Hot Disk. We verified the influence of the porosity and the thermal conductivity of the solid phase on the effective conductivity and compared the measured values of the effective conductivity with theoretical ones calculated using the thermal conductivity of the solid phase and the solid volume fraction. We present here a simple model that demonstrates the influence of the geometry of the grid elements qualitatively, discuss the applicability of the method to heterogeneous materials such as metallic foams and give an outlook about further investigations at higher temperatures.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Effective thermal conductivity of metallic foams determined with the transient plane source technique
Authors:
AuthorsInstitution or Email of Authors
Fend, ThomasUNSPECIFIED
Reutter, OliverUNSPECIFIED
Sauerhering, JörgUNSPECIFIED
S. do Couto Aktay, KátiaUniversität Stuttgart
Pitz-Paal, RobertUNSPECIFIED
Angel, StefanieRWTH Aachen
Date:5 September 2005
Journal or Publication Title:Proceedings
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
Vozár, L.UNSPECIFIED
Medved, I.UNSPECIFIED
Kubicár, L.UNSPECIFIED
Status:Published
Keywords:Thermal Conductivity Hot Disk Metal Foams
Event Title:17th European Conference on Thermophysical Properties
Event Location:Bratzislava, Slovakia
Event Type:international Conference
Event Dates:2005-09-05 - 2005-09-08
Organizer:Slovak Academy of Sciece, University of Pau, Constantine the Philosopher University
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Applikationsentwicklung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Deposited By: Dr.-Ing. Thomas Fend
Deposited On:04 Jan 2007
Last Modified:12 Dec 2013 20:22

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