A refined finite element analysis on the thermal conductivity of perforated hollow sphere structures

Fiedler, Thomas; Hosseini, Seyed Mohammad Hossein; Belova, Irina V.; Murch, Graeme E.; Öchsner, Andreas

doi:10.1016/j.commatsci.2009.08.007

Cited by 31 publications

(10 citation statements)

References 15 publications

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“…The algorithm is very simple to implement and no further complex meshing steps are needed. This meshing technique has been used on polymer, metal or ceramic cellular materials, mainly for the determination of Young's modulus and Poisson's ratio [37][38][39] , but also for the determination of the thermal conductivity of metal hollow sphere structures 40 or the influence of the oxidation of the nuclear graphite on mechanical properties (Fig. 8) 36 .…”

Section: A) Meshing With Cubic Elementsmentioning

confidence: 99%

Cellular solids studied by x-ray tomography and finite element modeling – a review

2013

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Section: A) Meshing With Cubic Elementsmentioning

confidence: 99%

Cellular solids studied by x-ray tomography and finite element modeling – a review

2013

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“…1d). The finite element analysis was carried out in the engineering analysis and simulation program MSC Marc [5][6][7]. With the aim to reduce the time required for specimen modeling, a Python application was written.…”

Section: Methodsmentioning

confidence: 99%

Effect of porosity and the ordered porous structure type on the mechanical properties of aluminum materials

Voronin¹,

Loboda²,

Lediaev³

2016

AIP Conference Proceedings

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“…The total heat flux _ Q Q is simply the sum of the single nodal heat fluxes through one of these surfaces. The influence of the thermal radiation on the effective thermal conductivity is neglected since its contribution is very low, especially for temperatures below 700 K [11,21,22]. Also the thermal convection is disregarded in order to reduce the complexity of the FE-analysis.…”

Section: Numerical Modellingmentioning

confidence: 99%

Thermal analysis of aluminium foam based on micro‐computed tomography

Veyhl¹,

Belova

Murch

et al. 2011

Materialwissenschaft Werkst

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Finite element analyses are performed in order to determine the effective thermal conductivity of closed-cell Alporasm foam and open-cell M-Porem sponge. The investigated finite element models are based on high resolution micro-computed tomography images. The complex structures of the real materials are very well represented with this method. The dependence between the computed effective thermal conductivities and relative density is approximated with analytical scaling laws and linear regression models. Calculations in three perpendicular directions aim towards the investigation of a possible anisotropy. Furthermore, different model sizes are considered in order to estimate the representative volume for the effective thermal conductivity. The findings of this paper indicate that a unit cell containing at least 3 cells in each direction or 27 cells in total is sufficiently large to determine the effective thermal conductivity of these cellular materials. Note that both Alporasm and M-Porem exhibit the same qualitative behaviour (i. e. a linearly increasing thermal conductivity with rising relative density) at different absolute levels. More precisely, Alporasm exhibits an approximately two times higher effective thermal conductivity than M-Porem.Keywords: aluminium foam / micro-computed tomography / finite element analysis / thermal conductivity / Mit Hilfe der Finiten Element Methode wurde die Wärmeleitfähigkeit von einem geschlossenzelligen Schaum Alporasm und offenzelligen Schaum M-Porem untersucht. Die verwendeten Berechnungsmodelle wurden mit hochauflösenden Computertomographiebildern erstellt und somit konnte die komplexe Struktur des realen Werkstoffes sehr genau nachgebildet werden. Die Abhängigkeit zwischen der relativen Dichte und der berechneten Wärmeleitfähigkeit wurde mit dem Skalengesetz und einer linearen Regression beschrieben. Zusätzlich wurden die numerischen Berechnungen für drei zueinander senkrechte Raumrichtungen berechnet, um die Anisotropie des Werkstoffes zu bestimmen. Desweiteren wurde das repräsentative Volumen des Werkstoffes für die Wärmeleitfähigkeitsanalyse bestimmt, indem unterschiedliche Modelgrößen untersucht wurden. Diese Publikation zeigt, dass eine Einheitszelle mit 3 Zellen pro Kantenlänge oder 27 Zellen in der gesamten Einheitszelle für die Wärmeleitfähigkeitsberechnungen der untersuchten zellularen Werkstoffe ausreichend ist. Außerdem wurde ein qualitatives gleiches Verhalten mit quantitativen Unterschieden zwischen Alporasm und M-Porem festgestellt (i. e. linearer Anstieg der Wärmeleitfähigkeit mit steigender relativer Dichte). Genauer, Alporasm besitzt die doppelte Wärmeleitfähigkeit von M-Porem.

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A refined finite element analysis on the thermal conductivity of perforated hollow sphere structures

Cited by 31 publications

References 15 publications

Cellular solids studied by x-ray tomography and finite element modeling – a review

Cellular solids studied by x-ray tomography and finite element modeling – a review

Effect of porosity and the ordered porous structure type on the mechanical properties of aluminum materials

Thermal analysis of aluminium foam based on micro‐computed tomography

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