AustralieFrV1, Main, Exploration, bibRecord, 006D84

A predictive model for the thermal contact resistance at liquid-solid interfaces: Analytical developments and validation

Identifieur interne : 006D84 ( Main/Exploration ); précédent : 006D83; suivant : 006D85

A predictive model for the thermal contact resistance at liquid-solid interfaces: Analytical developments and validation

Auteurs : A. Hamasaiid [France, Australie] ; M. S. Dargusch [Australie] ; T. Loulou [France] ; G. Dour [France]

Source :

International journal of thermal sciences [ 1290-0729 ] ; 2011.

RBID : Pascal:11-0388255

Descripteurs français

Pascal (Inist)
- Résistance thermique contact, Méthode analytique, Topographie, Profilométrie, Rugosité, Structure interface, Couche interfaciale, Modèle structure, Coulée sous pression, Effet pression, Effet température, Interface liquide solide, Coulée sous haute pression.

English descriptors

KwdEn :
- Analytical method, Contact thermal resistance, High pressure die casting, Interface structure, Interfacial layer, Liquid solid interface, Pressure die casting, Pressure effects, Profilometry, Roughness, Structural models, Temperature effects, Topography.

Abstract

An analytical model has been developed to quantify and predict the Thermal Contact Resistance (TCR) at the liquid-solid interface. Contact topography and interface characteristics are included in the model through the inclusion of solid surface roughness parameters and the mean trapped air layer at the interface. In liquid-solid contact, air is often entrapped and compressed inside the microcavities of the solid surface roughness. The mean trapped air layer is determined from the mechanisms of contact at the liquid-solid interface. The proposed models determine the radius and the density of the micro-contact points for a given set of contact conditions. The density and the radius of contact spots have been integrated into a classical thermal flux tube theory in order to calculate the TCR at a liquid-solid interface. The models have been applied to the casting-die interface in High Pressure Die Casting. The calculated TCR is found to agree with the experimentally determined results.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">An analytical model has been developed to quantify and predict the Thermal Contact Resistance (TCR) at the liquid-solid interface. Contact topography and interface characteristics are included in the model through the inclusion of solid surface roughness parameters and the mean trapped air layer at the interface. In liquid-solid contact, air is often entrapped and compressed inside the microcavities of the solid surface roughness. The mean trapped air layer is determined from the mechanisms of contact at the liquid-solid interface. The proposed models determine the radius and the density of the micro-contact points for a given set of contact conditions. The density and the radius of contact spots have been integrated into a classical thermal flux tube theory in order to calculate the TCR at a liquid-solid interface. The models have been applied to the casting-die interface in High Pressure Die Casting. The calculated TCR is found to agree with the experimentally determined results.</div>
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A predictive model for the thermal contact resistance at liquid-solid interfaces: Analytical developments and validation

A predictive model for the thermal contact resistance at liquid-solid interfaces: Analytical developments and validation

Source :

Descripteurs français

English descriptors

Abstract

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