Record number :
100103
Title of article :
Effect of surface asperity truncation on thermal contact conductance
Author/Authors :
F.H.، Milanez, نويسنده , , M.M.، Yovanovich, نويسنده , , J.R.، Culham, نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
-47
From page :
48
To page :
0
Abstract :
This paper presents studies on thermal contact conductance at light contact loads. Surface profilometry measurements are presented which show that actual surface asperity height distributions are not perfectly Gaussian. The highest asperities are truncated, causing existing thermal contact conductance models to underpredict experimental data. These observations have been incorporated into modifications of existing contact conductance models. The truncation leads to an enhancement of thermal contact conductance at light contact pressures. The preliminary model has been compared against thermal contact conductance data presented in the open literature, and good agreement is observed. The results show that the truncation is a function of the roughness level: the rougher the surface, the more truncated the surface height distribution.
Keywords :
natural convection , Analytical and numerical techniques , heat transfer
Journal title :
IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES
Journal title :
IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES
Serial Year :
2003
Link To Document :
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