Mixed Convective Heat Transfer with Surface Radiation in a Vertical Channel in Presence of Heat Spreader

2020 ◽  
pp. 53-61
Author(s):  
S. K. Mandal ◽  
Arnab Deb ◽  
Dipak Sen
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Vertical Channel ◽  
Surface Radiation ◽  
Heat Spreader

Convective heat transfer with chemical transformations in a vertical channel

2011 ◽  
Vol 58 (6) ◽  
pp. 513-518 ◽  
Author(s):  
D. G. Grigoruk ◽  
P. S. Kondratenko ◽  
D. V. Nikol’skii ◽  
M. E. Chizhov
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Vertical Channel ◽  
Chemical Transformations

Thermal Behavior of Nominally Flat Silicon-Based Heat Spreaders

2005 ◽  
Vol 128 (4) ◽  
pp. 370-379
Author(s):  
Ta-Wei Lin ◽  
Ming-Chang Wu ◽  
Cheng-Hsien Peng ◽  
Po-Li Chen ◽  
Ying-Huei Hung
Keyword(s):  
Heat Transfer ◽  
Surface Roughness ◽  
Thermal Resistance ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Heat Spreader ◽  
Heat Spreaders ◽  
Silicon Based ◽  
Maximum Thermal Resistance ◽  
Effect Of Surface

Thermal characteristics for a horizontal heated chip mounted with three types of nominally flat silicon-based heat spreaders have been systematically investigated. They include the natural convective and radiative heat transfer from the top surface of the heat spreaders to the external ambient, external thermal resistance, and maximum overall thermal resistance. In the aspect of natural convection, an axisymmetric bowl-shaped profile of local Nusselt number is achieved, and the highest convective heat transfer performance occurs at the location near the rim of the heat spreader. The effect of surface roughness on both local and average natural convective heat transfer behaviors from nominally flat silicon-based spreader surfaces to the external ambient is not significant. Two new generalized correlations of local and average Nusselt numbers for various heat spreader surfaces are presented. The contributions of convection and radiation on the total heat dissipated from the top surface of the heat spreader to the ambient are about 72% and 28%, respectively. The effect of surface roughness on external thermal resistance for nominally flat silicon-based surfaces is not significant. The influence of the conductive thermal resistance within the silicon-based heat spreader on the maximum thermal resistance is not significant. The maximum thermal resistance is mainly dominated by external thermal resistance for flat nominally silicon-based heat spreaders.

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