A Theoretical Calculation of Thermal Conductivity of Sillica Aeogel

Paper number

IAC-09.C2.8.10

Author

Mr. Yao Xian-zhou, China

Coauthor

Dr. Zi-Jun Hu, China

Year

2009

Abstract

Abstract    
One regular model which is a cubic array of intersecting square rods similar to actual microstructure of sillica aerogel is presented to evaluate the effects of nanostructure of the SiO\small 2 aerogel on the thermal properties. Steady gas-solid coupling thermal conduction of one dimension in micro-model cell is analyzed. The calculated value of the effective thermal conductivity is 0.011 W/ m•K close to the experimental value which is 0.012W/(m•K). At the same time, the result shows that pore diameter distribution of material, especially macropore and micropore, has an important influence on its thermal conductivity. 


Key words   SiO\small 2 aerogel  effective   thermal conductivity   theoretical model
 

Abstract document

IAC-09.C2.8.10.pdf

Manuscript document

IAC-09.C2.8.10.pdf (🔒 authorized access only).

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