A thermal conductivity prediction model for porous building blocks

被引：5
|
作者：
Van De Walle, Wouter [1 ]
Janssen, Hans [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Civil Engn, Bldg Phys Sect, Kasteelpk Arenberg 40 Bus 02447, B-3001 Heverlee, Leuven, Belgium
来源：
Bauphysik | 2016年 / 38卷 / 06期
关键词：
MICROSTRUCTURE; RADIATION; CONCRETE; FOAMS;
D O I：
10.1002/bapi.201610037
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A 3D model for the prediction of the effective thermal conductivity of porous building blocks is introduced. Simulations are performed directly on the microstructure using voxel images and the finite element technique. Very good agreement with analytical solutions is achieved. The model is used to investigate the miscalculation effect of 2D simulations, clearly indicating the need for a 3D model. Furthermore, a method for incorporating radiative heat transfer at the microscale is implemented and applied on a synthetic sample, demonstrating the influence of thermal radiation on the effective thermal conductivity.
引用
收藏
页码：340 / 347
页数：8
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