期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 46, 期 25, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/46/25/255302
关键词
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资金
- National 111 Project of China [B06024]
- National Basic Research Program of China [2011CB610305]
- Major International Joint Research Program of China [11120101002]
- National Natural Science Foundation of China [51206128]
We present a simplistic yet accurate analytical model for the effective thermal conductivity of high porosity open-cell metal foams saturated in a low conducting fluid (air). The model is derived analytically based on a realistic representative unit cell (a tetrakaidecahedron) under the assumption of one-dimensional heat conduction along highly tortuous-conducting ligaments at high porosity ranges (epsilon >= 0.9). Good agreement with existing experimental data suggests that heat conduction along highly conducting and tortuous ligaments predominantly defines the effective thermal conductivity of open-cell metal foams with negligible conduction in parallel through the fluid phase.
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