FLOW FRICTION CHARACTERISTICS OF ALUMINUM FOAM MATRIXES

in International Symposium (oral presentation paper), 國際研討會(全文口頭發表)
標題FLOW FRICTION CHARACTERISTICS OF ALUMINUM FOAM MATRIXES
出版類型國際研討會(全文口頭發表)
出版年度2004
AuthorsWei Te Wu(Benny), 吳瑋特
出版日期Jul 11 2004 12:0
會議地點Charlotte, North Carolina, U.S.A.
其他編號0000
中文摘要

A universal correlation of friction characteristic was
developed based on the measured pressure drop of air through
foam matrixes. The pressure drops of seven types of aluminum
foams with different porosities and pore densities were
measured. The Reynolds number based on the equivalent
spherical diameter of the foam ranged from 32.05 to 1289.32. The
range of porosity was 0.87~0.958. A universal empirical equation
was developed to correlate the dimensionless pressure drop
with the dimensionless flow velocity for all seven types of
aluminum foams. The empirical correlation agreed well with
experimental data. According to the empirical correlation and the
measured data, the pressure drop introduced by foam matrixes
was found to be much lower than that by granular matrixes at
the same Reynolds number. The relationship between the
friction factor and Re of foam matrixes is found to follow the
trend of granular matrixes and can be classified into four
regimes: Darcy-flow, inertial-flow, unsteady laminar-flow, and
unsteady- and chaotic-flow regimes.

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