Abstract

Pressure drop through a porous material set in a circular tube was measured experimentally using air as a working fluid. A fiber was constructed by a thin copper wire (d_w=0.5mm). The porosity ε was from 0.98 to 0.999 and Reynolds number from 2000 to 1500. Usually, the characteristic length of porous material is wire diameter or particle diameter. However, in porous material with high porosity the hydraulic length including tube wall and porous material was proposed as a characteristic length in place of wire diameter.

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