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1 Bulletin of the Polish Academy of Sciences. Earth Sciences

1 2000

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The influence of channel tortuousity on hydraulic resistance

Cieślicki K., Lasowska A., Smolarski A.

Bulletin of the Polish Academy of Sciences. Earth Sciences

2000

Vol. 48, nr 2

161-173

The results of investigations concerning the tortuousity of pore channels are presented. Although the tortuousity factor is present in the famous Kozeny-Carman formula, its determination in empirical way is difficult. A variable shape tube of the constant cross-section represents the most simple tortuousity model. The relation between the exactly defined channel tortuousity and the overall hydraulic resistance was determined experimentally. Investigations were carried out applying a collection of multiple-bend and coiled tube models. It was observed that centrifugal effects related to channel tortuousity give rise to hydrodynamic phenomena represented by the non-linear correction term to the well known Darcy's law involving 3/2 exponent in flow rate.