Abstract
We focus attention on the qualitative evaluations of the bio-fluid flow in micro-channel taken surface friction force into account. Lateral force mode of SPM (Scanning Probe Microscopy) was used for measuring surface friction force with nN scale order accurately. On the other hand, conventional hydrodynamic pressure drop measurement was carried out for measuring macro flow behavior of the flow. Results of Bio-fluid flow on hydrophobic surface by pressure drop measurements show 7% reduction of pipe friction coefficient. These measurements have sufficient reliability due to accurate measurement apparatus and samples. The error of the measurement was 3.9% with 95% comprehension. We think that the 7% reduction was occurred due to surface chemical, electrical or physical interaction. These results show interactions between flow and surface molecules highly influence on macro continuum flow.
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