Analysis of the topography of microchannels with different sizes

The paper focuses on the detailed analysis of the profiles and the topographies of the samples. The roughness parameters in accordance with standard practice are calculated for ca. 1000 runs (profiles). The roughness parameters of the smaller microchannels are twofold higher than those of the largest microchannel investigated. The scattering of the roughness of the largest microchannel (D = 0.8 mm) is less and the cavities are smaller than those of the other ones (D = 0.4 and 0.5 mm). All surfaces investigated demonstrate a deterministic microstructure as for emery ground surfaces on smooth tubes in the literature.