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Variation of apparent viscosity of silicone oils in microchannels depending on materials
MEKIDELAWIT GIRMA,MIKYUNG LIM,SEUNG SEOB LEE,HYOUNGSOO KIM 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
We compare two different approaches to study the effect of microchannel materials on the apparent viscosity of silicone oils and glycerol-water solutions. One is measuring the pressure drop to compute theoretical apparent viscosity of the test liquids in PDMS, glass and steel microchannels. The other is direct measurement of the apparent viscosity on different materials using rheometer. In both experiments, we found that, the apparent viscosity of silicone oils on PDMS channels is higher than glass and steel channels by 9.1%. Whereas the apparent viscosity of glycerolwater mixture, shows a variation of 3.2% on PDMS channels compare to other material. The results suggest that the apparent viscosity of liquids like silicone oils can be affected by channel materials.