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| Effect of hydrophobic nanoparticles Si02 on flow characteristics in microchannel |
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DI Qin-feng1,2,LI Zhan-hua3,SHI Li-yi1,2,WU Fei1,2,GU Chun-yuan1,2,YU Zu-bin1,2
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(1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University，Shanghai 200072, China;2. Shanghai Key Laboratory of Mechanics in Energy and Environment Engineering，Shanghai 200072，China ;3. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China )
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| Abstract: |
| The mechanism of decompression and augmented injection with hydrophobic nanoparticles Si02 adsorbing method was studied based, on microchannel flow experiments. Due to the large ratio of surface area and volume in microscale flow， the properly of liquid-solid interface has a considerable effect on the flow. The flow characteristics experiment was done using ultrapure water through a capillary with inner diameter of near 25 |xm under the different boundary conditions of the microchannel wall. The results show that the flow rate of water was increased considerably due to the reduction of flowing resistance under the same pressure in the microchannel absorbed by oil based hydrophobic nanoparticles Si02. The wettability of microchannel wall was transformed from hydrophilicity into stronger hydrophobicity，then the slip effect appears and the flow resistance was reduced. |
| Key words: microchannel hydrophobic nanoparticles Si02 slip effect reduction of flowing resistance microflow experiment |
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