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Flow characteristics of silicon oil in nanochannels

Journal of Hydrodynamics 2021年第6期33卷 1282-1290页

作者： Yong Wang Fu-quan Song Kai Ji Ye-heng Sun Wei-yao Zhu Xiao-hong Wang School of Engineering Science University of Science and Technology of ChinaHefei 230026China School of Petrochemical and Energy Engineering Zhejiang Ocean UniversityZhoushan 316022China Exploration and development scientific research institute of Shengli oil field branch of Sinopec Dongying 257015China Civil and Resource Engineering School University of Science and Technology BeijingBeijing 100083China

The nonlinear flow of liquids through nanoscale channels play an important role in the separation and purification properties of porous membranes,the manufacture of biofilm ionic channels and microfluidic chips,the production of micro electro-mechanical *** oil flow experiments were conducted through anodic alumina films with pore sizes of 26,67,89,and 124 nm,in which flow mechanism and characteristics of the oil through the nanoscale channels were *** nanoflow features are revealed:(1)The experimental flow rate is less than the theoretical flow rate through nanochannels,as solid-liquid interaction increasing flow resistance.(2)At small shear rate,the boundary layer is one,indicating existence of a threshold pressure of oil flow through nanochannels.(3)The boundary layer decreases with the increasing of shear rate,and it rapidly decreases as shear rate increases when the value of shear rate is small.(4)The drag coefficient decreases nonlinearly with increasing shear rate,decreasing more slowly when value of shear rate is big,and trending towards 1 in the case of large shear *** is shown that the non-linearity of flow is induced by great solid-liquid interaction in nano and microscale,and increasing the driving force can raise the efficiency at the nanometer scale.

关键词： nano and microflow nanofluid threshold pressure the boundary layer tight reservoir

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