微管道内液体低速流动的实验研究微管道内液体低速流动的实验研究.pdf

International Journal of Mechanics Research 力学研究, 2015, 4(4), 89-95 Published Online December 2015 in Hans. /journal/ijm /10.12677/ijm.2015.44011 Experimental Study on Liquid Flow in Microtubes under Low Velocity Condition 1 2* 1 1 1 Liang Sun , Pengfei Hao , Xiaoqi Wang , Xu Jin , Jianming Li 1 Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 2 School of Aerospace, Tsinghua University, Beijing th th th Received: Dec. 8 , 2015; accepted: Dec. 26 , 2015; published: Dec. 29 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract The research on the liquid flow at micro-scale is of great significance to develop low permeability oil/gas reservoirs at high efficiency. In this paper, the flow characteristics of de-ionized water andn-Hexadecane flowing through quartz microtubes with inner diameter of 18.5 μm, 9.6 μmand 4.1μmwere investigated in experiments. The experimental results show that the pressure drop has linear relationship with average velocity of the fluid in the microtubes. The experimental fric- tion factor is consistent with the classical laminar flow theory when the flow velocity ranges in 0.01 mm/s - 1 mm/s, which indicates that the influence of the stationary boundary layer could be neglected when the diameter of the microtube exceeds 4 μm. The nonlinear Darcy phenomenon that the flow resistance increases as the reduction of flow rate and the obvious phenomenon of the startin