大连理工大学学报2012，Vol.52Issue(3)：343-349,7.
水平通道内黏性指进现象LBM模拟
LBM simulation of viscous fingering phenomenon in a horizontal channel
摘要
Abstract
The viscous fingering phenomenon occurring in immiscible displacement in a horizontal channel is focused on by using the lattice Boltzmann method （LBM）. The gravity is considered by imposing perpendicularly to the fluid flowing direction. The role of the viscosity ratio between displaced fluid and displacing fluid and surface wettability are analyzed by comparing the final finger pattern and discussing the displacement efficiency in terms of two parameters, the breakthrough time and areal sweep efficiency. The analytical results reveal that under the effect of gravity, the finger pattern is unsymmetrical to the central line of the channel, and the increasing of viscosity ratio of immiscible fluid enhances the finger growth; as a result, the displacement efficiency decreases. Besides, the influende of surface wettability on the fluid behavior is also studied with consideration of gravity, and it is found out that the finger growth is enhanced when the channel surface is non-wetting for displacing fluid, and the finger formation is suspended when the channel surface is wetting for displacing fluid.关键词
黏性指进/非混相流体/表面可润湿性/黏度比Key words
viscous fingering/immiscible fluids/surface wettability/viscosity ratio分类
能源科技引用本文复制引用
李维仲,董波,宋永臣..水平通道内黏性指进现象LBM模拟[J].大连理工大学学报,2012,52(3):343-349,7.基金项目
国家自然科学基金资助项目（50976017 （）
50736001） （）
