Fluid Regimes in Nanochannels -- Understanding Nanoscale Surface Effects
讲座名称：
Fluid Regimes in Nanochannels -- Understanding Nanoscale Surface Effects
讲座时间：
2009-11-06
讲座人：
Zhigang Li
形式：
校区：
兴庆校区
实践学分：
讲座内容：
In nanoscale fluidic systems, the surface area-to-volume ratio is high and the surface plays an important role in understanding the dynamics of confined fluids. The surface roughness affects the fluid motion through microparameters, such as fluid-surface binding energy. These microparameters are directly associated with macroparameters, including the temperature and external driving force. The coupling of these parameters at different scales determines the flow regimes in the nanoscale.
In this talk, a general picture of how surfaces affect the motion of fluid molecules is given and a dimensionless number is proposed for characterizing fluid motion in nanoconfinements. By studying the fluid dynamics of force driven flows between parallel plates, we show, through molecular dynamics simulation, that the fluid motion in nanochannels can be classified into different regimes, each of which is associated with a distinct mechanism. The mechanisms in different situations reveal the surface effects on the fluid dynamics.
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