【摘要】 MEMS系统的飞速发展让人们对微尺度领域的研究产生了极大的兴趣。对压力驱动下蒸馏水流过直径20μm微管道的流量-压力、流速-压力特性进行了数值模拟研究。结果表明,在该仿真条件下,蒸馏水的流动规律基本符合宏观条件下的Navier-Stokes和Hagen-Poiseuille方程。在仿真研究中还考虑了重力对流动特性的影响,结果发现,在微米尺度下,重力对流动的流量与速度的影响很小,几乎可以忽略不计。更多还原

【Abstract】 Advances in fabrication methods in microelectromechanical systems(MEMS) have generated significant interest in the area of microscale heat transfer and fluid flow.In this paper,The model of water flow through the microtube with diamter 20μm has been builded. The flow charactertics by different Pressure-driven has been researched and analyzed the pressure-mass flow rate and pressure-velocity relationship.Numerical simulations showed good agreement with the Navier-Stokes and Hagen-Poiseuille equation.The results also showed that gravity had hardly effect on flow charactertics in microscale and nearly can be neglected.更多还原