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对不同长度及不同数量的高分子链在微直通道及微缩通道中的流动进行了模拟与分析.研究表明,高分子链的伸展状态与微通道的形状密切相关,微直通道中高分子链能较充分地伸展,方形微缩通道中高分子链未能充分伸展,而斜坡微缩通道中高分子链的伸展状态介于微直通道与方形微缩通道之间.高分子的存在对微通道系统的温度没有明显影响,对密度与水平流动速度有较明显的影响.高分子链的运动直接影响到周围的简单流体粒子,降低其周围流体粒子的流动速度,对密度与速度产生局部扰动,形成“拖曳”现象.高分子链分布越密集,长度越长,高分子链的拖曳现象越明显.
The simulation and analysis of the flow of polymer chains with different length and number in the micro-channel and micro-channel are carried out. The results show that the extension of the polymer chain is closely related to the shape of the microchannel, In the microchannels, the extension of macromolecule chains in the microchannels is not as obvious as that in the microfluidic channels Impact on the density and horizontal flow rate has a more significant impact.Metal chain movement directly affects the surrounding simple fluid particles, reducing the flow of particles around the fluid velocity, the density and velocity of local disturbance, the formation of “drag ”Phenomenon.More intensive polymer chain distribution, the longer the length, the more obvious the polymer chain drag phenomenon.