流体速度梯度形成过程的动力学分析  

Dynamic analysis on the formation of velocity gradient of adhesive fluid

作　　者：刘钧哲[1] 

机构地区：[1]沈阳工程学院能源与动力学院,沈阳110136

出　　处：《沈阳工程学院学报（自然科学版）》2013年第3期242-244,262,共4页Journal of Shenyang Institute of Engineering:Natural Science

摘　　要：针对现有文献对黏性流体内部速度梯度形成过程缺乏动力学分析的现状,基于现代物理学关于最小时间和最小长度理论,提出适用于经典力学范畴的最小薄膜和最小作用时间假设;对只受剪切力作用的黏性流体速度梯度的形成过程及其线性、非线性形态进行了动力学分析.结果表明:速度梯度的形成是从流体边界开始通过无数个最小薄膜的相互作用而发生发展的,并且这种发生发展是在无数个最小作用时间内依次完成的,与流体所受外力的种类并无本质联系,因而这种分析可以推广到流体受到压力与剪切力共同作用的一般情况.As the lack of dynamic analysis on velocity gradient of adhesive fluid,minimum thin film and action time assumption,based on minimum time and length theory from modern physics,were put forward.The formation of velocity gradient of adhesive fluid and its linear or non-linear shapes are analyzed.The results show that the occurrence and development of the velocity gradient started from the fluid boundary through the interaction of the countless minimum thin films,and the occurrence and development are completed sequentially in countless minimum action time.The essential cause of the velocity gradient is shearing force and viscosity,so this analysis can be used in fluid affected by stress and shearing force.

关 键 词：最小薄膜 最小作用时间 剪切力 动力学分析 

分 类 号：O357.1[理学—流体力学]