突然起动无限长平板的流场动量输运分析

The momentum transfer in the upper fluid zone overa suddenly moved infinite long plat

以修正的牛顿内摩擦定律为基础,建立了瞬态动量方程. 用拉普拉斯变换法对无限长平板突然起动的动态流场进行了求解,求得瞬态过程的动量、动量流分布函数. 结果表明了速度、动量流输运的波动机制.

Based on the modified Newton inner friction law with the relaxation time, the momentum equation of fluid is built. Laplace transform method is applied to solve the momentum equation for the upper fluid zone over an infinite long plate subject to be suddenly moved. The distribution solutions of the velocity and momentum flux are obtained. The results show that the momentum waves do exist in the upper fluid zone over the suddenly moved infinite long plate.