Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
个人建议去看一下北大吴望一老师的流体力学第一章,看了之后推导这类方程简直小菜一碟