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).
上面那个是欧拉框架下的偏导数，U为关于x,y,z,t的函数 下面这个是拉格朗日下对速度的倒数，其中U为t的函数
http://dyfluid.com/docs/theory.html 公式35 and 36
