* Differentia| Equation of Mass Conservation(连续方程 +v(p)=0V(p)=0 t dttov. V=0 V·=0 Differential Equation of Linear Momentum(动量方程) 二维定常不可压* Differential Equation of Mass Conservation(连续方程) ( ) 0 V t    +   =  + V = 0 dt d     = ( ) 0 V V = 0  •Differential Equation of Linear Momentum(动量方程) 二维定常不可压