流体传质方程【Mass Transfer Equation】

流体传质方程

Equation of Continuity for Species $\alpha$ in terms of $\pmb j_\alpha$

控制方程表达通式：

$$\rho \dfrac {D w_\alpha}{Dt}=-\nabla \cdot \pmb j_\alpha + r_\alpha$$

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1.直角坐标系($x, y, z$)

直角坐标系Cartesian coordinates ($\textit { x,y,z }$):	NO.
ρ(∂wα∂t+vx∂wα∂x+vy∂wα∂y+vz∂wα∂