water-mass continuity

By the continuity equation and the momentum equation for an ideal incompressible fluid, this essay derives the fundamental equations of surface water wave and works out an analytical solution under the condition of small-amplitude via the linear approximation theory.

利用理想不可压缩流体的连续性方程和动量方程，推导了表面波基本方程，并应用线性近似理论求出了小振幅波情况下的解析解。

The Equation of Continuity in Water-turbine on Half-orthogonal Curve Coordinate System

半正交曲线座标系下水轮机连续性方程的建立

The model couples continuity equation, momentum equation and species conservation equations. Net water transport flux in the membrane is considered as a boundary condition.

模型耦合了连续方程、动量方程和组分守恒方程，并将质子膜中的净水迁移通量作为边界条件之一来处理。

In this paper. the Euler equation and equation of continuity of water movement are linearized on the basis of the small disturbance principle, then the undulatory equation is solved.

本文通过对水流运动的欧拉（Eulcr）方程和连续方程按小扰动原理进行线性化处理，然后求其波动方程的解。

Based on the continuity equation of ground water and the variation principle, the seepage differential equation can be acquired.

根据地下水的连续方程和变分原理建立渗流场微分方程。