| 1. | Condition of mass flow continuity
质量流动连续条件 |
| 2. | We establish equations based on the darcy theory and incompressible - flow continuity - equation
根据darcy定律和不可压缩流体连续性方程建立树脂流动控制方程。 |
| 3. | The growing and collapsing of gas bubbles and cavitation not only damage the flow continuity and reduce the working mediums physical performance , but also influence the propagation of pressure pulsation
气泡和气穴的产生及破灭不仅破坏了流体的连续性、降低了介质的物理特性,而且还会影响压力脉动波的传播过程。 |
| 4. | Two methods are used in the paper . one is element - method modeling based on the flow continuity equation and force balance equation . the other is simulating with amesim , an advanced modeling and simulating software of hydraulic system
仿真采用的主要方法是以流量连续方程和力平衡方程为基础采用部件法建模，并应用高级液压系统建模仿真软件amesim进行了仿真验证。 |
| 5. | According to two - dimension flow continuity , momentum equations , suspended sand diffusion equations and two - phase flow bed sand motion equations , hydraulic - dynamics sediment accumulation mathematical model between two impounding dams was set up by adopting the methods of weighting and concentrating masses
根据二维水流连续、运动方程、悬沙扩散方程和两相流底沙运动方程，采用加权集中质量剖分方法，建立了蓄水两坝间水动力、泥沙淤积数学模型。 |
| 6. | The theory of minimum entropy production or minimum rate of energy dissipation shows that a river is stable when it is in a relative equilibrium condition . ( 3 ) the river facies formulas of alluvial river have been developed using the theory of minimum rate of energy dissipation together with flow continuity and motion equations , suspended load transport or bed load transport equation . ( 4 ) the causes of the river patterns are explained using the theory of minimum rate of energy dissipation
（ 3 ）基于最小能耗率原理，以水流能耗率作为目标函数，以水流连续方程、水流运动方程及悬移质挟沙力公式或推移质输沙率公式作为约束条件，通过对目标函数求条件极值，分别推导出以悬移质造床为主的显式河相关系式和以推移质造床为主的显式河相关系式。 |
| 7. | It has a long history using a throttle device to measure the flow volume of fluid in pipe the method has formed normalization at home and abroad the principle is to make the flow bunch form the particial shrink at the place where the throttle part is located so as to produce a static pressure difference then measure and calculate the flow volume at the moment when the fluid is flowing through the throttle device by the static pressure measured this method is based on the law of conservation of energy and the equation of flow continuity
用节流装置测量管道中流体流量已历史悠久，在国内、国际上都已标准化，其原理是使流束在节流件处形成局部收缩，产生静压力差，通过测量静压力差来衡量流体流过节流装置时的流量大小，这种测量方法是以能量守恒定律和流动连续性方程为基础的。 |
