After analyzing the mechanism of the sand entry of perforated well, based on the theory of linear elasticity and considering the effect of temperature-change stress and drag force of the fluid flow through porous medium, a new model for forecasting the sand production of perforated well is established.
针对此问题，分析了射孔完成井的油层出砂机理，以线弹性理论为基础，以Fairhurst推导得到的井眼周围应力分布表达式为依据，得出射孔孔眼周围的应力表达式及射孔孔眼壁上任意位置的周向有效应力表达式，同时考虑变温应力和流体渗流作用的拖曳力影响，建立了一种新的射孔完井出砂预测模型。
A numerical method for the solutions to two-phase viscous incompressible flow of fluid with moving interface is presented.
本文采用了等值面函数方法计算含有运动界面的不可压缩两相黏性流动问题。
Numerical results are presented to demonstrate the effectiveness of this method for simulating the viscous flow of fluid with the moving interface.
数值试验表明，Level Set方法对于含有运动界面的黏性流动问题的数值模拟是有效而且实用的。
The mechanism of Longitudinal crack formation has been studied in detail in the round ingot of low alloy structural steel from aspects of temperature, compositions and fluid flow.
从温度、成份、流股等方面对低合金结构钢圆锭纵裂纹形成的机理作了较为详细的研究，找出了控制圆锭纵裂纹的有效方法，对降低质量成本有所裨益。
In order to further improve the system design and to increase its performance, a deep understanding of the complicated fluid flow and heat transfer in the system components is necessary.
分析系统内的流体流动状况对于强化太阳热水系统中的对流传热过程、优化系统结构、提高系统热效率，进而指导太阳热水系统的工程设计具有非常重要的意义。
Then the non-steady operation state of the whole work-condition-changed CPL system is simulated by numerical calculation, which includes in flow and heat transfer characteristics of system components and working fluid.
CPL工况突变后所引发的不稳定特性是本论文研究的主要内容，对这种非稳态特性进行了全面的试验研究和理论分析。
First of all, in theory the valve, the flow of hydraulic engineering analysis and manipulation institutions, the calculated valve into the fluid resistance to the loss of Oil.
首先在理论上对该阀进行了流道液压工程学分析，建立该液压系统的数学模型，计算出该阀进回液油路的液阻损失的理论值。
Research to the relation between grain-size and bulk concentration make us believe that the hyperpycnal flow in flood season was not completely Newton fluid.
对黄河口异重流发育时期的粒度和体积比含沙量之间关系的探讨使我们有理由相信洪季的异重流并不完全是牛顿流体的性质。
A number of sensors in communication with the fluid flow passage and the throttling element are provided that communicate information from the sensors to a processor also contained within the regulation device.
和流体流量通道通信的多个传感器和节流元件被提供用以将来自传感器的信息传递给也在调节设备中的处理器。
An intelligent fluid flow regulation device that includes a pressure regulator within a fluid flow passage that has an associated throttling element moveable in the flow passage.
本发明涉及一种智能流体流量调节装置，其包括在流体流量通道中具有可移动相关节流元件的压力调节器。
In addition, plenty of experiment on three-way thermostatic valve of cooling system of lube oil in dynamical machines has been done on this laboratory bench, including the capacity of controlling temperature, the testing of fluid local resistance, seal of valve flow passage and hysteresis.
在该实验台上，对动力机械润滑油冷却系统三通自动温控阀进行了温度控制能力、流体局部阻力测定、流道密封性、滞后性等逐项实验研究。
The simulation and optimization of solution flow in the cup by computational fluid dynamics tool have been introduced in this paper.
本文对匀流板的形状和位置进行了计算机模拟和优化，并实际应用于喷镀装置中，取得了很好结果。
Working out the qusi-difference equation of the air-water turbulent two fluid flow, and building the discrete equation series by current difference equation, which is adapted to one-phase flow, multi-phase flow and chemical reaction, etc.
建立了不可压缩等温条件下的，一般形式的水气两相湍流的数学模型，并采用通用微分方程形式，建立了适合单相流，多相流，带化学反应流动的通用离散化方程组，并建立了加快收敛速度的SIMPE—IEM方法。
2Using CFD software FLUENT6.1, adopting MRF and Laminar-model to simulate separately the agitation flow field of non-Newtonian fluid (a mixture of glycerin and water) in aΦ200mm plexiglass stirred tank with different organizational impellers.
2选用CFD软件FLUENT6.1，采用多重参考系法及Laminar模型分别对安装有不同桨型组合叶片、槽径为Φ200mm的有机玻璃槽内的非牛顿流体的搅拌流场进行数值模拟。
Several dynamic problems relative with safe reliability of parachute recovery system of manned spacecraft are studied in this work. These problems consist of calculation of parachute inflation performance, modeling of parachute-payload multi-body system, modeling of parachute suspension system, modeling of fluid-structure interaction for parachute inflation, computation of flow around bluff bodies, and analysis of wake re-contact phenomenon.
本文围绕与载人飞船回收系统安全可靠性紧密相关的几个动力学问题进行了研究，包括：降落伞充气性能的计算、物伞多体系统的动力学建模、吊挂系统的建模、流固耦合充气模型的建模、非流线形物体的绕流计算及尾流再附现象的分析。
In describing the state of a fluid at any point along its flow, it is convenient to consider the stagnation state as a reference state.
在描述国家的流体在任何一点，沿其流，这是方便的考虑停滞状态作为参考状态。
The ports cooperate to form a generally vertical fluid flow path through each condensing chamber, by-passing the adjacent evaporating chambers.
这些开口相互配合形成一个连通各冷凝室、但与相邻蒸发室隔离的大致垂直的流体流道。
Level fluctuations, fluid mixed characteristics and the patterns of flow fluid are the crucial factors evaluated the feeding system.
熔池液面波动、流体混合和流场状况是衡量布流系统好坏的重要因素。
From the view of fluid dynamics, all of these processes are realized by the flow of gas-liquid two-phase.
从流体力学的角度看，这些作用都是通过气液两相流动来实现的。
During the derivation, it is assumed: the liquid phase is incompressible Newton fluid; there is no mass transfer between phases; it is homothermal and steady state flow; the flow rate of gas phase and that of the liquid phase are the same without the consideration of slippage effect; the density of gas phase and that of the liquid phase in the wellbore are constants; the mixed loss caused by inflow from wellbore is ignored.
在推导的过程中进行了如下假设：液相为不可压缩的牛顿流体；相间不存在传质；等温、稳态流动；不考虑滑脱效应，气相和液相的流速相同；井筒中气相、液相的密度为常数；忽略井壁入流引起的混合损失。