渗流

Considering that rock's permeability is exponential function along with formation pressure and starting from nonDarcy percolation theory of gas at high speed, this paper derives a new pseudo pressure binominal exponential deliverability equation and its solution method.

在考虑岩石渗透率随地层压力呈指数函数变化的基础上，从气体的高速非达西渗流理论出发，推导出新的拟压力二项式产能方程及其求解方法。

Based on the principle of variation, boundary value problem of pressure partial differential equation was transformed into the extreme value problem of fonctionelle and finite element equation of flow model was deduced for calculating the simulation result.

根据变分原理，将压力微分方程的边值问题转化为泛函的极值问题，建立了渗流模型的有限元方程。

In the course of its production, condensate petroleum system is accompanied with complex facies change during formation filtration.

凝析气藏作为一种特殊的复杂气藏，在开采过程中，凝析油气体系在地层渗流过程中伴随著复杂的相变。

Calculation models of seepage flow analysis of rock fissure are systematically studied.

系统研究了裂隙岩体渗流分析的各类计算模型。

Multi-component foam drive ; fluid flow ; flowing mechanism ; mathematical model ; numerical simulation

多元泡沫化学剂；复合驱油；流体流动；渗流机理；数学模型；数值模拟

This provides the instruction for precise control of the micro fluidic caused by electroosmotic flow.

结论对电渗流驱动微流体的精确操控具有技术参考意义。

Based on the mechanisms of foam flow in porous media, a new parameter of foam comprehensive value was employed to evaluate foamers, which denoted the comprehensive characteristic of foamer's foaming ability and stability.

论文根据氮气泡沫渗流机理，提出将反映起泡剂起泡能力和稳定性的综合性能的泡沫综合值作为主要参数，用于氮气泡沫调驱用起泡剂的筛选。

Seepage ; finite element method ; free surface ; variable seepage coefficient method ; fixed grid

渗流；有限元；自由面；改变渗透系数法；固定网格

The finite element formulae of this problem are obtained from Galerkin's method.

以大坂山隧道为例考察了渗流和保温层对隧道围岩冻深的影响规律。

Remove row and column' and 'put a big number' have been used for the first boundary;a continuous Regional Identification Function is used on the basis of non-variant nodal virtual flux method for the free surface boundary;Gauss formula is used to make the curved surface integral of the free surface boundary transformed as the difference between volumn integral and other curved surface integral to calculate the integral item on boundaries, which avoiding finding the position of free surface, while the continuous Regional Identification Function is applied to calculate volumn integral and surface integral;Crout and PCG method is used for solusion.

对于已知水头边界，采用"去行去列法"和"置大数法"进行处理；对于自由面穿过的单元，在固定网格节点虚流量法的基础上，引入连续的区域识别函数；对于非稳定渗流中自由面边界积分项，采用高斯公式将求自由面的面积分转化为求体积分与其他面积分之差，避免了求自由面的具体位置，同时在计算体积分和面积分时采用连续的区域识别函数；在解法上，采用直接解法和PCG法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。