MICROCOSMIC BOUND THEOREM OF DAYCY＇S LAW AND ITS APPLICATION

By combining Chapman-Enskog expansion with the BGK approximation to Baltzmann equation and Navier-Stokes equation was obtained. And an expression of Darcy‘ s law was obtained through taking variable average over Navier-Stokes equation on some representative space in porous media, and finally an example was taken to prove its reliability.     

GENERAL SECOND ORDER FLUID FLOW IN A PIPE

ＧＥＮＥＲＡＬＳＥＣＯＮＤＯＲＤＥＲＦＬＵＩＤＦＬＯＷＩＮＡＰＩＰＥＨｅＧｕａｎｇｙｕ（何光渝）（ＤｅｐａｒｔｍｅｎｔｏｆＰｅｔｒｏｌｅｕｍＥｎｇｉｎｅｅｒｉｎｇ，Ｘｉ＇ａｎＰｅｔｒｏｌｅｕｍＩｎｓｔｉｔｕｔｅ，Ｘｉ＇ａｎ７１００６１，Ｐ．Ｒ．Ｃｈｉ...     

含水层中对流-扩散传热问题

自七十年代初,世界上一些国家(如美国,法国和瑞士等)相继开展了地下含水层储热储冷的研究工作.我国广泛地进行"冬灌夏用"地下水的现场实验,积累了丰富的地下储冷经验.但都需要从理论上回答诸如含水层的温度 ...     

ANALYTICAL SOLUTIONS FOR EQUATIONS OF UNSTEADY FLOW OF NON-NEWTONIAN FLUIDS IN TUBE

This paper presents analytical solutions to the partial differential equations forunsteady flow of the second-order fluid and Maxwell fluid in tube by using the integraltransform method.It can be used to analyse the behaviour of axial velocity and shear stressfor unsteady flow of non-Newtonian visco-elastic fluids in tube,and to provide a theoreticalbase for the projection of pipe-line engineering.     

ANALYTICAL SOLUTION OF PARTIAL DIFFERENTIAL EQUATIONS FOR RADIAL TRANSPORT OF A SOLUTE IN DOUBLE POROUS MEDIA

The mathematical model for radial transport of a solute is summed up in this paper.The action of non-equilibrium linear adsorption,the double property of porous media andthe decay of solute are considered.With the first kind of boundary condition,one finds theanalytical solution of these equations by Laplace transform and calculates thedimensionless solution by FORTRAN program with DJS-040.The distribution and changeof solute are evaluated and the solution under various limit cases is given.By numericalanalysis,one obtains some valuable conclusions.     

An analytical solution and analysis of characters for viscoelastic fluid flow in annular pipe

I.Introducti0nLuiCiqunandHuangJunqiI'I(l989),ZhuWeihuiandLuiCiquri1'l(l992)sequentiallystudiedtheaxialflowofsecondorderandMaxwellfluidsandanalyzedtheflowcharactersofthesefluids.Thispaperwillstudyunsteadyrotat0ryflowofsecondorderandMaxwellfluidsinannularpi…     

边部注水时裂缝性油藏中水平井两相渗流

本文在流线不变的假定下研究边部注水时裂缝性油藏中水平井两相渗流问题,建立了双重孔隙介质中水平井两相流体垂直二维渗流的数学模型,并用特征线方法进行了精确求解,给出了裂缝系统和岩块系统中的饱和度分布以及水平井见水时间公式,从而为边部注水开发裂缝性油藏提供了必要的理论基础和工程计算方法。     

多重介质渗流研究进展

从已发现的油气田来看,裂缝性油气田通常都是大油气田,其储量很大,单井产量每天数百吨到上万吨不等,经济价值极高。油、气、水在裂缝性孔隙介质中的流动特征与一般孔隙介质的特征有本质上的差异:各重介质问液量交换性,多重介质的非均质性以及各向异性等.因此,研究多重介质渗流有较大的理论和实际意义。      

双筒流变仪中粘弹性流体的解析解及运动特性分析

求得二阶流体和Maxwell流体在环管内不定常旋转运动问题的解析解.据此可以分析环管内旋转速度和切应力分布与变化特征.流体的物性常数、管道环隙大小等参数在解析公式中有明确反映,便于分析与讨论.本解可以用来分析类似的工程流动问题,尤其更具有针对性的是分析双筒流变仪中流动特征与应力状态,确定材料的粘弹性参数.通过计算,发现当外筒作简谐振动时,Maxwell流的速度和切应力变化曲线上有突变结,突变结上振幅和相位都发生突变.当外筒匀速旋转时,Maxwell流体的速度和切应力变化曲线分别呈斜方波和锯齿波形状.振动周期与材料常数H_a二次曲线相关.     

EXACT SOLUTION OF UNSTEADY AXISYMMETRICAL TWO-DIMENSIONAL FLOW THROUGH TRIPLE POROUS MEDIA

This paper seeks for the line source and cylindrical planesource solutions of unsteady axisymmetrical two-dimensionalflow through infinite and finite reservoirs with triple po-rosity.They not only reveal the essential characteristicsof fractured reservoirs but also generalize and develop theexisting primal results of homogeneous and porous media.Ref.[1]gives the line source solution of unsteady axi-symmetrical two-dimensional flow in infinite reservoir withdouble porosity;in this paper we study the problem of flowthrough triple porous media.