The results obtained are analysised and compared to experimental results referred to . according to the partial linearization theory of oscillating fluid mechanics and theory of fourier transform , the flow - induced vibration of pipe on offshore platform is studied 应用振动流体力学中的局部线性化理论及傅立叶变换理论(傅立叶级数及离散傅立叶反变换) ，对海洋平台输液管道内流流体激振进行研究。
A new force suddenly rises , the computational fluid dynamics , as the organic union of classic fluid mechanics , numerical computation methods and computer science , develops to become the efficient means of both science research and engineering design 作为经典的流体力学、数值计算方法和计算机技术三者的有机结合体，计算流体力学异军突起，得到不断发展和壮大，成为科学研究和工程设计的有效手段。
The universal principle of mass conservation is introduced into porous media fluid mechanics followed by obtaining the general form of the mass conservation equation which used for oil - gas or oil - water percolation and media - deformed rocks is verified 摘要将普遍的守恒原理引入了多孔介质流体力学中，得到了质量守恒方程的一般表达式，并用油气、油水两相渗流和变形介质中岩石固相的质量守恒方程进行验证。
The singular ordinary differential equations arise in the fields of gas dynamics , newtonian fluid mechanics , nuclear physics , the theory of boundary layer , nonlinear optics and so on . therefore , it has been considered extensively 而奇异微分方程是微分方程领域中一个重要的研究课题，由于它不断出现在各种应用学科中，例如：核物理、气体动力学、流体力学、边界层理论、非线性光学等，所以得到了广泛而深入的研究
Within the framework of two - phase flow theory , an analysis is carried out based on the momentum and continuity equations of fluid mechanics . corresponding to the physical process of the interaction of the solid and fluid phase , a perturbation analysis is systematically developed 还引用了两相流理论中从低浓度两相流中固相和液相的相互作用着眼,引入摄动分析的理论,并通过动量方程直接得出了悬移质泥沙浓度分布规律的方法。
Some valuable parameters have been supplied for songshenlol well during the actual operations . the paper includes the theories and technologies that related with drilling , machinery , fluid mechanics and automatization , etc . the solutions for these problems not only provide beneficial e 人的进论和相关技术，为国内t ， ’ i井等行业的同类装置提供了有益经验和可供借鉴成果，其关键技术的突破，对相关领域的理论、工艺、技术的发展具有积极推动作用和应用价值。
Research on current rush to interception air - mass in delivery pipeline system and water hammer with gas is a branch of concurrent gas - liquid flow . for it refers to many fields , such as fluid mechanics , transient flow , concurrent gas - liquid flow and thermodynamics , the problem is very complicate , and there are still some issues to be deeply studied actually 输水管道系统水流冲击截留气团与含气水锤研究属于气液两相流的一个分支，该问题涉及到瞬变流、空化、气液两相流和热力学等多领域的理论，因而该问题十分复杂，有必要进行深入研究。
So by this method , we can test the water content of the raw cement slurry through testing the velocity of the detector , it is certainly that it can test other slurry , such as paper slurry , mud slurry , mine slurry ctc . the fluid mechanics charactoristic of the slurry is complex , therefore it is difficult to establish the two - dimension or three - dimension mathematical modle to decide the relationship between the water content and the revolving speed of the detector . so the research for rotational detector in this topic is through the method of proper regressive analysis of experimental datas to establish the relation among the water content , the palse and the voltage 料浆的流体力学性能是复杂的，要想通过建立二维或三维的仿锥形旋转式检测头在料浆中旋转的流体力学数学模型，来确定料浆水分含量与检测头的转速关系是十分困难的，甚至是不可能的，因此本课题对于旋转式检测头的研究，是通过对实验数据进行多元线性回归的处理方法，建立起水分含量与红外线对管输出的脉冲数p及电源电压之间的关系。
Abstract : the effective width model based on the surface topography of natural fracture , which is closely related to the mechanical and hydraulic characteristics , is established on the theories of fluid mechanics and oil / gas flow in porous media . the study aims at improvingformation damage control and temporary plugging technology for fractured reservoir 文摘:在考虑裂缝表面的实际微观形态的情况下，采用流体力学与渗流力学相结合的方法，提出了可为裂缝性储层保护实施暂堵技术提供定量依据的有效宽度数学模型。
