层流

In the paper, the Level Set Method is applied to track the moving interface between two fluids and every phase is calculated respectively combined the interface effects. Finally, Sewage outfall problem is simulated by 2D and 3D system based the paper, and the process and mechanism of the saline intrusion is explained.

本文从两流体的角度，采用Level Set方法追踪两流体分层界面的运动，对每相流体分别求解，并考虑界面处两流体间的相互作用，模拟了污水排海等分层流问题，详细阐述了海水入侵过程和机理。

On the basis of the conservation equation of continuous medium and in combination with mechanics of fluid through porous media and the heat transfer theory in porous media, conservation equations in porous media (continuous equation, momentum equation and energy equation ) are derived, When constructing the downhole temperature model, heat transfer in a wellbore is considered as the heat transfer in a vertical tube, the flow in a wellbore considered as sufficiently parallel flow, heat transfer in injection zones considered as heat conduction and convection in porous media, the flow in injection zones considered as flow through porous media, heat transfer in adjacent rocks considered as heat conduction in porous media.

在建立井下温度场模型时，把井筒的传热看作是竖直圆管中传热问题，把井筒的流动看作是充分发展的层流流动；把注入层中的传热看作是多孔介质中导热和对流的传热问题，把注入层中的流动看作是渗流；把围岩中的传热看作是多孔介质中导热问题。

The formulas derived show that FAM is more accurate and reasonable than finite difference method and finite element method , also, on the element partial differentiation of dynamic Reynolds equations with respect to circumferential and axial direction is directly obtained by finite analytic solution.

本文在详细分析目前流体润滑轴承层流、紊流润滑理论及轴承-转子系统稳定性理论的基础上，提出了将有限分析法用于计算动压、静压、动静压轴承的静特性和动特性系数，并推导了相应的计算公式。

The flow fields around a prolate spheroid were investigated by numerical simulation and experiments when the flow is both in laminar state and in turbulent state.

本文利用数值模拟和实验方法研究了层流和湍流状态下绕椭球的流场，主要目的是探索复杂流动情况下的湍流计算方法。

In experimental research, structures of the skin friction lines appearing on a prolate spheroid in laminar and turbulent flows were investigated and compared by using an improved oil-flow visualisation technique.

在实验研究中，用改进的油流显示法研究和对比了层流和湍流状态下绕椭球流动的表面摩擦力线结构。

The effects of small grains set on the surface of prolate spheroid on SFL were also observed and analysed. In laminar flow, Re=1. 4×10〓, the shape of separation line is affected prominently by the nearby grains.

层流状态下，雷诺数为1.4×10〓时，分离线附近的颗粒状突起会显著影响分离线的形状，当雷诺数减为0.9×10〓时，颗粒对分离线只有微弱的影响。

Radiolarian abundance ; surface productivity ; trade wind ; Antarctic bottom water ; tropical Eastern Pacific ; Late Quaternary.

放射虫丰度；表层生产力；贸易风；南极底层流；热带东太平洋；晚第四纪。

Variations of radiolarian abundance, biogenic opal, organic carbon and grain size in this core indicate t...

该柱放射虫丰度、生源蛋白石和有机碳含量、粒度的分析显示，大约在氧同位素11、9～8.4、5～3和1期，高的放射虫总丰度、第四纪常见种丰度和始新世-渐新世种丰度大致对应于高的中值粒径和平均粒径，以及大约氧同位素5期以来增加的有机碳含量，表明此期间贸易风增强，搬运的陆源颗粒增大，北赤道洋流加强，导致上升流增强，表层水生产力提高，同时，南极底层流的活动也加强。

The results indicate that the separation and the reattachment occur in the Boundary-Layer of the main rocket because of the shock interaction.

数值结果表明在助推器激波的干扰下，芯级边界层流场明显出现了分离和再附过程。

Numerical simulations of laminar flow separation and reattachment occurred in an annular backstep passage are performed by the SIMPLER algorithm.

用SIMPLER算法对流过环形后台阶通道内的层流分离和再附着进行了数值模拟。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。