流体力学

In addition, we note that the Newton limit of the relativistic hydrodynamics equations is the classical compressible fluid Euler equations system. This is one of the motives that we research the relativistic hydrodynamics equations.

此外，我们注意到相对论流体力学方程组的Newton极限即为经典的可压缩流体力学Euler方程组，这也是我们研究相对论流体力学方程组的动机之一。

It is a branch of fluid mechanics.

粘性流体力学是研究粘性流体运动规律的学科，是流体力学学科的重要分支。

Computational fluid mechanics is an important course in the field of fluid mechanics at the contemporary era.

计算流体力学是当代流体力学领域的一门重要课程。

The use of hydrodynamics in mines is introduced,and expound the significance of hydrodynamics.

叙述了流体力学在煤矿中的应用，阐述了流体力学的重要性。

As the development of hydromechanics and the computer science,the optimized design method of ship lines based on the theory of hydromechanics has gradually become practical.

随着船舶流体力学理论的不断进步，计算机技术的飞跃发展，基于流体力学理论的船体线型最优化设计已经被欧美、日本、韩国等造船技术先进的国家用于实际的船型设计中，而我国目前的船舶设计部门仍主要采用传统的经验设计法来进行船体线型设计。

Hydrodynamics and magnetohydrodynamics have wide applications in astrophysics.

流体力学和磁流体力学在天体物理中的应用是十分广泛的。

The mathematical model is dispersed by finite-volume method and the dispersed equations are solved by SIMPLER algorithm. This is the first time to solve a problem of drilling fluid mechanics with the numerical method of Newtonian fluid mechanics.

5首次将牛顿流体力学经常采用的数值方法用于钻井流体力学的研究中：用有限体积法离散钻井液流动和传热的数学模型，用Simpler算法求解该数学模型的离散化方程。

Based on computational fluid dynamics and turbulence model , a numerical study of the turbulent flow field of the metal rotameter is conducted to investigate the mechanism of metal rotameter.

为深入研究金属管浮子流量计的工作机理，采用计算流体力学和流体力学中湍流模式理论，对金属管流量计流场进行了数值仿真研究，获得了低黏度流体介质中浮子受力及浮子在受力平衡下的流量。

A brief introduction is given for the conventional unsolved problems of fluid dynamic field as well as a detailed description of the approaches about the scalar field theory.

对流体力学的当前研究热点问题给予了简单论述，对标量的计算模式的发展和计算流体力学在塔板上的应用的情况进行了较详细的论述。

Using fluid dynamics FEM (two dimensional, three dimensional andaxisymmetric) and three dimensional acoustic FEM in meticulous analysis ofexpansion muffler structure, this paper studies the influences of each mufflercomponents' position, dimension, form and quantity on the fluid dynamic andacoustic performances;therefore the paper indicates that the end of the intruding tubeis the linchpin of the fluid dynamic performance of the whole muffler structure, thespringhead of muffler fluid dynamic performance is the smoothness of air current, themain factor which affects the acoustic attenuation value of expansion chamber muffleris the grade of saltation of the section of air conducting access, and the attenuationvalue of specific frequency can be dramatically enhanced by carefully designing thelength of expansion chamber.

本文通过流体力学有限元方法和三维声学有限元方法对扩张腔消声结构的参数化模型进行了细致的分析，研究了这种结构的各个组成部份的位置、大小、形状和数量对其流体力学与声学性能的影响，指出插入管端口是影响整个结构流体力学性能的关键，消声结构流体力学性能的根源是气流通过时的平稳程度；影响扩张腔消声量的主要因素为声波传播通路截面突变的程度，并可以通过精细的设计扩张腔轴向长度获得宽频或指定频率消声量的大幅度提高。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。