数值方程

By using a finite volume method to solve the Navier-Stokes equations, twodimensional vibrating cascade flow was computed.

采用有限体积法求解Navier-Stokes方程，完成了二维振动叶栅流动数值模拟。

Considering the fuel salt flow effect of the molten salt reactor, the neutron dynamic model was derived based on the particle conservation equations, and the critical problem was calculated by numerical method under three working conditions to study the flow effect to effective multiplication factor, fast neutron, thermal neutron and delayed neutron precursors distribution.

考虑新概念熔盐堆燃料盐的流动特性，从基本的粒子守恒方程出发，推导了熔盐堆的中子动力学模型，并采用数值方法对3种工况下熔盐堆的临界问题进行计算，考察流动对有效增殖系数、快中子分布、热中子分布及缓发中子先驱核分布的影响。

In the cylindrical coordinates, the related basic formula and solve method of the equivalent boundary element method were established and derived, and a new contact element was introduced to model the hybrid of structure and soil.

同时建立并推导了在柱体坐标系下插入式大圆柱壳墩式结构的等效边界元数值分析的相关基本方程和求解方法，并提出了一种新的接触面单元以模拟结构和土体间不同材料的耦合关系。

In the third parts, by using high accurate methods and HPF parallel computing, the N-S equations under cylindrical coordinates are used to simulate space developing compressible axisymmetric jet.

第三部分采用高精度的差分格式求解柱坐标下的三维N—s方程，利用HPF并行算法对空间发展的可压缩轴对称射流进行直接数值模拟。

Stability is one of the b asic problems f or numerical solution of wave equations.

稳定性问题是数值求解波动方程的基本问题。

In this paper the shallow water equations in the Lagrangian coordinate s were derived and the numerical solutions were found out for shallow water problem with moving boundary by using a 2 order Godunov scheme.

移动边界问题是水力计算中难点之一，本文用拉格朗日坐标系来描述浅水方程，并用二阶Godunov算法求解有移动边界的浅水问题的数值解。

In this paper the shallow water equations in the Lagrangian coordinates were derived and the numerical solutions were found out for shallow water problem with moving boundary by using a 2 order Godunov scheme.

移动边界问题是水力计算中难点之一，本文用拉格朗日坐标系来描述浅水方程，并用二阶Godunov算法求解有移动边界的浅水问题的数值解。

The author systematically studies the construction principle of high order accuracy difference scheme and uses third-order accuracy Godunov scheme with TVD property to solve three-dimensional viscous flow field in cascade.

为了减少网格畸变对数值解的影响，发展了一种微分方程法与代数法相结合的网格生成方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。