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耗散格式
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  dissipation scheme
     Adaptive Delaunay Triangulation With Multidimensional Dissipation Scheme for High-Speed Compressible Flow Analysis
     用于高速可压缩流体分析的带多维耗散格式的自适应Delaunay三角剖分
短句来源
     Propagation of hydrogen-oxygen detonation wave in an abruptly expanding chamber and a gradually expanding chamber was simulated by solving the axisymmetrical Euler equations. The dispersion- control dissipation scheme (DCD) and a detailed chemical reaction kinetics model with 8 sections 20 reactions were adopted.
     采用二阶精度频散控制耗散格式(DCD)和8组分20个方程的基元反应模型,对轴对称变截面管道中氢氧爆轰波传播进行数值模拟。
短句来源
     The multidimensional dissipation scheme was developed and included in the upwinding algorithm for unstructured triangular meshes to improve the computed shock wave resolution.
     推导了多维耗散格式,并采用非结构化三角网格的迎风算法,改善了激波的计算结果.
短句来源
  “耗散格式”译为未确定词的双语例句
     Entropy Dissipating Scheme for Hyperbolic Systems of Conservation Laws in One Space Dimension
     一维守恒型方程(组)的熵耗散格式
短句来源
     Second-Order Entropy Dissipating Scheme for Scalar Conservation Law in One Space Dimension
     一维单个守恒型方程的二阶熵耗散格式
短句来源
     The Design of the Entropy Dissipator of the Entropy Dissipating Scheme for Scalar Conservation Law
     单个守恒型方程熵耗散格式中熵耗散函数的构造
短句来源
     In this paper, the chemically reacting flow-field induced by detonation waves propagation is simulated with CFD methods.
     本文应用基元反应模型和频散可控耗散格式(DCD)对氢氧爆轰波进行了二维数值模拟。
短句来源
  相似匹配句对
     Construction of Low Numerical Dissipation TVD Schemes
     低耗散TVD格式的构造
短句来源
     Numerical dissipation and dispersion of Hybrid Finite Analytic Method
     混合有限分析格式的数值耗散及频散
短句来源
     Patterns on "From X to Y"
     关于“从X到Y”格式
短句来源
     jpg file and.
     jpg格式和.
短句来源
     Quantum Mechanics in Dissipative Systems
     耗散系统的量子力学
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  dissipation scheme
With the help of a simple technique, the capability of the Jameson-Schmidt-Turkel numerical dissipation scheme has been enhanced to include hypersonic flows.
      
Due to the linear nature of the solutions with respect to x, a first order scalar dissipation scheme was used.
      
Figure 13 shows the results without applying a vorticity con nement, using the CUSP dissipation scheme.
      


A method based on the idea of nesting grid for the solution of hyperbolic partial diffe-rential equations using finite difference techniques is presented. Based upon the stability theoryin [1], the stability conditions of nesting grid methods are obtained, and convenient stabilitycriteria for a wide class of finite difference schemes are given. Computational results are pre-sented and comparisons are made with other methods.

本文讨论用套网格(Nesting grid)有限差分方法求解一阶双曲方程初边值问题,即在不同的区域做不同的网格剖分,选用相同或不同精度的差分格式.这种方法亦称杂交法(Hybrid Difference Method)或混合型差分方法(Mixed Difference Method),它广泛应用于数值天气预报和流体力学数值计算中,特别,对于局部区域上的解,其梯度变化激烈,而在其余区域上解的梯度变化平稳时,选用这种方法更有优越性。 [5,8,10]是套网格差分格式稳定性方面的工作,上述工作均以Kreiss定理为基础,针对两层显式耗散格式讨论,因而不便于应用,本文旨在利用GKS理论,寻求一般形式套网格差分格式稳定性的判别条件,§1针对模型问题建立套网格差分格式的一般形式,并介绍GKS理论的一种变形;§2建立套网格差分格式稳定性判别条件;§3是对一类差分格式和网格条件给出易于检验的稳定性判别准则;§4推广了Ciment匹配定理,并证明§3中的主要结果,最后§5是数值例子, 本文采用[1],[3]的符号。

The NND scheme presented by Prof.Zhang Han Xin of CARDC has been used in this paper to complete the following computa-tions: the two-dimensional inviscid flow around the symmetric plane of nosetip of space shuttle; the three-dimensional inviscid flow around the nosetip of space shuttle; the three-dimensional inviscid flow around axisymmetric indented body. Under the general coordinate system, the computation grids have been generated by algebra equations. The charac-teristic compatibitity equations have been...

The NND scheme presented by Prof.Zhang Han Xin of CARDC has been used in this paper to complete the following computa-tions: the two-dimensional inviscid flow around the symmetric plane of nosetip of space shuttle; the three-dimensional inviscid flow around the nosetip of space shuttle; the three-dimensional inviscid flow around axisymmetric indented body. Under the general coordinate system, the computation grids have been generated by algebra equations. The charac-teristic compatibitity equations have been used to treat the shock and body surface boundaries and there is a special treatment in translation of coordinate system. At last, the comparative computations have been completed using second order SCM scheme. The results of computation illustrate that the NND scheme used in this paper can avoid numerical oscillations and high resolution to shock-capturing.

本文采用气动中心张涵信教授提出的无波动、无自由参数耗散格式(NND)进行了如下的计算:航天飞机头部段对称剖面内的二维无粘绕流;航天飞机头部段三维无粘绕流;轴对称凹陷外形的三维无粘绕流。在物面坐标系下,用代数方程生成计算网格,利用特征相容关系式处理激波和物面边界。为了比较,还用SCM格式进行了计算。结果表明,本文所采用的NND格式,在捕捉流场内激波时不会出现非物理振荡,其收敛速度和所获得的计算结果都是令人满意的。

In this paper a fourth -oder dissipation exponent- type scheme of one -sided approximation for solving convective diffusion equations is derived. The theoretical results on the stability and the properties of one -sided approximation and fourth -oder dissipation of this scheme have been presented. The relations of this scheme and finite analytic method is also obtained. Some numerical examples are qiven.

本文构造了一种带权的六点格式,讨论了它的稳定性条件,证明了这种格式的解对微分方程的真解具有单侧逼近的性质;当适当选取权数θ=θ_0时,这种格式是一种四阶耗散格式,不仅数值耗散很小,而且满足稳定性条件,不出现非物理振荡;还证明了C.J.Chen的有限分析格式在一定条件下是这种带权格式的一个特殊情形,因此也具有单侧逼近性质;最后给出了几个算例说明上述性质。

 
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