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紧致格式     
相关语句
  compact scheme
     The Study on the Finite Volume Compact Scheme and the Boundary Treatment of the Compact Finite Difference Scheme
     关于有限容积紧致格式的研究和有限差分紧致格式的边界处理
短句来源
     The momentum equations are integrated in time using the four-stage explicit Jameson Runge-Kutta algorithm and discretized in space using fourth order accurate compact scheme as well as the pressure Poisson equation.
     动量方程的时间导数采用四步Jameson Runge-Kutta法,空间导数和压力Poisson方程均采用四阶高精度紧致格式
短句来源
     The pressure term is achieved via the solution of Poisson equation,and a new fourth-order finite volume compact scheme is used to discrete the pressure Poisson equation.
     压力项则由压力Poisson方程求得,并给出了新的压力Poisson方程的四阶精度有限容积紧致格式的离散表达式.
短句来源
     The pressure term is achieved by solving pressure Poisson equation,and a new fourth-order finite volume compact scheme is used to discrete the equation.
     压力项则由压力Poisson方程求得,并给出了新的压力Poisson方程的四阶精度有限容积紧致格式的离散表达式。
短句来源
     The properties of the three point fifth order generalized compact scheme are presented.
     详细分析了满足“抑制波动原则”和“稳定性原则”的五阶精度三点广义紧致格式的数值特性。
短句来源
更多       
  compact schemes
     Upwind Compact Schemes for Hamilton-Jacobi Equations
     迎风紧致格式求解Hamilton-Jacobi方程
短句来源
     Based on the close relationship between Hamilton-Jacobi(H-J) equations and hyperbolic conservation laws,a high-order numerical method is developed to solve the H-J equations in the 3rd order and 5th order compact schemes.
     基于Hamilton Jacobi(H J)方程和双曲型守恒律之间的关系,将三阶和五阶迎风紧致格式推广应用于求解H J方程,建立了高精度的H J方程求解方法.
短句来源
     This paper shows that the interior point dissipative parameter α could control the asymptotic stability of the dissipative compact schemes DCS3 & DCS5,the influence of the boundary schemes parameters α 1 & α 2is less important,the ranges of those parameters are suggested.
     本文进一步研究表明 :内点耗散参数α能够控制耗散紧致格式DCS3和DCS5的渐近稳定性 ,边界格式参数α1和α2 对以上格式的渐近稳定性的影响是次要的 ,并给出了这些参数的取值范围。
短句来源
     The improved and relax semi-implicit compact schemes are presented, based on the second-order modified Dennis scheme for the convection-diffusion equations.
     基于二阶修正Dennis格式 ,提出了采用时间相关法求解定常对流扩散方程的一种具有节省内存空间和提高定常解收敛速度的有理式型优化半隐和松驰半隐紧致格式 .
短句来源
     The high order linear dissipative compact schemes given in the reference 2 can restrain oscillations induced by high frequency waves well.
     文献 [2 ]提出的高阶精度线性耗散紧致格式 ,(DCS)能较好地抑制高波数振荡。
短句来源
更多       
  compact difference scheme
     3-order Precision Compact Difference Scheme and Application
     具有三阶精度的数值微分紧致格式及其应用
短句来源
     First, dispersive error of compact difference scheme is discussed;
     在具体格式分析过程中,讨论了紧致格式的色散误差及其各向异性特性;
短句来源
     The spatial evolution of 2-D disturbances in supersonic sharp cone boundary layers was investigated by direct numerical simulation(DNS) in high order compact difference scheme.
     采用高精度紧致格式,对超音速尖锥边界层中二维扰动的空间演化,进行了直接数值模拟.
短句来源
  strongly compact scheme
     This scheme has two-order accuracy in time,and combines weighted ENO scheme (r=3) and strongly compact scheme to treat convection term in N-S equation and the right terms of the discrete equation. Besides,four-order accurate strongly compact scheme is used to calculate viscosity term of N-S equation.
     该格式在时间上具有二阶精度,在空间上将r=3的加权ENO格式与强紧致格式相结合去处理N-S方程中的对流项以及离散方程的右端项,并用四阶精度的紧致格式去计算N-S方程中的粘性项。
短句来源

 

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  compact scheme
A high-order compact scheme with square-conservativity
      
Fourth order accurate compact scheme with group velocity control (GVC )
      
For improvement of resolution of the shock a parameter function is introduced in compact scheme to control the group velocity.
      
It is found that the proposed compact scheme is not only simple to implement and economical to use, but also is effective to simulate the convection-dominated problem and obtain high-order accurate solution in coarse grid systems.
      
The equations are solved using the two-point fourth-order compact scheme and the Newton-Raphson iteration technique.
      
更多          
  compact schemes
The properties of ninth-order multioperator compact schemes based on known third-and fifth-order compact approximations are examined.
      
High-order composite compact schemes for simulation of viscous gas flows
      
Among high order schemes the compact schemes have higher resolving efficiency.
      
When the compact and upwind compact schemes are used to solve aerodynamic problems there are numerical oscillations near the shocks.
      
Both limiters can ensure the nonlinear compact schemes TVD property.
      
更多          
  compact difference scheme
A fifth-order accurate compact difference scheme was used to compute the flow over an axisymmetric afterbody with jet exhaust.
      
The spatial evolution of 2-D disturbances in supersonic sharp cone boundary layers was investigated by direct numerical simulation (DNS) in high order compact difference scheme.
      
Three-point explicit compact difference scheme with arbitrary order of accuracy and its application in CFD
      
Based on the successive iteration in the Taylor series expansion method, a three-point explicit compact difference scheme with arbitrary order of accuracy is derived in this paper.
      
We have developed a third order accuracy upwind compact difference scheme to numerically study the magnetic reconnection phenomena with high-magnetic Reynolds number (RM=2000-10000) in interplanetary space.
      
更多          
  其他


A upwind compact scheme with dispersion regulator is developed and discussed. The scheme developed is dissipative and the dispersion term in the truncation error can be controlled. According to the behaviour of the flow parameters near the shock the scheme with specially chosen control function gives high resolution. The scheme is simple, efficient and the shock can be captured well. The scheme is used to compute the shock reflection problem, and the computed results are satisfactory.

文中通过对修正方程色散项的耗散类比方法,指出该项在改善数值解中非物理振荡的重要作用,给出了一类依赖于三个自由参量的色散可控迎风紧致格式。通过这三个参量可控制耗散量的大小,也可控制色散量的大小及方向,并给出了一个具体的色散协调因子。文中给出的格式有着精度高、方法简单、计算量小和有着强的对激波的捕捉能力等优点。对二维激波反射问题进行了数值实验。计算结果非常令人满意。

In this paper, we deduced semidescrete energy estimate of a compact scheme for Heat Equation. Secondly, we proceed to analyze stability of total descrete compact difference schemes with unified way, instead of analyzing them one by one. Thirdly, we discussed convergence rate of the sehemes. Finally, we gener-ized our results to mulidimension, especially, we discussed them in detail in 2-D and pointed out there are the same results in more than 2-D cases.

在此文内.我们给出了热传导方程紧致格式的半离散化能量估计.然后,用统一的办法分析了一族全离散格式的稳定性.在此基础上,我们讨论了紧致格式的收敛速度.最后将我们的结果推广到二维并指出在高维情形有同样的结果.

The paper presents a high accurate method for two dimensional incompressible viscous complex flow. Governing equations are used to adopt primitive variables and the formulation of Poisson equation for pressure. The Navier Stokes equation is solved by fourth order accurate compact scheme making as block tridiagonal linear equations for space and the ADI method for time advance in the general non staggered grid system, and the SOR method solves Poisson equation of pressure. A domain decomposition method is...

The paper presents a high accurate method for two dimensional incompressible viscous complex flow. Governing equations are used to adopt primitive variables and the formulation of Poisson equation for pressure. The Navier Stokes equation is solved by fourth order accurate compact scheme making as block tridiagonal linear equations for space and the ADI method for time advance in the general non staggered grid system, and the SOR method solves Poisson equation of pressure. A domain decomposition method is used for complex flow field to improve and to predict the feature and charact er of unsteady flow, by a sub iterative procedure with a successes relaxation scheme for every overlapping sub domain in each time step. The shear driven cavity flow, flow passing the curved tube and unsteady flow past a flat plate normal to the direction of motion have been calculated by this method. The results compare agree well with the experiment and some calculating results reported by other authors.

提出了一种求解二维不可压缩复杂流场的高精度算法.控制方程为原始变量、压力Poisson方程提法.在任意曲线坐标下,采用四阶紧致格式求解Navier-Stokes方程组,时间推进采用交替方向隐式(ADI)格式,在非交错网格上用松弛法求解压力Poisson方程.对于复杂的流场,采用了区域分解方法,并在每一时间步对各子域实施松弛迭代使之能精确地反映非定常流场.利用该算法计算了二维受驱空腔流动,弯管流动和垂直平板的突然起动问题.计算结果与实验结果和其他研究者的计算结果相比较吻合良好.对于平板起动流动,成功地模拟了流场中旋涡的生成以及Karman涡街的形成

 
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