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second order accurate
相关语句
  二阶精度
     Second Order Accurate Nonoscillatory Implicit Schames for Euler Equations of Gasdynamics
     解Euler方程组的一类二阶精度无振荡隐式有限差分格式
短句来源
     A CLASS OF SECOND ORDER ACCURATE TVD DIFFERENCE SCHEMES BASED ON FLUX SPLITTING
     一类基于通量分裂的二阶精度TVD差分格式
短句来源
     (1) In time, an implicit time-marching second order accurate scheme is derived.
     (1)推导了具有二阶精度的隐式时间推进格式。
短句来源
     It is shown that there are partial TVD regions after analyzing Lax Wendroff and Warming Beam schemes from the TVD conditions of hyperbolic equation. Based on which, new second order accurate TVD schemes of three or four grids in space are constructed in order to keep second order accuracy near the extreme points.
     从双曲型方程的TVD条件出发,分析了LaxWendrof格式和WarmingBeam格式所存在的TVD区间,构造了空间三点和四点新的二阶TVD格式,使其在极值点也保持二阶精度
短句来源
     A class of space-time second order accurate high resolution MmB difference schemes in 3D
     一类三维时空二阶精度高分辨率MmB差分格式
短句来源
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  “second order accurate”译为未确定词的双语例句
     A Large Time-Step Second Order Accurate TVD Difference Scheme for Hyperbolic Conservation Laws
     双曲型守恒律方程的一个大时间步长二阶TVD差分格式
短句来源
     TVD SUFFICIENT CONDITION FOR IMPLICIT SCHEME OF SECOND ORDER ACCURATE BACKWARD TIME DIFFERENCE
     2阶精度时间后差隐式格式TVD充分条件
短句来源
     A DIMENSIONAL REDUCTION METHOD FOR INCOMPRESSIBLE FLUID DYNAMICS Ⅲ、 SECOND ORDER ACCURATE FINITE ELEMENT SCHEMES
     解不可压缩流体力学问题的降阶法Ⅲ、二阶有限元格式
短句来源
     The Test Investigation of the Second Order Accurate Calculation for Cutting the Hypoid Gears
     准双曲面齿轮二阶精确切齿计算的实验研究
短句来源
     The normal k-ε model etc are used to be turbulence model of the air in cabin respectively, the turbulence model is calculated by SIMPLEF or SIMPLEN algorithm, and by the first order accurate MSU or the second order accurate SUPG in advection discretization scheme. The numerical simulation of the cabin indicates:
     论文对舱内空气、发电机组和公用消声器进行了整体建模和网格划分,施加机组舱模型的边界条件和载荷,采用标准k-ε等多个模型来分别模拟机组舱通风散热的空气湍流流动,采用SIMPLEF和SIMPLEN两种不同的数值算法以及一阶MSU和二阶SUPG的对流项分离方案来对流动模型进行运算。
短句来源
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  相似匹配句对
     About Cone of the Second Order
     关于二次锥面的讨论
短句来源
     the noninertial effect is of second-order.
     惯性力的作用在二阶边界层中才出现。
短句来源
     Second .
     二、破自造论。
短句来源
     On Order
     论秩序
短句来源
     The second;
     第二,专业设置随波逐流;
短句来源
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  second order accurate
In particular, within the specific context of elastodynamics, a second order accurate algorithm is presented that exhibits exact conservation of both total (linear and angular) momentum and total energy.
      
The present scheme gives second order accurate first derivatives and at least first order accurate second derivatives even for stretched and skewed grid.
      
The theoretical orders of accuracy are equal four for the central and one-sided first derivative approximations obtained, whereas the central second derivative formula is either fourth, third, or second order accurate, depending on the grid ratio.
      
A new approach on how to solve such interface problems avoids mesh generation and gives second order accurate results even in the vicinity of the interface.
      
The proposed family of discretizations is second order accurate in time and has conservation and linear and nonlinear stability properties under local CFL conditions.
      
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The incompressible Navier-Stokes equations are used to simulate th?development of some large disturbances into turbulent spots. The vorticity transport equations are approximated by a simple one step semi-explicit, formally second order accurate difference scheme. The scheme is uncondi-tional stable. The velocity field is then determined from a set of Poisson equations. The Poisson equations are solved by using an alternating dire-ction implicit algorithm. The computed vorticity and velocity vectors are...

The incompressible Navier-Stokes equations are used to simulate th?development of some large disturbances into turbulent spots. The vorticity transport equations are approximated by a simple one step semi-explicit, formally second order accurate difference scheme. The scheme is uncondi-tional stable. The velocity field is then determined from a set of Poisson equations. The Poisson equations are solved by using an alternating dire-ction implicit algorithm. The computed vorticity and velocity vectors are corrected on each time step to keep the solenoidality of them. Numerical disturbances are introduced into the Couette flow. Development of distur-bances is investigated. Consistency between numerical results and experi-ments is obtained,

通过数值方法计算了三元不可压NS方程。利用中的单步格式计算了涡度向量方程。速度向量方程是用ADI方法求解的。为保持涡度和速度向量的无散度特性,在计算的每一时间步都对其进行了位势修正。在Couette流的均匀流场中的局部点上给以扰动,并注视其发展过程。用这种方式来数值模拟湍流斑的发生和发展过程。数值结果很好地呈现出了实验给出的一些特性。

Outer inviscid flow about airfoils is computed by transonic small perturbation (TSP) equation and improved TSP equation, using Murman-Cole conservative scheme, nonconservative scheme and Engquist-Osher Scheme. The results show that their stability, convergence and converged solutions are similar except shock wave position. Linear stability of SLOR method with artificial-time-damp(εxt) has been discussed, the conclusions agree with the results of numerical experiments. The accuracy of different tial computation...

Outer inviscid flow about airfoils is computed by transonic small perturbation (TSP) equation and improved TSP equation, using Murman-Cole conservative scheme, nonconservative scheme and Engquist-Osher Scheme. The results show that their stability, convergence and converged solutions are similar except shock wave position. Linear stability of SLOR method with artificial-time-damp(εxt) has been discussed, the conclusions agree with the results of numerical experiments. The accuracy of different tial computation can be improved largely by using second-order accurate scheme. At the end of this paper, an inviscjd-viscous iterative method is used to NACA 0012 airfoil and 6% thickness circular arc airfoil. Computed pressure distributions are compared with experiment data and the agreement is satisfactory.

翼型绕流的外部无粘流,采用跨音速小扰动速势方程和改进小扰动速势方程对三种差分格式进行对比计算:(1)Murman-Cole非守恒式;(2)守恒式;(3)Engquist-Osher式。在相同的初值条件下,它们的计算稳定性、收敛性和收敛解基本相同,但激波位置(1)在前,(2)在后,(3)在中间。对人工时间阻尼项εφ_(xt)的作用进行了线化分析,所得结论与数值实验结果相符。二级精度格式计算表明:采用这种方案能在几乎不增加计算机时的前提下,大大提高差分计算精度。本文最后采用边界层积分方程法,计算翼型边界层,并与势流进行迭代计算。在弱激波条件下,迭代收敛解与实验值接近。

This paper is the 3rd in a series of papers in-which we present a new finite element method for incompressible fluid dynamics-a dimensional reduction method.Here we discuss a class of finite element schemes which contain some second order accurate schemes and the schemes discussed in [4].

在本系列文章里,我们提出一种新的求解不可压缩流体力学问题的有限元方法——降阶法。这种算法是通过寻找零散度空间V~h的一组简单的基函数从而对原来的混合有限元问题降阶来实现的。本文对于一人类解Ω(?)R~2上的NavierStokes方程的有限元格式(包括一些二阶格式和[4]中讨论的一阶格式)给出了空间V~h的基函数。最后给出几个算例。

 
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