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Euler_DG_Quadrilateral_2D
自己写了一个二维Euler方程的间断有限元程序
上次发了一个三角形单元的程序 因为不是曲边单元 所以在圆柱后面容易形成涡
现在把程序改为曲边四边形单元了 没有涡出现
单元是8节点四边形单元 节点编号顺序是 1 5 2 6 3 7 4 8 也就是四个角点依次
是1 2 3 4 然后是边的中点编号 5 6 7 8.
时间推进采用 Runge-Kutta 方法
数值通量采用全局Lax-Friedrichs通量
仍然不能捕捉激波 因为没有做重构或者加人工粘性 等这个做出来了 再发一次。
程序没有进行优化 比如说内存的消耗没有优化 比如直边单元的边界积分仍然采
用了曲边的积分方法 增加了计算量 比如面积分、线积分都是采用的是Gauss-
Legendre-Lobatto积分 积分精度会比一般的Gauss-Legendre积分精度低一阶 等
等问题。 二维的 纯属交流性质 就没有考虑这些问题 ^_^
如果物面全部是直边 那么只要改变一个参数N 就可以获得不同的计算精度 且具
有谱精度 因为单元的节点是Gauss-Legendre-Lobatto积分点。 其实就是谱元法
(物面是曲边的情况我不清楚是不是也可以通过提高基函数的阶数 也就是增加N
来提高计算精度)(Wrote a two-dimensional Euler equations with discontinuous finite element program
Last made a triangular element of the program, not curved edge unit is so easy to form a vortex in the cylinder behind the
Program to curved edge quadrilateral element vortices appear
Unit is the order of 8-node quadrilateral element node number is 15,263,748 which is the four corners of the points in turn
Is 1234 and then the side of the midpoint of the number 5678.
Time promote the use of Runge-Kutta method
Numerical flux of the overall situation of Lax-Friedrichs, flux
Still can not capture the shock wave did not do the reconstruction or artificial viscosity do it Zaifayici.
The program is not optimized for example, memory consumption is not optimized such as straight-edge boundary integral of the unit is still mining
Integral method to increase the amount of computation such as surface integral with a curved edge, the line integral using the Gauss-
The Legendr)
- 2021-01-29 12:58:40下载
- 积分:1
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thermal-1
说明: 用LBM代码编写的由于温差而产生的自然对流小程序(As with the LBM code written in natural convection resulting from temperature applet)
- 2021-05-15 11:30:02下载
- 积分:1
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jisuanfangfa
合工大大二计算方法实验的源代码,里面有实验指导书.有牛顿下山,迭代啊什么的(Sophomore calculation experiment source code, which has experimental guide books)
- 2010-06-19 14:42:44下载
- 积分:1
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poisson
poisson生成器,可以生成泊松分布的随机数,需要的就下载吧(poisson sasadas)
- 2011-12-07 01:10:52下载
- 积分:1
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LPA(C)
复杂网络的结构检测室近几年的研究热点,目前最快的算法是标签传播!(Community detection is hot topic in recent years. The most fast algorithm for community detection is Label Propagation Algorithm(LPA),and this is the program!)
- 2021-02-22 16:49:41下载
- 积分:1
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OOPFEM
面向对象的有限元程序设计
——空间8结点等参元的分析计算(Object-oriented finite element program design- space 8 node isoparametric element analysis calculation)
- 2009-03-02 18:47:05下载
- 积分:1
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FilterCal
这个我写的一个计算LC滤波器的程序,可以显示出最后的频率截止情况,有最平法,椭圆法等计算方法(this, I wrote a calculation of the LC filter procedures can demonstrate that the frequency of the final deadline, the most-France, oval law calculation method)
- 2005-08-16 15:43:42下载
- 积分:1
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Desktop
弗洛伊德算法最短距离的实现,输入为邻接矩阵,输出为最短距离矩阵。(Freud' s realization of the algorithm for the shortest distance, enter the adjacency matrix output for the shortest distance matrix.)
- 2012-09-02 15:12:56下载
- 积分:1
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EMD
利用emd算法解决经验模式分解的一些存在的端点效应问题。 有效的解决了问题。(Using emd algorithm to solve some of the empirical mode decomposition end effects exist. Effective solution to the problem.)
- 2020-10-19 16:27:25下载
- 积分:1
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EECCl
椭圆曲线密码体制中的ECC校验验算法分析和程序实现可直接使用。
(The inspection algorithm analysis and procedures of the elliptic curve cryptosystem ECC can be used directly.)
- 2012-06-07 21:01:20下载
- 积分:1