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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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Fourth-order-Runge-Kutta-method
用四阶龙格库塔法计算Lorenz混沌系统的时间序列(The time series of Lorenz chaotic system of fixed step size fourth-order Runge-Kutta method algorithm source code.)
- 2012-05-04 10:55:33下载
- 积分:1
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cycliiqafb
三次样条插值的C语言算法,但是总是数据溢出(Cubic spline interpolation C language algorithm, but always data overflow)
- 2018-11-09 21:05:00下载
- 积分:1
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uystn
这是在MATLAB上的SIMULINK中实现的雷达系统仿真实例,用户可以自己设定目标距离,方向等参数,(This is an example of radar system simulation implemented in SIMULINK on MATLAB. The user can set the target distance, direction and other parameters by himself.)
- 2018-11-15 17:27:38下载
- 积分:1
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omp_mm
利用OPENMP实现矩阵相乘的C程序。Demonstrates a matrix multiply using OpenMP.()
- 2008-02-09 05:56:22下载
- 积分:1
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curthr1
完成地震数据的curvelet阈值重构功能算法简洁注释详细(Completion of seismic data the curvelet threshold reconstruction algorithm is simple function comment in detail)
- 2013-05-08 16:44:51下载
- 积分:1
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fft2d
fft的文件,fortran环境下运行!欢迎指正!(fft documents, fortran environment running! Please correct me!)
- 2021-05-08 18:18:35下载
- 积分:1
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huxiangguan
基于互相关分析的时延估计算法;基于互相关分析的时延估计算法(cross-correlation analysis for time delay calculation)
- 2020-10-25 16:40:00下载
- 积分:1
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sisal_demo
高光谱解混合方法,变分增强拉格朗日线性解混合方法。(A Variable splitting Augmented Lagragian Approach to Linear Spectral Unmixing)
- 2012-07-06 17:31:31下载
- 积分:1
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EPSO
matlab code for exponential PSO
- 2009-05-14 00:51:36下载
- 积分:1