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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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Moving-Least-Squares-Methods
移动最小二乘曲线拟合原理,论文中分析了一维和二维的例子,并且同最小二乘法进行比较。(Moving least squares curve fitting principle, the paper analyzes the one-dimensional and two-dimensional case, and compared with the least squares method.)
- 2020-11-06 08:49:49下载
- 积分:1
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SVMPrediction
支持向量基预测的小数据量的预测方法。包括数据拟合,多项式预测等功能()
- 2008-03-08 13:58:11下载
- 积分:1
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jisuan
多孔介质污染物迁移动力学地下水一维渗流的数学模型
差分求解(Contaminant migration in porous media groundwater dynamics differential one-dimensional mathematical model for solving seepage)
- 2020-11-30 10:39:30下载
- 积分:1
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Program
矩阵转换问题
行与列的个数均为n 的矩阵称为n 阶方阵。假定矩阵中的每个元素的值在0到9之间,则可以将矩阵中的所有元素按行依次排列得到一个“单行矩阵字符串”。(Matrix conversion, the number of rows and columns of the matrix n are called n-order square. Assume that each element of matrix value in the 0 to 9, you can press all the elements of the matrix rows in order of priority for a " single matrix string." )
- 2010-12-28 11:42:08下载
- 积分:1
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ANSYScalculating-the-cylinder-craze
这是ansys里面apdl语言,用于计算圆柱体开裂(This is the ansys inside apdl language, used for calculating the cylinder craze)
- 2012-07-02 20:40:35下载
- 积分:1
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hw6
计算流体力学 第六次大作业 计算实例:方腔流 涡量流函数法(CFD sixth large job Calculation example: cavity flow vorticity stream function method)
- 2017-03-23 19:56:51下载
- 积分:1
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jiajian
随机加减法计算,可以用来检测加减法口算能力Random add and subtract calculation(Random add and subtract calculation)
- 2011-08-10 16:58:39下载
- 积分:1
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plate_vibrate_process
本程序主要根据有限元法编写,可以求解薄板的振动和静力分析问题(This procedure mainly based on the preparation of the finite element method can solve the plate vibration and static analysis of the problem)
- 2011-06-10 20:15:16下载
- 积分:1
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MPM_DPD
这是一个关于数字预失真功能仿真的matlab程序,效果不错,希望对大家有所帮助。(This is a matlab program about function estimation of digital estimation,and it has a good performance,really hope it can help you.)
- 2012-06-01 11:28:36下载
- 积分:1