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LGKT4
四阶龙格库塔法解一阶二元微分方程 应用于数值计算(Fourth-order Runge-Kutta method for solving a class of binary differential equations for numerical calculation)
- 2010-06-29 11:55:57下载
- 积分:1
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fft
fft傅里叶快速变化程序,里面说的很清楚,很使用。(FFT Fourier rapid change program, which made it very clear, is to use.
)
- 2014-05-11 20:59:38下载
- 积分:1
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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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UDFlizi
基于FLUENT软件的一些常用UDF实例,比较有帮助(udf example)
- 2015-10-20 15:56:14下载
- 积分:1
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MICRO
电磁场圣经,林为干院士的书,学习电磁场重要材料(EMF Bible, it' s dry academician of the book, an important material for studying the electromagnetic field)
- 2016-06-29 20:30:23下载
- 积分:1
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UDF-sa
FLUENT里面改进的SA湍流模型,为UDF文件,可以进行链接编译计算(FLUENT which improved SA turbulence model for the UDF file can be compiled to calculate the link)
- 2021-01-02 15:18:57下载
- 积分:1
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CALC
以前用VB6编写的一个计算器,支持常用的数学函数,支持弧度、角度转换,支持简单的函数作图。(A calculator writen by VB6, supports common mathematical functions, support radian, angle conversion, support simple function mapping.)
- 2013-11-01 17:33:11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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LBM-cylinder
用LBM结合非平衡外推方法实现的圆柱绕流,柱面边界以非平衡外推方法实现。(LBM combined with the extrapolation method of achieving non-equilibrium flow around a cylinder, cylinder boundary to achieve non-equilibrium extrapolation method.)
- 2021-04-02 14:19:07下载
- 积分:1
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fdtd_2D_TE_PML
fdtd的2d算法,pml边界条件,二维TE波(fdtd the 2d algorithm, pml boundary conditions, 2D TE wave)
- 2007-02-02 16:43:27下载
- 积分:1