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fft
说明: 实现快速离散傅里叶变换,即FFT,很有用的程序(Fast discrete Fourier transform, namely, FFT, very useful program)
- 2008-10-31 13:46:14下载
- 积分:1
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ErosionTabakoff
用于拓展fluent磨损模型的UDF,采用tabakoff经验公式描述磨损量。(a udf to optimize erosion model in Fluent)
- 2021-03-05 17:19:31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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常微分方程数值解法
常微分方程数值解法,又是一个数值分析的常用算法(Numerical Solution of ordinary differential equations, numerical analysis is a common algorithm)
- 2005-01-31 22:13:30下载
- 积分:1
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4zeyunsuan
复数的四则运算完整版,包括加减乘除,阶乘,开方等。。。(The plural arithmetic full version,, including addition, subtraction, multiplication, and division factorial, prescribing, etc...)
- 2013-10-11 16:41:48下载
- 积分:1
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WilsonMethod
进行结构响应分析的Wilson法,是直接积分的基本算法之一,相信进行有限元动力分析编程的诸位都能用上(structural response analysis of Wilson, which is direct integration one of the basic algorithm, believe that the dynamic finite element analysis program you can use)
- 2006-07-09 11:15:54下载
- 积分:1
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PID自动控制电机转速
说明: 利用pid算法控制电机转速,转速可调,数码管显示,初学者实用(Using PID algorithm to control motor speed, adjustable speed, digital display, beginners practical)
- 2020-06-22 16:00:01下载
- 积分:1
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KrigingContour
说明: 克里金、反距离插值算法_栅格图等值线填充等(Kriging, inverse distance interpolation algorithm _ isogram filled grid map, etc.)
- 2008-11-19 10:41:37下载
- 积分:1
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RollingForceCal
计算热轧中的单机架的轧制压力,采用的是SIMS公式,(rolling force calculation)
- 2010-06-13 18:35:53下载
- 积分:1
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Riemann-problem
一维黎曼问题,计算流体力学,C和Frotran预言代码(Riemann problem)
- 2015-04-29 09:58:22下载
- 积分:1