利用matlab程序解决热传导问题

1哈佛大学能源与环境学院课程作业报告作业名称：传热学大作业——利用 matlab 程序解决热传导问题院系：能源与环境学院专业：建筑环境与设备工程学号：5201314姓名：盖茨比2015 年 6 月 8 日21、题目及要求1. 原始题目及要求2. 各节点的离散化的代数方程3. 源程序4. 不同初值时的收敛快慢5. 上下边界的热流量(λ=1W/(m℃) )6. 计算结果的等温线图7. 计算小结题目：已知条件如下图所示：二、各节点的离散化的代数方程各温度节点的代数方程ta=(300+b+e)/4 ; tb=(200+a+c+f)/4; tc=(200+b+d+g)/4; td=(2*c+200+h)/4te=(100+a+f+i)/4; tf=(b+e+g+j)/4; tg=(c+f+h+k)/4 ; th=(2*g+d+l)/4ti=(100+e+m+j)/4; tj=(f+i+k+n)/4; tk=(g+j+l+o)/4; tl=(2*k+h+q)/43tm=(2*i+300+n)/24; tn=(2*j+m+p+200)/24; to=(2*k+p+n+200)/24; tp=(l+o+100)/12三、源程序【G-S迭代程序】【方法一】函数文件为：function [y,n]=gauseidel(A,b,x0,eps)D=diag(diag(A));L=-tril(A,-1);U=-triu(A,1);G=(D-L)\U;f=(D-L)\b;y=G*x0+f;n=1;while norm(y-x0)>=epsx0=y;y=G*x0+f;n=n+1;end命令文件为：A=[4,-1,0,0,-1,0,0,0,0,0,0,0,0,0,0,0;-1,4,-1,0,0,-1,0,0,0,0,0,0,0,0,0,0;0,-1,4,-1,0,0,-1,0,0,0,0,0,0,0,0,0;40,0,-2,4,0,0,0,-1,0,0,0,0,0,0,0,0;-1,0,0,0,4,-1,0,0,-1,0,0,0,0,0,0,0;0,-1,0,0,-1,4,-1,0,0,-1,0,0,0,0,0,0;0,0,-1,0,0,-1,4,-1,0,0,-1,0,0,0,0,0;0,0,0,-1,0,0,-2,4,0,0,0,-1,0,0,0,0;0,0,0,0,-1,0,-1,0,4,0,0,0,-1,0,0,0;0,0,0,0,0,-1,0,0,-1,4,-1,0,0,-1,0,0;0,0,0,0,0,0,-1,0,0,-1,4,-1,0,0,-1,0;0,0,0,0,0,0,0,-1,0,0,-2,4,0,0,0,-1;0,0,0,0,0,0,0,0,-2,0,0,0,24,-1,0,0;0,0,0,0,0,0,0,0,0,-2,0,0,-1,24,-1,0;0,0,0,0,0,0,0,0,0,0,-2,0,0,-1,24,-1;0,0,0,0,0,0,0,0,0,0,0,-1,0,0,-1,12];b=[300,200,200,200,100,0,0,0,100,0,0,0,300,200,200,100] ;[x,n]=gauseidel(A,b,[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0] ,1.0e-6)xx=1:1:4;yy=xx;[X,Y]=meshgrid(xx,yy);Z=reshape(x,4,4);Z=Z contour(X,Y,Z,30)Z =139.6088 150.3312 153.0517 153.56395108.1040 108.6641 108.3119 108.152384.1429 67.9096 63.3793 62.421420.1557 15.4521 14.8744 14.7746【方法2】>> t=zeros(5,5);t(1,1)=100;t(1,2)=100;t(1,3)=100;t(1,4)=100;t(1,5)=100;t(2,1)=200;t(3,1)=200;t(4,1)=200;t(5,1)=200;for i=1:10t(2,2)=(300+t(3,2)+t(2,3))/4 ;t(3,2)=(200+t(2,2)+t(4,2)+t(3,3))/4;t(4,2)=(200+t(3,2)+t(5,2)+t(4,3))/4; t(5,2)=(2*t(4,2)+200+t(5,3))/4;t(2,3)=(100+t(2,2)+t(3,3)+t(2,4))/4; t(3,3)=(t(3,2)+t(2,3)+t(4,3)+t(3,4))/4; t(4,3)=(t(4,2)+t(3,3)+t(5,3)+t(4,4))/4; t(5,3)=(2*t(4,3)+t(5,2)+t(5,4))/4;t(2,4)=(100+t(2,3)+t(2,5)+t(3,4))/4; 6t(3,4)=(t(3,3)+t(2,4)+t(4,4)+t(3,5))/4; t(4,4)=(t(4,3)+t(4,5)+t(3,4)+t(5,4))/4;t(5,4)=(2*t(4,4)+t(5,3)+t(5,5))/4;t(2,5)=(2*t(2,4)+300+t(3,5))/24; t(3,5)=(2*t(3,4)+t(2,5)+t(4,5)+200)/24; t(4,5)=(2*t(4,4)+t(3,5)+t(5,5)+200)/24; t(5,5)=(t(5,4)+t(4,5)+100)/12;t endcontour(t ,50);ans =100.0000 200.0000 200.0000 200.0000 200.0000100.0000 136.8905 146.9674 149.8587 150.7444100.0000 102.3012 103.2880 103.8632 104.3496100.0000 70.6264 61.9465 59.8018 59.6008100.0000 19.0033 14.8903 14.5393 14.51177【Jacobi迭代程序】函数文件为：function [y,n]=jacobi(A,b,x0,eps)D=diag(diag(A));L=-tril(A,-1);U=-triu(A,1);B=D\(L+U);f=D\b;y=B*x0+f;n=1;while norm(y-x0)>=epsx0=y;y=B*x0+f;n=n+1;end命令文件为：A=[4,-1,0,0,-1,0,0,0,0,0,0,0,0,0,0,0;-1,4,-1,0,0,-1,0,0,0,0,0,0,0,0,0,0;0,-1,4,-1,0,0,-1,0,0,0,0,0,0,0,0,0;0,0,-2,4,0,0,0,-1,0,0,0,0,0,0,0,0;-1,0,0,0,4,-1,0,0,-1,0,0,0,0,0,0,0;0,-1,0,0,-1,4,-1,0,0,-1,0,0,0,0,0,0;0,0,-1,0,0,-1,4,-1