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- clc
- clear all
- global t Tbf Cth Cf L Wtot Ww V tend dt lamda rho Cp T0 a TU TD TR TL H0
- t=0;
- Tbf=-0.47+273.15;
- Cth=2845;
- Cf=1899;
- L=45000;
- Wtot=0.25;
- Ww=0.12;
- V=Ww/Wtot;
- tend=10000;
- dt=0.1;
- lamda=57;
- rho=7900;
- Cp=450;
- T0=270.15;
- Lx=20;
- Nx=20;
- Ly=20;
- Ny=20;
- dx=Lx/(Nx-1);
- dy=Ly/(Ny-1);
- a=lamda/(rho*Cp);
- Kx=(dx)^2/(a*dt);
- Ky=(dy)^2/(a*dt);
- TU=-12+273.15; %температура сверху
- TD=-3.5+273.15; %температура снизу
- TL=-2.5+273.15; %температура слева
- TR=60+273.15; %температура справа
- T=zeros(Nx,Ny);
- H=zeros(Nx,Ny);
- H0=Cf*(T0-Tbf);
- Hnew=H0;
- % Задаем начальные условия для энтальпии
- for i=1:1:Nx
- for j=1:1:Ny
- H(i,j)=H0;
- end
- end
- % Задаем начальные условия для температуры
- for i=1:1:Nx
- for j=1:1:Ny
- T(i,j)=T0;
- end
- end
- % Апроксимация граничных условий
- for j=1;
- for i=1;
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+TL)+Ky*(T(i,j+1)-2*T(i,j)+TD);
- end
- end
- for j=Ny;
- for i=1;
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+TL)+Ky*(TU-2*T(i,j)+T(i,j-1));
- end
- end
- for j=1;
- for i=Nx;
- Hnew(i,j)=H(i,j)+Kx*(TR-2*T(i,j)+T(i-1,j))+Ky*(T(i,j+1)-2*T(i,j)+TD);
- end
- end
- for j=Ny;
- for i=Nx;
- Hnew(i,j)=H(i,j)+Kx*(TR-2*T(i,j)+T(i-1,j))+Ky*(TU-2*T(i,j)+T(i,j-1));
- end
- end
- for i=1;
- for j=2:1:Ny-1
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+TL)+Ky*(T(i,j+1)-2*T(i,j)+T(i,j-1));
- end
- end
- for i=Nx;
- for j=2:1:Ny-1
- Hnew(i,j)=H(i,j)+Kx*(TR-2*T(i,j)+T(i-1,j))+Ky*(T(i,j+1)-2*T(i,j)+T(i,j-1));
- end
- end
- for j=1;
- for i=2:1:Nx-1
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+T(i-1,j))+Ky*(T(i,j+1)-2*T(i,j)+TD);
- end
- end
- for j=Ny;
- for i=2:1:Nx-1
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+T(i-1,j))+Ky*(TU-2*T(i,j)+T(i,j-1));
- end
- end
- % Апроксимация уравнения теплопроводности
- while t<tend
- for i=2:1:Nx-1
- for j=2:1:Ny-1
- Hnew(i,j)=H(i,j)+Kx*(T(i+1,j)-2*T(i,j)+T(i-1,j))+Ky*(T(i,j+1)-2*T(i,j)+T(i,j-1));
- end
- end
- H=Hnew;
- t=t+dt;
- end
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