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¸÷λǰ±²£¬ÎÒÓÃÓÐÏÞ ²î·Ö·¨½âһάcouetteÁ÷ʱ¼ÆËã½á¹ûÓë½Ì²ÄÖеĽá¹û²»Ò»Ñù£¬ ÎÒÓÃmatlabдµÄ³ÌÐò£¬ÎÒ¶Ô±ÈÁËÒ»ÏÂÖÐ¼ä¼ÆËã½á¹û£¬Óë½Ì²ÄÖеĽá¹ûÏàͬ£¬¾ØÕóÓëÏßÐÔ·½³ÌÓÒ¶ËϵÊý¶¼Ïàͬ£¬Ö»ÓÐÇó½âÖ®ºóµÄ½á¹û²»Í¬¡£ Çë¸÷λǰ±²°ïÎÒ¿´¿´ÎҵijÌÐòÓÐʲôÎÊÌ⣬ÇëÖ¸Õý¡£ %¶¨ÒåÄ£ÐÍ Ylength=1; %ƽ°å³¤¶È detaY=0.05; My=Ylength/detaY; detat=12.5; %ʱ¼ä²½³¤ t=15000; %½á¾§¼ÆËãʱ¼ä Nt=t/detat; %¶¨Òå³õʼÌõ¼þ u=zeros(My+1,1); %¸÷µãËÙ¶È u(My+1)=1; %¼ÆËã¹ý³Ì for AC=1:Nt %Á÷¶¯³¡,Crank-NicolsonËã·¨ ReD=5000; A=-detat/(2*ReD*detaY^2); %²î·ÖϵÊý B=1+detat/(ReD*detaY^2); for j=1:My-1 %Ñ»·¾ØÕó P(j,j)=B; if j>1 P(j-1,j)=A;P(j,j-1)=A; end end for i=2:My %ÓҶ˳£ÊýÏî f(i-1,AC)=(1-detat/(detaY^2*ReD))*u(i,AC)+detat/(2*detaY^2*ReD)*(u(i+1,AC)+u(i-1,AC)); end u(2:My,AC+1)=P\f(:,AC); %´Ë´¦³ö´í u(1,AC+1)=0; u(My+1,AC+1)=1; end |
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