Effacer les filtres
Effacer les filtres

Unable to solve the collocation equations -- a singular Jacobian encountered

2 vues (au cours des 30 derniers jours)
MINATI PATRA
MINATI PATRA le 15 Oct 2020
Commenté : MINATI PATRA le 23 Oct 2020
b1 = 0.1; b2 = 0.01; A = 0.1; L = 1; b = 0.3; M = 1; R = 2; E = 1; Pr = 2; N = 2; rho = 1; a1 = 1; Ec = 10; G = 1;
BC = @(ya,yb)[ya(1)-R; ya([2;7])-1; yb([1;2;7;9]); yb(5)+ yb(1); yb(6)-E;];
ODE = @(x,y) [y(2); y(3); exp(b1*y(7))*(-L*b*y(4)*(y(4)-y(2))+M*y(2)+y(2)^2-y(1)*y(3)+A*(y(2)+(x/2)*y(3)))+b1*y(8)*y(3);
(b*(y(2)-y(4))-y(4)^2-A*y(4))/(y(5)+A.*(x/2)); (b*(y(2)+y(5))-A*y(5))/(y(5)+A.*(x/2));
-(y(6)*(y(4)+(b*(y(2)+y(5))-A*y(5))/(y(5)+A.*(x/2))))/y(5); y(8);
(2*y(2)*y(7)-y(1)*b2*y(8)+(A/2)*(4*y(7)+x*y(8))-(N/rho)*(a1*(y(9)-y(7))+b*Ec*(y(4)-y(1))^2))/(1+b2*y(7));
(a1*G*(y(7)-y(9))-2*(A+y(4))*y(9)-(A.*x/2)*y(8))/y(5);];
xa = 0; xb = 6; x = linspace(xa,xb,100);solinit = bvpinit(x,[R 1 1 0 1 0 1 1 E]);
sol = bvp5c(ODE,BC,solinit); S = deval(sol,x);
figure(2),plot(x,S(2,:),'Linewidth',1.5);xlabel('\bf\eta');ylabel('\bff^\prime(\eta)');hold on
%% when I run this code ERROR comes
  2 commentaires
John D'Errico
John D'Errico le 23 Oct 2020
Modifié(e) : John D'Errico le 23 Oct 2020
Don't add answers asking people to look at your question. If someone wants to answer your question, they will.
And if you want to make a comment, use a comment.
MINATI PATRA
MINATI PATRA le 23 Oct 2020
Sorry
John D'Errico, it was mistakenly happen not intensionaly.
Thank you for guiding.

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