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

20 Ansichten (letzte 30 Tage)
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 Kommentare
John D'Errico
John D'Errico am 23 Okt. 2020
Bearbeitet: John D'Errico am 23 Okt. 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 am 23 Okt. 2020
Sorry
John D'Errico, it was mistakenly happen not intensionaly.
Thank you for guiding.

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