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Solving the system of ODEs and algebraic Equation
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1593026/image.jpeg)
Error in solution>@(u_s)(y(4,i)-q_j(i))*S1*sin(a)*u_s+(S1*sin(a)).^3*((1/q_j(i).^3)-(1/y(4,i).^3))/(9*u_s)+y(4,i).^2+2*y(4,i)*sqrt(pi*y(2,i))-4*(y(4,i)-q_j(i))*S1/(q_j(i)*u_s)+(16*sin(a)*S1.^2*(y(4,i)-q_j(i)).^2/(3*q_j(i)*y(4,i)*Re))+4*sin(a).^3*S1.^4*(y(4,i)-q_j(i))*(y(4,i).^5-q_j(i).^5)/(15*q_j(i).^7*y(4,i).^5*Re*u_s.^2)-(y(4,i)-q_j(i))*S1*sin(a)/u_s (line 46)
us_eqs = @(u_s) (y(4,i) - q_j(i))*S1*sin(a)*u_s + (S1*sin(a)).^3*((1/q_j(i).^3) - (1/y(4,i).^3))/(9*u_s) + y(4,i).^2 + 2*y(4,i)*sqrt(pi*y(2,i)) - 4*(y(4,i) - q_j(i))*S1/(q_j(i)*u_s) + (16*sin(a)*S1.^2*(y(4,i) - q_j(i)).^2/(3*q_j(i)*y(4,i)*Re)) + 4*sin(a).^3*S1.^4*(y(4,i) - q_j(i))*(y(4,i).^5-q_j(i).^5)/(15*q_j(i).^7*y(4,i).^5*Re*u_s.^2) - (y(4,i) - q_j(i))*S1*sin(a)/u_s;
Error in fsolve (line 270)
fuser = feval(funfcn{3},x,varargin{:});
Caused by:
Failure in initial objective function evaluation. FSOLVE cannot continue.
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Risposte (1)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1564814/image.png)
31 Commenti
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Error in solution>odesym (line 50)
K = ((F^(3/2))/(G(t)^0.5));
Error in solution>@(t,y)odesym(t,y,We,F,G,u_s) (line 44)
sol = ode45(@(t,y) odesym(t,y,We,F,G,u_s),[0 pi],y(:,i));
Error in odearguments (line 92)
f0 = ode(t0,y0,args{:}); % ODE15I sets args{1} to yp0.
Error in ode45 (line 104)
odearguments(odeIsFuncHandle,odeTreatAsMFile, solver_name, ode, tspan, y0, options, varargin);
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1592756/image.png)
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