How to solve coupled differential equations using ode45
显示 更早的评论
Hi all,
I have four couples ODE's to be solved the equations can be seen in the attachment with boundary conditions.
I am having diffuculties in solving them using ODE 45.
Do you have any idea about how I can solve these ODE's.
Thanks in advence
2 个评论
darova
2019-3-10
Can you please rewrite your equations like:
And describe what constants and variables are?
Star Strider
2019-3-10
Do something like this to convert your system to an anonymous function:
syms delta rho_l h_lv phi w_fg v_lp_l delatPrime P_v Y
... CODE ...
[VF, Sbs] = odeToVectorField(ode1, ode2, ode3, ode4);
odesys = matlabFunction(VF, 'Vars',{t, Y, [delta, rho_l, h_lv, phi, w_fg, v_l, p_l, delatPrime, P_v]});
then use bvp4c to do the integration with your chosen boundary conditions.
See the documentation for bvp4c and the other functions I use here to understand how to use them with your system.
回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Ordinary Differential Equations 的更多信息
2019-3-10
2019-3-10
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
