How can I solve an ODE that involves a variable parameter?

1 次查看（过去 30 天）
HMGF
HMGF 2016-3-12
回答： Torsten 2016-3-14
I need to solve the next ODE:
dT/dz = h*A*(T-t)/(m*cp).
The parameter "A" is also a function of z, A=f(z) and I already know that function so I am able to calculate A for any value of z. By using the solver ode45, the problem is that I don't know at which "z" I need to evaluate the function A since the solver uses a random step to solve the differencial equation. Any suggestions?

请先登录，再回答此问题。

回答（1 个）

Torsten
Torsten 2016-3-14
The actual value of z is transfered to the function where you define your differential equation. Thus you only have to evaluate A at this specific z:
dTdz = myfun(z,T)
A=@(z)...;
t=...;
m=...;
cp=...;
h=...;
dTdz=h*A(z)*(T-t)/(m*cp)
Best wishes
Torsten.

类别

在 Help Center 和 File Exchange 中查找有关 Numerical Integration and Differential Equations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by