- #1
muzialis
- 166
- 1
Hello there,
I am facing the second order ODE in the unknown function $$y(t)$$
$$ \ddot{y} = a \dot{y} y - b \dot{l} l - c\dot{l} + d$$ $$a, b, c, d$$ positive constants, such that $$ \frac{a}{b} = \frac{d}{c}$$
I would like to understand more about it before relying on numerical methods.
So far, I have only determined that the long term solution as $$t \to 0$$ is a linear function, $$y(t) = \frac{a}{b}t$$.
If the boundary condition on $$\dot{y}$$ is zero, I get interesting transient behaviour. If the boundary condition on $$\dot{y}$$ equals $$ \frac{a}{b}$$ i get, as expected, a linear solution, which though starts getting very wiggly and wildly oscillating (stiff equation?).
Is there some change of variable, some tecnique, some trick I could use to reduce my equation in a form friendlier for analytic investigations?
Many thanks
I am facing the second order ODE in the unknown function $$y(t)$$
$$ \ddot{y} = a \dot{y} y - b \dot{l} l - c\dot{l} + d$$ $$a, b, c, d$$ positive constants, such that $$ \frac{a}{b} = \frac{d}{c}$$
I would like to understand more about it before relying on numerical methods.
So far, I have only determined that the long term solution as $$t \to 0$$ is a linear function, $$y(t) = \frac{a}{b}t$$.
If the boundary condition on $$\dot{y}$$ is zero, I get interesting transient behaviour. If the boundary condition on $$\dot{y}$$ equals $$ \frac{a}{b}$$ i get, as expected, a linear solution, which though starts getting very wiggly and wildly oscillating (stiff equation?).
Is there some change of variable, some tecnique, some trick I could use to reduce my equation in a form friendlier for analytic investigations?
Many thanks