diff equation solved by ode45

hi,

in my final project i need to solve an diff equation which represent a physical model

my quation is if ode45 is capable of solveing this problem, our i need to use other matod.

all capital letters are constant numbers.

the equition is in the picture attached.

thanks.

[David Goodmanson]

Hello Anton,

ode45 will solve this problem, but you need a boundary condition. For ode45 the boundary conditiion is an initial condition on y, so if the domain for x is

xmin <= x <= xmax,

then the bc is y(xmin) = (some known value).

[KALYAN ACHARJYA]

What is J here? Is this Jacobian?

Also show us the efforts what you have tried to solve the question?

[anton deyneka]

hi, thanks for the quick answers.

about the boundary condisetions I addressed them, and J is just Constant.

in the pics atteched the original equations and there solution in Matlab.

my main problem is:

whan i solving the it in matlab, i get a good reprsntsion of the Physical model in the graph, but the numbers i get is in scale of 10^5 from the results i expecting to get.

i cheked my self 3 times and all the vribales i enterd are in the right scale and units.

so if have some advice i will appreciate it.

thanks again.