question: odesolve with units, boundary conditions

[jmoon]

Hello,

I'm very beginner. I'm trying to solve ode with boundary conditions (see the attached)

I have an error in the unit of second b.c. (n'(10 um) = 0 cm-4).

Please help me to solve this problem.

Thank you in advance.

[lwestbrook]

Hi Jun,

I will point out a couple of issues that I have noticed:

1. Your units do not match in your differential equation. I believe the right hand side should have units if (cm^-3)*s

2. You use the variable alpha in your differential equation, but you have not defined alpha anywhere. The solve block is not putting the error on alpha because there is a built-in constant alpha that the solve block assumes you're using. However, this constant has no units, and in order for your equation to work with units, alpha must have units of [length]^-1

There may be other problems, but at a minimum, the above issues must be addressed