Question: Solving ODE with moving boundary conditions

December 02 2013 96mhaynes 10


I am trying to solve a nonlinear second order ODE with a parameter to be determined. I can set up most of the problem but I am having trouble trying to tell the computer the following boundary condition,


diff(f(x),x) = -K on f(x)=0.


(K will be inputted and is not to be solved for) As i said before, the other boundary conditions are fine and the numerical solution works if i use different boundary conditions. 


For other boundary conditions (for example df/dx = 0 at x=0) I write in the form 



I hope this makes sense and someone has a solution. Thanks in advance.



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