I have the following two equations that describe how drug "d" is released from a sphere of radius "r" made of a polymer that diodegrades into "m" monomers: (you can see the equations in the jpg file).
I want to feed matlab with the equations so that I can extract a release time result. Need help with how to present the equations in matlab, which solver to use and any feedback that can make the system clear to my understanding.
FYI: (1.) a: most probably will be 1, (2.) Dm / Dd / k_DH: constants, (3.) the second term of both equations (v_r * (∂C_d)/∂r ) could be omitted at first