approach to solve coupled differential equiations

to whom it may concern, I was wondering how to approach these coupled differential equations numerically using matlab. Note that initially one of the variable is not valid as shown in attachment. Hope anyone can help. Thank you. el-abed

Answer 1

[Torsten]

help bvp4c

Best wishes

Torsten.

[abed]

i did that but the thing is how to define the boundary conditions if some of the conditions defined are not defined initially which means not at z=0 how can i solve that