own Code vs. commercial code

Bernhard Mueck

Is there any web-page, where advantages and disadvantages of an own code development for any given problem in CFD versus the usage of an commercial code with user defined subroutines are discussed ? I am interested in arguments for both sides.

I developed an own CFD-Code for the computation of Magnetohydrodynamic channel-flows, since until now (to my knowledge) there is no modeling for it in a commercial code. Four years ago people discouraged me from using a commercial package und writing a subroutine since the code would be very slow in 3d and transient calculations.

Thanks in advance for your comments