Click on the 'Open Code' button in the app, and you will see a script (boundaryLayerScript.m) that shows the algorithm behind and how A,B,C,D are constructed based on the x-momentum equation. This topic can be found in many textbooks, such as Computational Heat Transfer by Yogesh Jaluria (page 244, similar but not identical).
13 May 2013
Boundary Layer App
This MATLAB App provides a GUI to study laminar boundary layer problem of flow over a flat plate.