Discretized Equation for 2D incompressible constant property convection homework help
 

I'm shamelessly asking for homework help.
Did I discretize the general equation ok?
http://i.imgur.com/RilcPu2.jpg
http://i.imgur.com/h5gl5S7.jpg

I guess I messed up the source term with the Newman and Dirchlet boundary conditions though... on a 33x33 grid
Top and Bottom
y=1 dpsi/dy=U2 dpsi/dx=0
y=33 dpsi/dy-U1 dsi/dx=0

Side
x=1 & 1<y<17 psi=U2Y
x=1 & 17<y<33 psi=U1+17(U2-U1)