I’ve added new resources to the website, chemecomp.com. There you will find Problem 9.26 worked. This is a problem to examine the proposition that if one has a transport problem with a large velocity (Peclet number) it is easier if one converts to gamma= exp(c). You can see there the amount of improvement.
Also available are the meshes for the gradient problem in 11.29. This is used for creating a concentration profile across a width. While the geometry isn’t hard to create, it is tedious, so I’ve done it for you. Also there is the mesh for the hole pressure problem (10.28) and the serpentine mixer (text in Ch. 10 and 11 and problems 10.26 and 11.24.