Over the last few decades, non-Newtonian and Nano fluids applications have been increased simultaneously with advanced technology methods. This book, therefore provides fresh theroetical analysis including brief review of non-Newtonian and Nano fluids flow inside various channels or wedge geometries. This text book should assist engineers and researchers who specialize in Nano and non-Newtonian fluids while providing them analytical, numerical and approximate solutions for various cases. However, the book is based mainly on studies that have been published previously in the WSEAS Transactions on Fluid Mechanics Journal.