Nano Technology is emerging due to vast applications in many fields recently. The nano fluid usage in convective heat and mass transfer is more significant in many fields like flow boiling, blood flows, environmental studies etc. But the detailed study about nano particle character in convective heat and mass transfer is still needed. An attempt has been made to overcome this shortcoming for the enthusiastic researchers. The book details the computational study of convective heat and mass transfer through geometries like inclined plate, stretching sheet and cylinder. The rare models of thermal conductivity proposed by Graham and viscosity proposed by Jang and Choi are used to describe the particle size in their mathematical forms. The scope of extension or application for real time systems is left to the intellectual researchers or readers.