It is my effort of producing a text covering both topics , CFD and High Performance Computing (HPC) in one single edition. Since, HPC is mostly discussed with numerical schemes, it is mostly ignored with regard to commercial software of CFD. So I tried to cover this aspect in this text. Simple ways of running a simulation using commercially available software ANSYS FLUENT has been discussed in detail. Some thoughts on GPUs are also shared. I hope people will like to buy this book and will enjoy reading it.