📕 This book is intended for beginners in the field of Computational Fluid Dynamics (CFD), studying in English. If you have never studied CFD before, if you have never worked in the area, and if you have no real idea as to what the discipline is all about, then this book is for you. Although the material has been developed from first principles wherever possible, the book will be of greatest benefit to those who are familiar with the ideas of calculus, elementary vector and matrix algebra and basic numerical methods. The main purpose in writing this book is to provide a simple, satisfying, and motivational approach toward presenting the subject to the reader who is learning about CFD for the first time. In the workplace, CFD is today a mathematically sophisticated discipline. The book is focused on the problems related to aviation and aerospace topics. However, the proposed methods can be easily applied to a wider sphere of science.