FEA
FEA (Finite Element Analysis) simulates the real physical system (geometry and load cases) by using mathematical approximation. By using simple and interacting elements, i.e., units, it can approximate a system of infinite unknowns with a finite number of unknowns.
CFD
CFD (Computational Fluid Dynamics), is a branch of fluid mechanics. CFD is a combination of modern fluid mechanics, numerical mathematics and computer science. It is an interdisciplinary science with strong vitality. It uses computer as a tool and applies various discrete mathematical methods to carry out numerical experiments, computer simulations and analysis studies on various problems of fluid mechanics to solve various practical problems.