CFD refers to computational fluid dynamics. Simply put, it is to use cfd software to optimize design and study and analyze problems through modeling, iterative calculation and analysis. The advantage of cfd lies in saving cost and shortening product cycle. For example, if you want to build a building, you can use cfd to simulate and analyze whether the dog's wind environment, lighting and noise can meet the requirements, so as to further optimize. Compared with the experimental detection, it needs extra manpower and material resources, and if it is unqualified, it will be built and debugged in the later stage, which is very costly and wastes time. Of course, CFD can be applied in many fields, such as architecture, energy, aerospace, sports, mining and so on.