The fundamental goal of this thesis is to demonstrate how computer science is assisting in evolving the knowledge of the swimming sport. In this thesis, we mention the study of swimming competitions and the application of fluid mechanics to swimming technology and new computer state of the art opens a new field for understanding the complexities of swimming performance.The study further describes in detail the physical nature of the measurement methods and discusses their advantages and disadvantages. In addition to traditional conventional methods like speedometer, accelerometer, we also mention non-traditional methods like CFD method, 3D motion analysis. Additionally, the enormous benefits of eliminating errors in the swimming process, as well as the swimming world’s intense emphasis on computational fluid dynamics. Then, using a numerical method to predict /show the heavy fluid flow in the swimmer’s hands deals with the Navier Stokes equation and The operation of the Tetracyclic speedometer, which successfully tracks the competitor’s speed and efficiency.