The object of fluid dynamics research is the movement of fluids (including liquids and gases) of the state and laws. Sub-disciplines under hydrodynamics include aerodynamics and fluid dynamics. To solve a typical fluid dynamics problem, we need to calculate a number of fluid properties, including speed, pressure, density, temperature. Fluid dynamics have great applications, such as predicting the weather, calculating the forces and moments imposed on the aircraft, and the flow rate of oil in the pipeline. Research on this issue and technical design often used formula Reynolds number, Bernoulli's law, Euler equations, Navier-Stokes equations.