Aerodynamics is a highly refined science that vies for position with other key vehicle design considerations such as styling and ergonomics. Its importance with respect to the operating efficiencies of a vehicle is undisputed, but manufacturers must steer a balanced path between the push and pull of the many other aspects of a car necessary to sell it to the consumer. A study of various aspects of aerodynamics was studied to see how vehicles have evolved over the years. From the designers' point of view, how the form of the vehicles can be maintained while keeping in mind the aerodynamics involved was looked upon. The word comes from two Greek words: aerios, concerning the air, and dynamics, which means force. Aerodynamics is a branch of dynamics concerned with studying the motion of air, particularly when it interacts with a moving object. Aerodynamics is important in a number of applications other than aerospace engineering. It is a significant factor in any type of vehicle design, including automobiles. It is important in the pre[1]diction of forces and moments in sailing. It is used in the design of large components such as hard drive heads. Structural engineers also use aerodynamics, and particularly aeroelasticity, to calculate wind loads in the design of large buildings and bridges. Urban aerodynamics seeks to help town planners and designers improve comfort in outdoor spaces, create urban microclimates, and reduce the effects of urban pollution. The field of environmental aerodynamics studies the ways atmospheric circulation and flight mechanics affect ecosystems. The aerodynamics of internal passages is important in heating and ventilation, gas piping, and in automotive engines where de[1]tailed flow patterns strongly affect the performance of the engine.