According to my memory.
The air drag force is mainly determined by two kind of force.
One force is the friction force, which is generated by the friction between air molecule and the surface of the car body.
The Other force is pressure difference force, I call it. It can be easily imagined, the air pressure in front of the car body is greater than the pressure behind. So this difference makes a force. The friction force is very small campared to the pressure force.
By changing the body shape, the steam line around the car body is changed. If we can achieve totally laminar state. According to the aerodynamics , the pressure difference is small. But sometimes impingiment flow is occured, because of irregular shape of the body, such as mirror.
【 在 lofuture (在他乡~抵抗寂寞和孤独) 的大作中提到: 】
: 合集也Re.
: 因为我发现好像里面有不少观点跟我的思想相悖。
: 空气阻力？什么是空气阻力，
: ...................
--
FROM 137.226.140.*