Aerodynamics

…A substance that can freely deform, such as a fluid or gas, is called a fluid in contrast to a solid, and the study of pressure changes and the forces it exerts on surrounding objects when a fluid flows is called by various names, such as hydraulics, fluid mechanics, aerodynamics, and rheology. Of these, aerodynamics deals primarily with high-speed gas flows, while rheology deals primarily with flows of liquids with complex structures, such as colloids and polymers, and they form independent fields. On the other hand, hydraulics and fluid mechanics deal with a wide range of flow problems, and it is difficult to draw a line between them. …

*Some explanations of terms that mention "aerodynamics" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…流体や気体のように自由に変形する物質を固体と対比して流体というが，流体が流れるときの圧力変化や周囲の物体に及ぼす力を調べる学問は，水力学，流体力学，空気力学，レオロジーなど，さまざまな名まえで呼ばれる。このうち，空気力学aerodynamicsは高速の気体の流れを，レオロジーはコロイドや高分子のように複雑な構造をもつ液体の流れを主として取り扱い，独立した分野を形づくっている。　一方，水力学と流体力学は，流れの問題を幅広く取り上げ，その間に一線を画すことはむずかしい。…

※「aerodynamics」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報