This equation expresses the time change in the distribution function of dilute gas molecules and is used when discussing gas transport phenomena. The Boltzmann equation is nonlinear and difficult to solve accurately. Similar equations can be applied to fermions and bosons. In the case of electrons in metals, electrical conductivity and thermal conductivity have been calculated. This equation is intuitive, and many attempts have been made to derive it from the general principles of statistical mechanics. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
希薄な気体分子の分布関数の時間変化を表わす方程式で,気体の輸送現象を議論するときなどに用いられる。ボルツマン方程式は非線形で,正確に解くのは困難である。フェルミ粒子 (→フェルミオン ) ,ボース粒子 (→ボソン ) にも同様な方程式を適用できる。金属中の電子の場合には電気伝導率,熱伝導率などが計算されている。この方程式は直観的なもので,統計力学の一般原理からこれを導き出す試みが多くなされている。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
<<: Bordet (English spelling) Jules Jean Baptiste Vincent Bordet
...An institution that handles the so-called thre...
…coordinates with the origin at the center of the...
A solid is a limited portion of space that is sur...
...Some of the latter are said to have guarded th...
…A late Paleolithic culture with the Aurignac sit...
("To" is the idiomatic pronunciation of ...
…In Naples, rebellions by the lower classes occur...
...An ideological trend in psychiatry that emerge...
A sect (school) of Chinese Buddhism that was intr...
A salon gathering of aristocrats and literati. The...
This is a picture scroll of 36 poets selected by ...
In China, an altar was set up by the emperor to wo...
...One of the origins of film is comedy. A garden...
Monks sent overseas by religious organizations to ...
Apathy: A state in which a person lives aloof, wit...