…D. Hilbert developed the theory of linear integral equations by expanding simultaneous linear equations, but he became interested in the Boltzmann equation as an application example, and lectured on it to his students, encouraging them to study it. D. Enskok, who received his lecture, discovered a method to obtain what is called a normal solution by successively improving the approximation from the Maxwell distribution, while S. Chapman assumed that deviations from the Maxwell distribution were expanded into polynomials of the thermal velocity of molecules, and discovered a method to obtain the expansion coefficients to satisfy Maxwell's transport equation system. The viscosity and thermal conductivity calculated by both methods were the same, and the equivalence of the two methods was later proven by Grado (1958, 63). … *Some of the terminology explanations that mention "Enskok, D." are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…D.ヒルベルトは連立一次方程式を拡張して線形積分方程式論を作ったが,応用例としてボルツマン方程式に興味をもち,弟子に講義し研究を勧めた。講義を受けたD.エンスコクはマクスウェル分布から逐次に近似を上げて正常解と呼ばれるものを得る方法を発見,他方,S.チャップマンはマクスウェル分布からのはずれを分子の熱運動速度の多項式に展開する形を仮定し,マクスウェルの輸送方程式系を満たすように展開係数を求める方法を発見した。両方法で計算した粘性率,熱伝導率は一致し,のちにグラドによって両方法の同等性が証明されている(1958,63)。… ※「エンスコク,D.」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 |
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