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| ブシネスク近似× | シュテファン・マクスウェル拡散× | |
|---|---|---|
| 分野 | 熱力学 | 熱力学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1903 | 1871 |
| 提唱者≠ | Joseph Boussinesq | Josef Stefan and James Clerk Maxwell |
| 種類≠ | Approximation technique | Diffusion equation |
| 原典≠ | Boussinesq, J. (1903). Théorie Analytique de la Chaleur. Gauthier-Villars. link ↗ | Reid, R. C., Prausnitz, J. M., & Poling, B. E. (1987). The Properties of Gases and Liquids (4th ed.). McGraw-Hill. ISBN: 978-0071247009 |
| 別名 | buoyancy approximation, Boussinesq model | Stefan-Maxwell equation, multicomponent diffusion |
| 関連 | 3 | 3 |
| 概要≠ | The Boussinesq Approximation simplifies the governing equations for natural convection by treating density as constant except in the buoyancy term. This approximation is valid when temperature variations produce small density changes and allows researchers to solve coupled heat-fluid flow problems without solving the full, nonlinear compressibility equations. The Boussinesq Approximation is fundamental to analyzing buoyancy-driven flows in buildings, enclosures, and geophysical applications. | The Stefan-Maxwell diffusion equation describes how multiple chemical species diffuse through each other in a mixture, accounting for interactions between all species pairs. Unlike Fick's law, which assumes species diffuse independently, Stefan-Maxwell theory captures the coupling that occurs when species with different diffusivities move at different rates. This is essential for analyzing gas separation, combustion, catalytic processes, and reactive distillation. |
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