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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Köhler theory ： ウィキペディア英語版 Köhler theory Köhler theory describes the process in which water vapor condenses and forms liquid cloud drops, and is based on equilibrium thermodynamics. It combines the Kelvin effect, which describes the change in saturation vapor pressure due to a curved surface, and Raoult's Law, which relates the saturation vapor pressure to the solute.〔(【引用サイトリンク】 url=http://nenes.eas.gatech.edu/Experiments/KTA%5B1%5D_files/page0001.htm )〕 It is an important process in the field of cloud physics. It was initially published in 1936 by Hilding Köhler, Professor of Meteorology in the Uppsala University. Köhler equation: $\backslash ln\; \backslash left\; (\; \backslash frac)\}\backslash sigma\_\}\}\; -\; \backslash frac\}^\}$ where $p\_w$ is the droplet water vapor pressure, $p^0$ is the corresponding saturation vapor pressure over a flat surface, $\backslash sigma\_w$ is the droplet surface tension, $\backslash rho\_w$ is the density of pure water, $n\_s$ is the moles of solute, $M\_w$ is the molecular weight of water, and $D\_p$ is the cloud drop diameter. == Köhler curve == The Köhler curve is the visual representation of the Köhler equation. It shows the supersaturation at which the cloud drop is in equilibrium with the environment over a range of droplet diameters. The exact shape of the curve is dependent upon the amount and composition of the solute. The Köhler curves where the solute is sodium chloride are different from when the solute is sodium nitrate or ammonium sulfate. The figure above shows three Köhler curves of sodium chloride. Consider (for a droplets containing solute with diameter equal 0.05 micrometers) a point on the graph where the wet diameter is 0.1 micrometers and the supersaturation is 0.35%. Since the relative humidity is above 100%, the droplet will grow until it is in thermodynamic equilibrium. As the droplet grows, it never encounters equilibrium, and thus grows without bound. However, if the supersaturation is only 0.3%, the drop will only grow until about 0.5 micrometers. The supersaturation at which the drop will grow without bound is called the critical supersaturation. The diameter at which the curve peaks is called the critical diameter. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Köhler theory」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.