Echiche Köhler

Echiche Köhler na-akọwa usoro nkè mmiri na-ekpo ọkụ na-agbakọta ma na-emepụta mmiri igwe ojii, ma dabere na thermodynamics. Ọ na-ejikọta mmetụta Kelvin, nké na-akọwa mgbanwe na nrụgide ikuku saturation n'ihi elu gbagọrọ agbagọ, na Iwu Raoult, nke na'ejikọta nrụgide ikuku saturatation na solute. Ọ bụ usoro dị mkpà n'ọhịa nke physics igwe ojii. Ọ bụ Hilding Köhler, Prọfesọ nke Meteorology na Mahadum Uppsala bipụtara yá nà afọ 1936.

Kohler curves na-egosi otu oke diamita na supersaturation si dabere na ọnụọgụ nke solute. A na-eche ebe a na solute bụ ihe zuru oke nke sodium chloride.

$\ln \left({\frac {p_{w}(D_{p})}{p^{0}}}\right)={\frac {4M_{w}\sigma _{w}}{RT\rho _{w}D_{p}}}-{\frac {6n_{s}M_{w}}{\pi \rho _{w}D_{p}^{3}}}$

ébé nrụgide mmiri mmiri na-ekpo ọkụ, bụ nrụgide ikuku na-ekwekọ n'elu ala dị larịị, bụ nrụrụ aka n'elu mmiri, bụ njupụta nke mmiri dị ọcha, bụ moles nke solute, bụ ịdị arọ nke mmiri, ọ bụkwa dayameta nke igwe ojii.$p_{w}$$p^{0}$$\sigma _{w}$$\rho _{w}$$n_{s}$$M_{w}$$D_{p}$

Okirikiri Köhler

A na-akpọ echiche Köhler aha Hilding Köhler (1888[[1982). Usoro Köhler bụ ihe ngosi ányà nke usoro Köhler. Ọ na-egosi supersaturation nke igwe ojii na-adaba na gburu-gburu ébé obibi n'ọtụtụ diameters. Ezigbo ọdịdị nke usoro ahụ dabere na ọnụọgụ na ihe mejupụtara solutes dị na ikuku. Usoro Köhler ébé solute bụ sodium chloride dị íchè na mgbè solute bụ soda nitrate ma ọ bụ ammonium sulfate.

Ihe osise dị n'elu na-egosi usoro Köhler atọ nke sodium chloride. Tụlee (maka mmiri nwéré solute nke diamita yá bụ 0.05 micrometers) otu ébé na eserese ébé mmiri dị na 0.1 micrometers na supersaturation bụ 0.35%. Ébé ọ bụ na iru mmiri dị n'elu 100%, droplet ga-eto ruo mgbè ọ nọ na thermodynamic equilibrium. Ka mmiri ahụ na-eto, ọ naghị ahụ nkwụsi ike, ya mèrè ọ na-eto n'enweghị njedebe. Otú ọ dị, ọ bụrụ na supersaturation bụ naanị 0.3%, ọdịda ahụ ga-etolite ruo ihe dị ka 0.5 micrometers. A na-akpọ supersaturation nké ọdịda ahụ ga-etolite n'enweghị njedebe supersaturasion dị oke egwu. A na-akpọ dayameta nke ọnụ ọnụ ọnụ ahụ dị oke egwu.

Hụkwa

• Kelvin equation – Equation describing the change in vapour pressure due to a curved liquid–vapor interface
• Ostwald–Freundlich equation – Equation describing a phase boundary

Edensibia

• [Ihe e dere n'ala ala peeji] Akụkụ dị n'ime na uto nke mmiri hygroscopic. Trans.Faraday Soc., 32, 11521161.
• [Ihe e dere n'ala ala peeji] A Short Course in Cloud Physics, 3rd Ed. Pergamon Press. 293 pp.
• [Ihe e dere n'ala ala peeji] Usoro Microphysical na Clouds. Oxford Press. 427 peeji.
• [Ihe e dere n'ala ala peeji] Atmospheric Science: Nnyocha Nkwupụta. Academic Press. 467 peeji.