Browsing by Author "Yibeltal, Gizachew"

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    Thermodynamics of Charge Enhanced Nucleation and Cloud Droplets Formation and Growth:
    (Addis Ababa University, 2020-12-12) Yibeltal, Gizachew; Elfagd, Yitagesu (PhD)
    In this study we considered thermodynamics of the atmosphere,under this We have seen moist air humidity variables mean molecular weight of moist air and other quantities and we derived the virtual temperature Tvrt.We also considered surface tension and nucleation of cloud droplets. we studied homogeneous and heterogeneous nucleation as well as droplet growth and derived the change in droplet radius rd. The result shows that droplet radius grows as the square root of time and how the droplet radius reduces in time through evaporation. In addition to this, we considered thermodynamics of charge enhanced nucleation formation and growth, the source of charge droplet which are,charge separation by the differential motion of drops of different sizes, or the always-present electric current between ionosphere and the Earths surface, which can charge up individual droplets at cloud boundaries. The result shows increasing the charge Q also increases the amount of work done against the electrostatic potential.