Homogeneous bubble nucleation in rhyolitic melt: Experiments and non-classical theory
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چکیده
منابع مشابه
Homogeneous bubble nucleation in rhyolitic melt: Experiments and nonclassical theory
[1] The transfer of volatiles from the Earth’s interior to the atmosphere occurs through degassing of magma, the dynamics of which assert a significant control on volcanic eruptions. The first and most critical step in degassing is the nucleation of gas bubbles, which requires that a sufficient number of volatile molecules cluster together to overcome the free energy associated with the formati...
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We report experimental data of bubble growth in natural rhyolitic melt with 1.4^2.0 wt% initial total H2O at 0.1 MPa and 500^6003C. Growth of many bubbles is monitored in every experiment. Bubble growth rate increases with temperature and initial total H2O. At a given temperature and initial total H2O, bubble growth rate also increases slightly with bubble size. The average growth rate for bubb...
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We present a kinetic theory of homogeneous bubble nucleation based on explicit calculation of the single-molecule evaporation and condensation rates as a function of the size of the vapor embryo. The surface condensation rate is calculated from the kinetic theory of gases, and the surface evaporation rate is related to the rate of escape of molecules from a potential well in the field establish...
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Homogeneous nucleation rates of nitric acid dihydrate (NAD) at simulated stratospheric conditions – Part I: Experimental results O. Stetzer, O. Möhler, R. Wagner, S. Benz, H. Saathoff, H. Bunz, and O. Indris Institute for Atmospheric and Climate Science, ETH Zurich, Switzerland Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Germany Max-Planck-Institut für Kernphysik,...
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We revisit classical nucleation theory (CNT) for the homogeneous bubble nucleation rate and improve the classical formula using a correct prefactor in the nucleation rate. Most of the previous theoretical studies have used the constant prefactor determined by the bubble growth due to the evaporation process from the bubble surface. However, the growth of bubbles is also regulated by the thermal...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2013
ISSN: 1525-2027
DOI: 10.1002/2013gc004873