کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1840469 1527732 2015 41 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrodynamics of phase transition fronts and the speed of sound in the plasma
ترجمه فارسی عنوان
هیدرودینامیک جبهه انتقال فاز و سرعت صدا در پلاسما
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
چکیده انگلیسی

The growth of bubbles in cosmological first-order phase transitions involves nontrivial hydrodynamics. For that reason, the study of the propagation of phase transition fronts often requires several approximations. A frequently used approximation consists in describing the two phases as being composed only of radiation and vacuum energy (the so-called bag equation of state). We show that, in realistic models, the speed of sound in the low-temperature phase is generally smaller than that of radiation, and we study the hydrodynamics in such a situation. We find in particular that a new kind of hydrodynamical solution may be possible, which does not arise in the bag model. We obtain analytic results for the efficiency of the transfer of latent heat to bulk motions of the plasma, as a function of the speed of sound in each phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 891, February 2015, Pages 159–199
نویسندگان
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