کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
658017 1458075 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mass or heat transfer inside a spherical gas bubble at low to moderate Reynolds number
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Mass or heat transfer inside a spherical gas bubble at low to moderate Reynolds number
چکیده انگلیسی

Mass (or heat) transfer inside a spherical gas bubble rising through a stationary liquid is investigated by direct numerical simulation. Simulations were carried out for bubble Reynolds number ranging from 0.1 to 100 and for Péclet numbers ranging from 1 to 2000. The study focuses on the effect of the bubble Reynolds number on both the interfacial transfer and the saturation time of the concentration inside the bubble. We show that the maximum velocity Umax at the bubble interface is the pertinent velocity to describe both internal and external transfers. The corresponding Sherwood (or Nusselt) numbers and the saturation time can be described by a sigmoid function depending on the Péclet number Pemax = Umaxdb/D (db and D being the bubble diameter and the corresponding diffusion coefficient).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 67, December 2013, Pages 1096–1105
نویسندگان
, , , ,