کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
660403 1458146 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transient natural convection and heat transfer during the storage of granular media
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Transient natural convection and heat transfer during the storage of granular media
چکیده انگلیسی

Transient heat transfer in an originally isothermal cylinder filled with a porous medium after sudden change of wall temperature is studied experimentally and computationally. Lab-scale experiments with water as the interstitial fluid are used in order to imitate the conditions prevailing in large, air-filled industrial silos. The proposed model assumes isotropy of the porous medium, local thermal equilibrium between the phases, Darcy flow and applicability of the Boussinesq approximation. Its predictions are in satisfactory agreement with the experimental results. Simulations reveal the role of dimensionless parameters like the modified porous media Rayleigh number and the cylinder aspect ratio. A criterion for neglecting the influence of natural convection on heat transfer is established.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 13–14, 1 July 2008, Pages 3468–3477
نویسندگان
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