کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
801294 904167 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characteristic time of instabilities threshold appearance in transient mixed convection
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Characteristic time of instabilities threshold appearance in transient mixed convection
چکیده انگلیسی

The objective of the present work is to study the evolution of the characteristic time of appearance of instabilities in opposing flows in transient mixed convection. The situation of a vertical pipe with convective exchange at the external surface is considered from a numerical viewpoint. A decrease in the characteristic time of appearance of the instabilities is observed with the increase in the Richardson number. Moreover, a stability diagram of the opposing flows in mixed convection using the Pe–Ri coordinates is proposed. This diagram underlines the critical Richardson number beyond which the flow is always unstable (Ric ≈ 1).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics Research Communications - Volume 35, Issue 8, December 2008, Pages 614–621
نویسندگان
, , ,