Soret Convection in a Shallow Porous Cavity under a Magnetic Field and Submitted to Uniform Fluxes of Heat and Mass
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 112
فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JAFM-9-2_024
تاریخ نمایه سازی: 5 بهمن 1400
چکیده مقاله:
Combined effects of magnetic field and thermodiffusion (Soret effect) on natural convection within an electrically conducting binary mixture, confined in a horizontal sparsely packed porous enclosure subjected to uniform fluxes of heat and mass, is studied analytically and numerically. In the limit of a shallow enclosure, an analytical solution is derived using the parallel flow approximation. The approximate analytical solution is validated against the numerical solution of the full governing equations using a finite difference method. Interesting flow bifurcation phenomena are obtained herein and discussed. The linear stability theory and the parallel flow concept are used to determine explicitly the thresholds for the onset of stationary,subcritical and oscillatory convections as functions of the governing parameters. The obtained results showed the existence of different regions in the (N, Le) plane that correspond to different parallel flow behaviors. The number and the locations of these regions depend on the Soret parameter. The existence of a codimension-۲ point is demonstrated. The effects of the Hartmann number on the fluid flow intensity and heat and mass transfer characteristics are also discussed.
کلیدواژه ها:
نویسندگان
M. Bourich
National School of Applied Sciences, University Cadi Ayyad, Marrakech, Morocco
M. Hasnaoui
FSSM, LMFE, Unit affiliated to CNRST (URA ۲۷), University Cadi Ayyad,Marrakech, Morocco
A. Amahmid
FSSM, LMFE, Unit affiliated to CNRST (URA ۲۷), University Cadi Ayyad,Marrakech, Morocco
M. Er-Raki
High School of Technology, University Cadi Ayyad, Essaouira, Morocco
A. Lagra
National School of Applied Sciences, University Cadi Ayyad, Marrakech, Morocco
M. Mamou
AL/IAR, National Research Council Canada, Ottawa, Ontario, K۱A ۰R۶, Canada