Thermo-Magneto-Convective Transport around a Square Cylinder in a Square Duct under Strong Axial Magnetic Field
- سال انتشار: 1395
- محل انتشار: دوماهنامه مکانیک سیالات کاربردی، دوره: 9، شماره: 5
- کد COI اختصاصی: JR_JAFM-9-5_008
- زبان مقاله: انگلیسی
- تعداد مشاهده: 226
نویسندگان
Simulation & Modeling Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur-۷۱۳۲۰۹, India
Department of Mechanical Engineering, Massachusetts Institute of Technology, ۷۷ Massachusetts Avenue, Cambridge, Massachusetts ۰۲۱۳۹, USA
چکیده
A quasi two-dimensional numerical study is performed to analyze the thermo-magneto-convective transport of liquid metal around a square cylinder in a square duct subjected to a strong externally imposed axial magnetic field. The channel bottom wall is considered heated while the top wall is maintained at the free stream temperature keeping the cylinder adiabatic. The Reynolds and Hartmann numbers are kept in the range and . The flow dynamics in the aforementioned range of parameters reveals the existence of four different regimes out of which the first three ones are similar to the classical non-MHD ۲-D cylinder wakes while the fourth one is characterized by the vortices evolved from the duct side walls due to the boundary layer separation which strongly disturbs the Kármán vortex street. The flow dynamics and heat transfer rate from the heated channel wall are observed to depend on the imposed magnetic field strength. With increasing magnetic field, the flow becomes stabilized resulting in a degradation in the forced convection heat transfer. A special case at a very high Reynolds number with Ha = ۲۱۶۰ is also considered to show the development of a Kelvin–Helmholtz-type instability that substantially affects the heat transfer rate.کلیدواژه ها
Forced convection heat transfer, Square cylinder, Axial magnetic field, MHD flow, Quasi two, dimensional model, Kelvin–Helmholtz, Instabilityاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.