عنوان مقاله :
اتلاف انرژي در جريان همدماي ابرشاره هيليوم II
عنوان به زبان ديگر :
Energy Dissipation in the Isothermal Flow of Superfluid Helium-II
پديد آورندگان :
حوايي، پروين نويسنده ,
اطلاعات موجودي :
فصلنامه سال 1381 شماره 29
كليدواژه :
وراخ ريز , گردابه گوانتيزه , Small hole , نيروي ماگنوس , هليوم , سرعت بحراني , مدل دوشاره اي , اتلاف انرژي , Quantized vortex , Magnus force , Critical velocity tow-fluid model , Superfluid helium , Elementary excitations , تحريكهاي بنيادي
چكيده لاتين :
We consider the Isothermal flow of superfluid Helium through small hole (d S 10-6 m). It is known that below certain velocity, so called critical velocity us c ., there is no dissipation in energy and pressure of the fluid. But
as soon as u s exceeds us., , dissipation arises due to the Magnus force acting on the quantum vortices which may be generated in different kinds such as, line vortex, Ring vortex and Pinned vortex. In this paper we study specifically, the effect of three-Dimensional Magnus force acting on the vortex Ring, and find a relation for energy of dissipation. Equating this relation with the energy of Pressure head (AZ) , we show that the velocity
required for generation and growing a Ring vortex with holeʹs radius is proportional to (AZ)1/2
عنوان نشريه :
مجله دانشكده فني دانشگاه تبريز
عنوان نشريه :
مجله دانشكده فني دانشگاه تبريز
اطلاعات موجودي :
فصلنامه با شماره پیاپی 29 سال 1381
كلمات كليدي :
#تست#آزمون###امتحان
