مشخصات پژوهش

عنوان	Rayleigh-Bénard convection of Casson fluid
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	,Rayleigh-Bénard, Natural convection, Yield stress, Casson model Finite element
چکیده	This study aims at investigating numerically the Rayleigh-Bénard Convection (RBC) in viscoplastic fluids. A Casson fluid is considered in a bidimensional square cavity heated from below. The effects of the dimensionless yield stress, the Bingham number Bn, on the heat transfer and motion is investigated in the range 5^10- 3^10. 5 =Ra for the Rayleigh number and Pr= 10, 100, 1000 for the Prandtl number. One shows that the yield stress has a stabilizing effect, reducing the convection intensity. Above a certain value of Bnmax, the convection does not occur and the heat transfer is only due to conduction. For moderate Bn values, truly un- yielded regions are located in the center of the cavity; their areas grow with increasing Bingham number and invade the whole cavity at the threshold value Bnmax.
پژوهشگران	محمدسعید عقیقی (نفر اول)، امین عمار (نفر دوم)، کریستل متیویر (نفر سوم)، مهرداد قراگوزلوحاجیلوئی (نفر چهارم)