Analysis of Rayleigh-Benard convection of Bingham nanofluids in a square enclosure

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Analysis of Rayleigh-Benard convection of Bingham nanofluids in a square enclosure

ارائه دهنده: Provider: Armin Amiri

اساتید راهنما: Supervisors: Mohammad Saeed Aghighi (Ph. D)

اساتید مشاور: Advisory Professors:

اساتید ممتحن یا داور: Examining professors or referees: Fazlollah Eskandari Manjili (Ph.D) - Habibollah Sayeh Vand (Ph.D)

زمان و تاریخ ارائه: Time and date of presentation: June, 30, 2020

مکان ارائه: Place of presentation: سمینار3

چکیده: Abstract: In this study Rayleigh-Benard convection of Bingham nanofluids in a square enclosure has been numerically investigated. The governing partial differential equations were solved numerically using a finite element method over a wide range of relevant parameters, including Rayleigh number (), Prandtl number (Pr = 100), Bingham number () and parameters such as Lewis number (), Buoyancy (), the rotational parameters of Brownie and Thermophores (). The concentration field, flow and temperature inside the enclosure were analyzed using concentration, flow and temperature contours. yielded and un-yielded regions in different parts of flow domain have been marked. With the help of local and mean Nasselt and Sherwood numbers, heat transfer and mass were investigated and observed that As the number of Binghams increases The average number of Naslett and Sherwood has decreased and finally The increase in viscosity has led to an increase in un-yielding areas and flow stagnation. It was also observed that the Lewis number affects the transfer of mass (concentration) and there is no significant change in heat transfer. Increasing the floating parameter reduced the flow distribution in the enclosure. By adding the rotational parameters of Brownie and Thermophores were observed That the rate of disorder in the distribution of concentration and temperature has increased. The direction of rotation of the fluid in the enclosure can be clockwise or counterclockwise.

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